├── .github ├── FUNDING.yml └── ISSUE_TEMPLATE │ ├── bug_report.md │ ├── custom.md │ └── feature_request.md ├── .gitignore ├── CODE_OF_CONDUCT.md ├── CONTRIBUTING.md ├── LICENSE ├── README.md ├── SECURITY.md ├── challenges ├── beginner │ ├── api-calculator.md │ ├── api-contact-form.md │ ├── api-currency-converter.md │ ├── api-echo.md │ ├── api-hello-world.md │ ├── api-temperature-converter.md │ ├── api-todo-list.md │ ├── api-weather.md │ ├── service-ip-address-tracker.md │ ├── service-number-generator.md │ ├── service-palindrome-checker.md │ ├── service-password-checker.md │ ├── service-password-generator.md │ ├── service-temperature-converter.md │ ├── service-time-zone.md │ └── service-zipcode-lookup.md ├── junior │ ├── api-blog.md │ ├── api-chat-application.md │ ├── api-ecommerce.md │ ├── api-event-scheduling.md │ ├── api-fitness-tracker.md │ ├── api-forum.md │ ├── api-inventory-management.md │ ├── api-movies.md │ ├── api-recipe.md │ ├── api-task-management.md │ ├── api-user-profile.md │ ├── cd-deployment-pipeline.md │ ├── cd-setup-pipeline.md │ ├── ci-build-pipeline.md │ ├── ci-build-testing-pipeline.md │ ├── ci-cd.md │ ├── ci-testing-pipeline.md │ ├── container-docker-compose.md │ ├── container-dockerfile.md │ ├── service-authentication.md │ ├── service-cryptography.md │ ├── service-data-normalization.md │ ├── service-email.md │ ├── service-notification.md │ ├── service-payment-processing.md │ ├── service-url-shortener.md │ └── service-weather-notification.md ├── middle │ ├── advanced-ecommerce-api.md │ ├── analytics-api.md │ ├── caching.md │ ├── cms-api.md │ ├── distributed-caching-api.md │ ├── load-balancer.md │ ├── message-queues.md │ ├── microservices-ecommerce-api.md │ ├── notification-service-api.md │ ├── payment-gateway-integration.md │ ├── real-time-chat-api.md │ ├── subscription-management-api.md │ └── task-scheduling-api.md └── senior │ ├── api-gateway-service-mesh.md │ ├── cqrs-event-sourcing-api.md │ ├── data-processing-api.md │ ├── distributed-tracing-api.md │ ├── event-driven-api.md │ ├── graphql-api.md │ ├── microservices-application.md │ ├── ml-pipeline-api.md │ ├── multi-tenant-api.md │ └── serverless-api.md └── solutions.md /.github/FUNDING.yml: -------------------------------------------------------------------------------- 1 | github: wesleybertipaglia 2 | ko_fi: wesleybertipaglia 3 | custom: https://www.buymeacoffee.com/wesleybertipaglia -------------------------------------------------------------------------------- /.github/ISSUE_TEMPLATE/bug_report.md: -------------------------------------------------------------------------------- 1 | --- 2 | name: Bug report 3 | about: Create a report to help us improve 4 | title: '' 5 | labels: '' 6 | assignees: '' 7 | 8 | --- 9 | 10 | **Describe the bug** 11 | A clear and concise description of what the bug is. 12 | 13 | **To Reproduce** 14 | Steps to reproduce the behavior: 15 | 1. Go to '...' 16 | 2. Click on '....' 17 | 3. Scroll down to '....' 18 | 4. See error 19 | 20 | **Expected behavior** 21 | A clear and concise description of what you expected to happen. 22 | 23 | **Screenshots** 24 | If applicable, add screenshots to help explain your problem. 25 | 26 | **Desktop (please complete the following information):** 27 | - OS: [e.g. iOS] 28 | - Browser [e.g. chrome, safari] 29 | - Version [e.g. 22] 30 | 31 | **Smartphone (please complete the following information):** 32 | - Device: [e.g. iPhone6] 33 | - OS: [e.g. iOS8.1] 34 | - Browser [e.g. stock browser, safari] 35 | - Version [e.g. 22] 36 | 37 | **Additional context** 38 | Add any other context about the problem here. 39 | -------------------------------------------------------------------------------- /.github/ISSUE_TEMPLATE/custom.md: -------------------------------------------------------------------------------- 1 | --- 2 | name: Custom issue template 3 | about: Describe this issue template's purpose here. 4 | title: '' 5 | labels: '' 6 | assignees: '' 7 | 8 | --- 9 | 10 | 11 | -------------------------------------------------------------------------------- /.github/ISSUE_TEMPLATE/feature_request.md: -------------------------------------------------------------------------------- 1 | --- 2 | name: Feature request 3 | about: Suggest an idea for this project 4 | title: '' 5 | labels: '' 6 | assignees: '' 7 | 8 | --- 9 | 10 | **Is your feature request related to a problem? Please describe.** 11 | A clear and concise description of what the problem is. Ex. I'm always frustrated when [...] 12 | 13 | **Describe the solution you'd like** 14 | A clear and concise description of what you want to happen. 15 | 16 | **Describe alternatives you've considered** 17 | A clear and concise description of any alternative solutions or features you've considered. 18 | 19 | **Additional context** 20 | Add any other context or screenshots about the feature request here. 21 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | # Compiled class file 2 | *.class 3 | 4 | # Log file 5 | *.log 6 | 7 | # BlueJ files 8 | *.ctxt 9 | 10 | # Mobile Tools for Java (J2ME) 11 | .mtj.tmp/ 12 | 13 | # Package Files # 14 | *.jar 15 | *.war 16 | *.nar 17 | *.ear 18 | *.zip 19 | *.tar.gz 20 | *.rar 21 | 22 | # virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml 23 | hs_err_pid* 24 | replay_pid* 25 | -------------------------------------------------------------------------------- /CODE_OF_CONDUCT.md: -------------------------------------------------------------------------------- 1 | # Citizen Code of Conduct 2 | 3 | ## 1. Purpose 4 | 5 | A primary goal of Backend Challenges is to be inclusive to the largest number of contributors, with the most varied and diverse backgrounds possible. As such, we are committed to providing a friendly, safe and welcoming environment for all, regardless of gender, sexual orientation, ability, ethnicity, socioeconomic status, and religion (or lack thereof). 6 | 7 | This code of conduct outlines our expectations for all those who participate in our community, as well as the consequences for unacceptable behavior. 8 | 9 | We invite all those who participate in Backend Challenges to help us create safe and positive experiences for everyone. 10 | 11 | ## 2. Open [Source/Culture/Tech] Citizenship 12 | 13 | A supplemental goal of this Code of Conduct is to increase open [source/culture/tech] citizenship by encouraging participants to recognize and strengthen the relationships between our actions and their effects on our community. 14 | 15 | Communities mirror the societies in which they exist and positive action is essential to counteract the many forms of inequality and abuses of power that exist in society. 16 | 17 | If you see someone who is making an extra effort to ensure our community is welcoming, friendly, and encourages all participants to contribute to the fullest extent, we want to know. 18 | 19 | ## 3. Expected Behavior 20 | 21 | The following behaviors are expected and requested of all community members: 22 | 23 | * Participate in an authentic and active way. In doing so, you contribute to the health and longevity of this community. 24 | * Exercise consideration and respect in your speech and actions. 25 | * Attempt collaboration before conflict. 26 | * Refrain from demeaning, discriminatory, or harassing behavior and speech. 27 | * Be mindful of your surroundings and of your fellow participants. Alert community leaders if you notice a dangerous situation, someone in distress, or violations of this Code of Conduct, even if they seem inconsequential. 28 | * Remember that community event venues may be shared with members of the public; please be respectful to all patrons of these locations. 29 | 30 | ## 4. Unacceptable Behavior 31 | 32 | The following behaviors are considered harassment and are unacceptable within our community: 33 | 34 | * Violence, threats of violence or violent language directed against another person. 35 | * Sexist, racist, homophobic, transphobic, ableist or otherwise discriminatory jokes and language. 36 | * Posting or displaying sexually explicit or violent material. 37 | * Posting or threatening to post other people's personally identifying information ("doxing"). 38 | * Personal insults, particularly those related to gender, sexual orientation, race, religion, or disability. 39 | * Inappropriate photography or recording. 40 | * Inappropriate physical contact. You should have someone's consent before touching them. 41 | * Unwelcome sexual attention. This includes, sexualized comments or jokes; inappropriate touching, groping, and unwelcomed sexual advances. 42 | * Deliberate intimidation, stalking or following (online or in person). 43 | * Advocating for, or encouraging, any of the above behavior. 44 | * Sustained disruption of community events, including talks and presentations. 45 | 46 | ## 5. Weapons Policy 47 | 48 | No weapons will be allowed at Backend Challenges events, community spaces, or in other spaces covered by the scope of this Code of Conduct. Weapons include but are not limited to guns, explosives (including fireworks), and large knives such as those used for hunting or display, as well as any other item used for the purpose of causing injury or harm to others. Anyone seen in possession of one of these items will be asked to leave immediately, and will only be allowed to return without the weapon. Community members are further expected to comply with all state and local laws on this matter. 49 | 50 | ## 6. Consequences of Unacceptable Behavior 51 | 52 | Unacceptable behavior from any community member, including sponsors and those with decision-making authority, will not be tolerated. 53 | 54 | Anyone asked to stop unacceptable behavior is expected to comply immediately. 55 | 56 | If a community member engages in unacceptable behavior, the community organizers may take any action they deem appropriate, up to and including a temporary ban or permanent expulsion from the community without warning (and without refund in the case of a paid event). 57 | 58 | ## 7. Reporting Guidelines 59 | 60 | If you are subject to or witness unacceptable behavior, or have any other concerns, please notify a community organizer as soon as possible. security@backendchallenges.com. 61 | 62 | 63 | 64 | Additionally, community organizers are available to help community members engage with local law enforcement or to otherwise help those experiencing unacceptable behavior feel safe. In the context of in-person events, organizers will also provide escorts as desired by the person experiencing distress. 65 | 66 | ## 8. Addressing Grievances 67 | 68 | If you feel you have been falsely or unfairly accused of violating this Code of Conduct, you should notify with a concise description of your grievance. Your grievance will be handled in accordance with our existing governing policies. ./SECURITY.md 69 | 70 | 71 | 72 | ## 9. Scope 73 | 74 | We expect all community participants (contributors, paid or otherwise; sponsors; and other guests) to abide by this Code of Conduct in all community venues--online and in-person--as well as in all one-on-one communications pertaining to community business. 75 | 76 | This code of conduct and its related procedures also applies to unacceptable behavior occurring outside the scope of community activities when such behavior has the potential to adversely affect the safety and well-being of community members. 77 | 78 | ## 10. Contact info 79 | 80 | security@backendchallenges.com 81 | 82 | ## 11. License and attribution 83 | 84 | The Citizen Code of Conduct is distributed by [Stumptown Syndicate](http://stumptownsyndicate.org) under a [Creative Commons Attribution-ShareAlike license](http://creativecommons.org/licenses/by-sa/3.0/). 85 | 86 | Portions of text derived from the [Django Code of Conduct](https://www.djangoproject.com/conduct/) and the [Geek Feminism Anti-Harassment Policy](http://geekfeminism.wikia.com/wiki/Conference_anti-harassment/Policy). 87 | 88 | _Revision 2.3. Posted 6 March 2017._ 89 | 90 | _Revision 2.2. Posted 4 February 2016._ 91 | 92 | _Revision 2.1. Posted 23 June 2014._ 93 | 94 | _Revision 2.0, adopted by the [Stumptown Syndicate](http://stumptownsyndicate.org) board on 10 January 2013. Posted 17 March 2013._ 95 | -------------------------------------------------------------------------------- /CONTRIBUTING.md: -------------------------------------------------------------------------------- 1 | # Contributing to the Learning Repository 2 | 3 | Thank you for your interest in contributing to this repository. Your contributions can help make this repository a valuable resource for the community. Whether you want to fix a typo, add new content, or improve existing materials, your help is greatly appreciated. 4 | 5 | ## How to Contribute 6 | 7 | 1. **Fork the Repository**: If you're not a collaborator or contributor already, fork the repository to your GitHub account. 8 | 9 | 2. **Clone the Repository**: Clone your forked repository to your local machine: 10 | 11 | ``` 12 | git clone https://github.com/wesleybertipaglia/backend-challenges.git 13 | ``` 14 | 15 | 3. **Create a New Branch**: Create a new branch for your contribution: 16 | ` git checkout -b feature/your-contribution` 17 | Please choose a descriptive branch name related to your contribution. 18 | 19 | 4. **Make Your Contribution**: Create or modify content in the repository. You can add new tutorials, fix typos, or improve existing material. 20 | 21 | 5. **Commit Your Changes**: After making your changes, commit them with a clear and concise commit message: 22 | 23 | ``` 24 | git add . 25 | git commit -m "Added a new tutorial on topic X" 26 | ``` 27 | 28 | 6. **Push to Your Fork**: Push your changes to your GitHub fork: 29 | 30 | ``` 31 | git push origin feature/your-contribution 32 | ``` 33 | 34 | 7. **Create a Pull Request**: Go to the original repository on GitHub and create a pull request (PR). Provide a clear description of your changes and why they are valuable. 35 | 36 | 8. **Review and Collaboration**: Collaborators and maintainers will review your PR. Be prepared to address any feedback or suggestions. 37 | 38 | 9. **Merge**: Once your PR is approved, it will be merged into the main repository. -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | MIT License 2 | 3 | Copyright (c) 2024 Wesley Bertipaglia 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy 6 | of this software and associated documentation files (the "Software"), to deal 7 | in the Software without restriction, including without limitation the rights 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 | copies of the Software, and to permit persons to whom the Software is 10 | furnished to do so, subject to the following conditions: 11 | 12 | The above copyright notice and this permission notice shall be included in all 13 | copies or substantial portions of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 | SOFTWARE. 22 | -------------------------------------------------------------------------------- /SECURITY.md: -------------------------------------------------------------------------------- 1 | # Security Policy 2 | 3 | ## Supported Versions 4 | 5 | Use this section to tell people about which versions of your project are 6 | currently being supported with security updates. 7 | 8 | | Version | Supported | 9 | | ------- | ------------------ | 10 | | 5.1.x | :white_check_mark: | 11 | | 5.0.x | :x: | 12 | | 4.0.x | :white_check_mark: | 13 | | < 4.0 | :x: | 14 | 15 | ## Reporting a Vulnerability 16 | 17 | Use this section to tell people how to report a vulnerability. 18 | 19 | Tell them where to go, how often they can expect to get an update on a 20 | reported vulnerability, what to expect if the vulnerability is accepted or 21 | declined, etc. 22 | -------------------------------------------------------------------------------- /challenges/beginner/api-calculator.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Calculator API 2 | 3 | ## Introduction 4 | 5 | The "Calculator API" challenge is designed to build a simple REST API that performs basic arithmetic operations (addition, subtraction, multiplication, division) based on user input. 6 | 7 | ## Objectives 8 | 9 | - Set up a web server capable of handling API requests. 10 | - Implement endpoints for addition, subtraction, multiplication, and division operations. 11 | - Validate user input and handle edge cases (e.g., division by zero). 12 | - Understand HTTP methods (POST for sending data) and status codes. 13 | 14 | ## Instructions 15 | 16 | ### Step-by-Step Guide 17 | 18 | 1. **Objective**: Your task is to develop a REST API that provides endpoints for basic arithmetic operations. 19 | 20 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, C#) and set up the necessary environment. 21 | 22 | 3. **Implementation Details**: 23 | - Create endpoints (`/add`, `/subtract`, `/multiply`, `/divide`) that accept input data via HTTP POST requests. 24 | - Validate input parameters and handle errors (e.g., invalid input, division by zero). 25 | - Implement logic to perform the requested arithmetic operation and return the result as JSON. 26 | 27 | 4. **Testing**: Test your API using a HTTP client (e.g., Postman, curl). 28 | - Send POST requests to each endpoint with appropriate input data (e.g., numbers for calculation). 29 | - Verify that the response contains the correct result and the HTTP status code is 200 (OK) for successful requests. 30 | 31 | ### Requirements 32 | 33 | - Basic knowledge of your chosen programming language. 34 | - Understanding of HTTP methods (POST) and status codes (e.g., 200 OK, 400 Bad Request). 35 | 36 | ## Possible Improvements 37 | 38 | After completing the basic Calculator API challenge, consider these improvements to enhance your API: 39 | 40 | - **Decimal Support**: Extend the API to handle decimal numbers for more precise calculations. 41 | - **Additional Operations**: Add endpoints for more complex operations (e.g., square root, exponentiation). 42 | - **Input Validation**: Implement stricter validation for input data to prevent unexpected behavior. 43 | - **Error Handling**: Enhance error messages and responses to provide clear feedback to API users. 44 | - **Unit Testing**: Write unit tests to validate the correctness of arithmetic operations and edge cases. 45 | 46 | ## Conclusion 47 | 48 | By completing this challenge and exploring possible improvements, you will gain practical experience in developing APIs for arithmetic operations and learn essential practices for building robust backend systems. 49 | 50 | Happy coding! 51 | -------------------------------------------------------------------------------- /challenges/beginner/api-contact-form.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Simple Contact Form API 2 | 3 | ## Introduction 4 | 5 | The "Simple Contact Form API" challenge is designed to build a REST API that handles sending messages from a contact form. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests. 10 | - Implement endpoints for sending messages from a contact form. 11 | - Store or process incoming messages (e.g., send email notifications). 12 | - Understand HTTP methods (POST for sending data) and status codes. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a REST API that receives messages from a contact form and performs actions (e.g., store in database, send email notification). 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, C#) and set up the necessary environment. 19 | 20 | 3. **Implementation Details**: 21 | - Define an endpoint (`/contact`) that accepts message data via HTTP POST requests. 22 | - Implement logic to process the incoming message (e.g., store in a database, send email). 23 | - Return a response indicating the status of the message submission (e.g., success or error message) as JSON. 24 | 25 | 4. **Testing**: Test your API using a HTTP client (e.g., Postman, curl). 26 | - Send POST requests to the `/contact` endpoint with message data (e.g., name, email, message content). 27 | - Verify that the response indicates successful submission and that status codes are appropriate (e.g., 200 OK). 28 | 29 | ### Possible Improvements 30 | 31 | - **Validation**: Implement validation for input fields (e.g., email format). 32 | - **Error Handling**: Enhance error messages and responses for invalid submissions. 33 | - **Security**: Consider implementing measures such as CSRF protection or rate limiting. 34 | - **Integration**: Integrate with external services (e.g., email providers) for message delivery. 35 | 36 | ## Conclusion 37 | 38 | By completing this challenge, you will gain practical experience in developing a Simple Contact Form API and learn essential practices for backend development. Explore additional improvements and challenges to further enhance your skills. 39 | 40 | Happy coding! 41 | -------------------------------------------------------------------------------- /challenges/beginner/api-currency-converter.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Currency Converter API 2 | 3 | ## Introduction 4 | 5 | The "Currency Converter API" challenge is designed to create a REST API that converts currencies between different countries. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests. 10 | - Implement endpoints for converting currencies. 11 | - Integrate with a currency exchange rate provider (or mock exchange rates). 12 | - Understand HTTP methods (GET, POST) and status codes. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a REST API that converts currencies from one to another using real-time or fixed exchange rates. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, C#) and set up the necessary environment. 19 | 20 | 3. **Implementation Details**: 21 | - Define endpoints for handling currency conversion: 22 | - `GET /convert?from={currency_code}&to={currency_code}&amount={value}`: Convert a specific amount from one currency to another. 23 | - `GET /rates`: Retrieve a list of supported currencies and their current exchange rates. 24 | - `POST /rates`: (Optional) Update the exchange rates for the currencies (useful if not relying on an external API). 25 | - Implement logic to interact with currency data (e.g., fetch exchange rates from a third-party API or use a fixed dataset). 26 | - Return data as JSON in responses, including the converted amount and relevant exchange rate. 27 | 28 | 4. **Testing**: Test your API using an HTTP client (e.g., Postman, curl). 29 | - Send requests to each endpoint (`/convert` and `/rates`) with appropriate query parameters. 30 | - Verify that the responses contain the expected conversion results and that status codes are appropriate (e.g., 200 OK, 400 Bad Request). 31 | 32 | ### Possible Improvements 33 | 34 | - **Authentication**: Add API key authentication to secure the endpoints. 35 | - **Caching**: Implement caching for exchange rates to reduce the number of requests to the third-party provider. 36 | - **Historical Rates**: Allow users to convert currencies based on historical exchange rates. 37 | - **Error Handling**: Enhance error messages and responses for better user experience. 38 | - **Multi-Currency Conversion**: Add the ability to convert a single amount into multiple currencies in one request. 39 | 40 | ## Conclusion 41 | 42 | By completing this challenge, you will gain practical experience in developing a currency converter API and learn essential practices for backend development. Explore additional improvements and challenges to further enhance your skills. 43 | 44 | Happy coding! 45 | -------------------------------------------------------------------------------- /challenges/beginner/api-echo.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Echo API 2 | 3 | ## Introduction 4 | 5 | The "Echo API" challenge is designed to build a simple REST API that echoes back the data sent in a POST request. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests. 10 | - Create an endpoint (`/echo`) that accepts data via HTTP POST requests and returns the same data. 11 | - Understand HTTP methods (POST for sending data) and status codes. 12 | 13 | ### Instructions 14 | 15 | 1. **Objective**: Develop a REST API that echoes back data sent in a POST request. 16 | 17 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, C#) and set up the necessary environment. 18 | 19 | 3. **Implementation Details**: 20 | - Set up a web server with an endpoint (`/echo`) that accepts POST requests. 21 | - Retrieve the data sent in the request body. 22 | - Return the received data as JSON or plain text in the response body. 23 | 24 | 4. **Testing**: Test your API using a HTTP client (e.g., Postman, curl). 25 | - Send POST requests to the `/echo` endpoint with different data payloads. 26 | - Verify that the response contains the same data as sent in the request. 27 | 28 | ### Possible Improvements 29 | 30 | - **Response Format**: Add options to return the echoed data in different formats (e.g., JSON, XML). 31 | - **Validation**: Implement validation to ensure the POST request body is not empty. 32 | - **Error Handling**: Handle cases where the API cannot echo back the data (e.g., server error). 33 | - **Logging**: Introduce logging to track incoming requests and responses for debugging purposes. 34 | 35 | ## Conclusion 36 | 37 | By completing this challenge, you will gain practical experience in developing a basic REST API and learn essential practices for backend development. Explore additional improvements and challenges to further enhance your skills. 38 | 39 | Happy coding! 40 | -------------------------------------------------------------------------------- /challenges/beginner/api-hello-world.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Hello World API 2 | 3 | ## Introduction 4 | 5 | The "Hello World API" challenge is designed to introduce beginners to backend development by creating a simple REST API that responds with a "Hello, World!" message when accessed via a specific endpoint. 6 | 7 | ## Objectives 8 | 9 | - Set up a basic web server. 10 | - Create a single endpoint that returns a "Hello, World!" message. 11 | - Understand the basics of HTTP methods and status codes. 12 | 13 | ## Instructions 14 | 15 | ### Step-by-Step Guide 16 | 17 | 1. **Objective**: Your task is to develop a REST API that, when accessed via a specific endpoint, returns the message "Hello, World!". 18 | 19 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, C#) and set up the necessary environment. 20 | 21 | 3. **Implementation Details**: 22 | - Use your chosen language's framework or libraries to create a web server. 23 | - Define a route or endpoint (`/`) that handles GET requests. 24 | - When the endpoint is accessed, the server should respond with the text "Hello, World!". 25 | 26 | 4. **Testing**: Test your API using a HTTP client (e.g., Postman, curl). 27 | - Send a GET request to `http://localhost:{port}/` (replace `{port}` with your server's port). 28 | - Verify that the response body contains "Hello, World!" and the HTTP status code is 200 (OK). 29 | 30 | ### Requirements 31 | 32 | - Basic knowledge of your chosen programming language. 33 | - Understanding of REST API principles (e.g., HTTP methods, status codes). 34 | 35 | ## Possible Improvements 36 | 37 | After completing the basic "Hello World" API challenge, consider these improvements to enhance your API: 38 | 39 | - **Personalized Greeting**: Add an endpoint that accepts a `name` parameter in the URL (`/hello/{name}`) and responds with a personalized greeting (e.g., "Hello, {name}!"). 40 | - **Error Handling**: Implement error handling to return appropriate HTTP status codes (e.g., 404 Not Found for invalid routes). 41 | - **Logging**: Integrate logging to track API requests and responses for troubleshooting and monitoring purposes. 42 | - **Unit Testing**: Write unit tests to validate the functionality of your API endpoints. 43 | - **Documentation**: Provide clear documentation for your API endpoints using tools like Swagger or OpenAPI. 44 | 45 | ## Conclusion 46 | 47 | By completing this challenge and exploring possible improvements, you will gain valuable experience in backend development practices and be better prepared for more complex API projects. 48 | 49 | Happy coding! 50 | -------------------------------------------------------------------------------- /challenges/beginner/api-temperature-converter.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Temperature Converter API 2 | 3 | ## Introduction 4 | 5 | The "Temperature Converter API" challenge is designed to create a REST API that converts temperatures between different units (e.g., Celsius, Fahrenheit, Kelvin). 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests. 10 | - Implement endpoints for converting temperatures between different units. 11 | - Understand HTTP methods (GET) and status codes. 12 | 13 | ### Instructions 14 | 15 | 1. **Objective**: Develop a REST API that converts temperatures between various units. 16 | 17 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, C#) and set up the necessary environment. 18 | 19 | 3. **Implementation Details**: 20 | - Define endpoints for handling temperature conversion: 21 | - `GET /convert?from={unit}&to={unit}&value={temperature}`: Convert a specific temperature from one unit to another. 22 | - Supported units: `Celsius`, `Fahrenheit`, `Kelvin`. 23 | - Example: `GET /convert?from=Celsius&to=Fahrenheit&value=100` should return `212` (since 100°C is 212°F). 24 | - Implement logic to perform the conversion calculations: 25 | - Celsius to Fahrenheit: `(C × 9/5) + 32` 26 | - Fahrenheit to Celsius: `(F − 32) × 5/9` 27 | - Celsius to Kelvin: `C + 273.15` 28 | - Kelvin to Celsius: `K − 273.15` 29 | - Fahrenheit to Kelvin: `(F − 32) × 5/9 + 273.15` 30 | - Kelvin to Fahrenheit: `(K − 273.15) × 9/5 + 32` 31 | - Return the converted temperature as JSON in the response. 32 | 33 | 4. **Testing**: Test your API using an HTTP client (e.g., Postman, curl). 34 | - Send requests to the `/convert` endpoint with various combinations of units and temperatures. 35 | - Verify that the responses contain the expected converted temperature and that status codes are appropriate (e.g., 200 OK, 400 Bad Request). 36 | 37 | ### Possible Improvements 38 | 39 | - **Support Additional Units**: Add support for other temperature units such as `Rankine`. 40 | - **Batch Conversion**: Implement an endpoint that allows conversion of multiple temperature values in one request. 41 | - **Error Handling**: Enhance error messages and responses, especially for invalid units or non-numeric temperature values. 42 | - **Unit Detection**: Allow the API to detect the unit from the input value (e.g., `100C`, `212F`) and convert it accordingly. 43 | - **UI Integration**: Build a simple frontend or UI component that interacts with this API for users to easily convert temperatures. 44 | 45 | ## Conclusion 46 | 47 | By completing this challenge, you will gain practical experience in developing a temperature converter API and learn essential practices for backend development. Explore additional improvements and challenges to further enhance your skills. 48 | 49 | Happy coding! 50 | -------------------------------------------------------------------------------- /challenges/beginner/api-todo-list.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Simple TODO List API 2 | 3 | ## Introduction 4 | 5 | The "Simple TODO List API" challenge is designed to build a RESTful API that allows users to manage a list of tasks. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests. 10 | - Implement endpoints for creating, reading, updating, and deleting tasks. 11 | - Store tasks persistently (e.g., in-memory, database). 12 | - Understand HTTP methods (GET, POST, PUT, DELETE) and status codes. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a RESTful API that manages a TODO list of tasks. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, C#) and set up the necessary environment. 19 | 20 | 3. **Implementation Details**: 21 | - Define endpoints (`/tasks`) for handling CRUD operations: 22 | - `GET /tasks`: Retrieve all tasks. 23 | - `POST /tasks`: Create a new task. 24 | - `GET /tasks/{id}`: Retrieve a specific task by ID. 25 | - `PUT /tasks/{id}`: Update an existing task. 26 | - `DELETE /tasks/{id}`: Delete a task by ID. 27 | - Implement logic to interact with task data (e.g., store tasks in memory, use a database). 28 | - Return task data as JSON in responses. 29 | 30 | 4. **Testing**: Test your API using a HTTP client (e.g., Postman, curl). 31 | - Send requests to each endpoint (`/tasks`) with appropriate data payloads (e.g., JSON for creating/updating tasks). 32 | - Verify that the responses contain the expected task data and that status codes are appropriate (e.g., 200 OK, 404 Not Found). 33 | 34 | ### Possible Improvements 35 | 36 | - **Authentication**: Add user authentication to secure the API endpoints. 37 | - **Pagination**: Implement pagination for `GET /tasks` endpoint to handle large datasets. 38 | - **Validation**: Validate input data to ensure task properties meet expected criteria (e.g., task description length). 39 | - **Error Handling**: Enhance error messages and responses for better user experience. 40 | - **Sorting and Filtering**: Add capabilities to sort and filter tasks based on different criteria (e.g., due date, status). 41 | 42 | ## Conclusion 43 | 44 | By completing this challenge, you will gain practical experience in developing a basic TODO list API and learn essential practices for backend development. Explore additional improvements and challenges to further enhance your skills. 45 | 46 | Happy coding! 47 | -------------------------------------------------------------------------------- /challenges/beginner/api-weather.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Basic Weather API 2 | 3 | ## Introduction 4 | 5 | The "Basic Weather API" challenge is designed to build a RESTful API that retrieves weather information based on user queries. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests. 10 | - Implement endpoints for retrieving weather data. 11 | - Integrate with a weather API provider (e.g., OpenWeatherMap, Weatherstack). 12 | - Understand HTTP methods (GET for retrieving data) and status codes. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a RESTful API that provides weather information based on user queries (city name, geographical coordinates). 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, C#) and set up the necessary environment. 19 | 20 | 3. **Implementation Details**: 21 | - Define an endpoint (`/weather`) that accepts parameters via HTTP GET requests (e.g., city name, latitude and longitude). 22 | - Integrate with a weather API provider to fetch current weather data. 23 | - Parse the response from the weather API provider and return relevant weather information (e.g., temperature, humidity, description) as JSON. 24 | 25 | 4. **Testing**: Test your API using a HTTP client (e.g., Postman, curl). 26 | - Send GET requests to the `/weather` endpoint with different query parameters (e.g., city name, coordinates). 27 | - Verify that the response contains the expected weather data and that status codes are appropriate (e.g., 200 OK). 28 | 29 | ### Possible Improvements 30 | 31 | - **Error Handling**: Implement robust error handling for cases such as invalid queries or API failures. 32 | - **Unit Testing**: Write unit tests to validate the integration with the weather API provider and response parsing. 33 | - **Caching**: Add caching mechanisms to reduce the number of requests to the weather API provider. 34 | - **Enhanced Data**: Extend the API to provide forecasts, historical data, or support for multiple weather providers. 35 | 36 | ## Conclusion 37 | 38 | By completing this challenge, you will gain practical experience in developing a Basic Weather API and learn essential practices for backend development. Explore additional improvements and challenges to further enhance your skills. 39 | 40 | Happy coding! 41 | -------------------------------------------------------------------------------- /challenges/beginner/service-ip-address-tracker.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - IP Address Tracker Service 2 | 3 | ## Introduction 4 | 5 | The "IP Address Tracker Service" challenge is designed to create a REST API that tracks and geolocates IP addresses, providing information about their geographical location. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests. 10 | - Implement endpoints to retrieve geolocation data based on IP addresses. 11 | - Integrate with an external IP geolocation service or use a local dataset. 12 | - Understand HTTP methods (GET) and status codes. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a REST API that returns geolocation information (e.g., city, region, country) based on a given IP address. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, C#) and set up the necessary environment. 19 | 20 | 3. **Implementation Details**: 21 | - Define endpoints for handling IP address lookups: 22 | - `GET /geolocate?ip={ip_address}`: Retrieve geolocation information for the provided IP address. 23 | - Example: `GET /geolocate?ip=8.8.8.8` should return `{"ip": "8.8.8.8", "city": "Mountain View", "region": "California", "country": "USA"}`. 24 | - Implement logic to interact with geolocation data: 25 | - Use an external API (e.g., IPinfo, IPstack, MaxMind) to fetch geolocation details, or use a local dataset if an external API is not available. 26 | - Return geolocation details as JSON in the response, including city, region/state, country, latitude, and longitude. 27 | - Ensure proper error handling for invalid or non-existent IP addresses. 28 | 29 | 4. **Testing**: Test your API using an HTTP client (e.g., Postman, curl). 30 | - Send requests to the `/geolocate` endpoint with various valid and invalid IP addresses. 31 | - Verify that the responses contain the expected geolocation data and that status codes are appropriate (e.g., 200 OK, 400 Bad Request, 404 Not Found). 32 | 33 | ### Possible Improvements 34 | 35 | - **Bulk IP Lookup**: Add an endpoint that allows users to look up geolocation data for multiple IP addresses in one request. 36 | - **Caching**: Implement caching for frequently looked-up IP addresses to reduce external API calls and improve performance. 37 | - **IP Address Validation**: Ensure the provided IP addresses are valid and within the correct format (IPv4 or IPv6). 38 | - **Rate Limiting**: Implement rate limiting to prevent abuse of the service, especially if using a free tier of an external API. 39 | - **Historical Data**: Provide historical geolocation data for IP addresses if available. 40 | 41 | ## Conclusion 42 | 43 | By completing this challenge, you will gain practical experience in developing an IP address tracking and geolocation service, and learn essential practices for backend development. Explore additional improvements and challenges to further enhance your skills. 44 | 45 | Happy coding! 46 | -------------------------------------------------------------------------------- /challenges/beginner/service-number-generator.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Random Number Generator API 2 | 3 | ## Introduction 4 | 5 | The "Random Number Generator API" challenge is designed to build a REST API that generates random numbers based on user-specified parameters. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests. 10 | - Implement an endpoint (`/random`) that generates random numbers. 11 | - Allow customization of the generated numbers (e.g., range, quantity). 12 | - Understand HTTP methods (GET for retrieving data) and status codes. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a REST API that generates random numbers based on user input. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, C#) and set up the necessary environment. 19 | 20 | 3. **Implementation Details**: 21 | - Create an endpoint (`/random`) that accepts parameters via HTTP GET requests. 22 | - Parameters could include `min` and `max` for range, and `quantity` for the number of random numbers to generate. 23 | - Implement logic to generate random numbers within the specified range and quantity. 24 | - Return the generated numbers as JSON in the response body. 25 | 26 | 4. **Testing**: Test your API using a HTTP client (e.g., Postman, curl). 27 | - Send GET requests to the `/random` endpoint with different parameter values (e.g., `min`, `max`, `quantity`). 28 | - Verify that the response contains the expected number of random numbers within the specified range. 29 | 30 | ### Possible Improvements 31 | 32 | - **Additional Parameters**: Add support for additional parameters like seed for reproducibility. 33 | - **Error Handling**: Implement error handling for invalid input parameters (e.g., negative range, non-numeric values). 34 | - **Security**: Consider security implications, especially if the API is exposed to the public internet. 35 | - **Performance**: Optimize the random number generation algorithm for performance, especially with large quantities. 36 | 37 | ## Conclusion 38 | 39 | By completing this challenge, you will gain practical experience in developing a REST API that generates random numbers and learn essential practices for backend development. Explore additional improvements and challenges to further enhance your skills. 40 | 41 | Happy coding! 42 | -------------------------------------------------------------------------------- /challenges/beginner/service-palindrome-checker.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Palindrome Checker API 2 | 3 | ## Introduction 4 | 5 | The "Palindrome Checker API" challenge is designed to build a REST API that determines whether a given string is a palindrome. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests. 10 | - Implement an endpoint (`/check`) for checking palindromes. 11 | - Understand HTTP methods (POST for sending data) and status codes. 12 | 13 | ### Instructions 14 | 15 | 1. **Objective**: Develop a REST API that checks whether a given string is a palindrome. 16 | 17 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, C#) and set up the necessary environment. 18 | 19 | 3. **Implementation Details**: 20 | - Define an endpoint (`/check`) that accepts a string via HTTP POST requests. 21 | - Implement logic to determine if the input string is a palindrome. 22 | - Return a response indicating whether the string is a palindrome (true/false) as JSON. 23 | 24 | 4. **Testing**: Test your API using a HTTP client (e.g., Postman, curl). 25 | - Send POST requests to the `/check` endpoint with different strings. 26 | - Verify that the response correctly identifies whether each string is a palindrome and that status codes are appropriate (e.g., 200 OK). 27 | 28 | ### Possible Improvements 29 | 30 | - **Case Insensitivity**: Make the palindrome check case-insensitive (e.g., "Racecar" should be considered a palindrome). 31 | - **Whitespace Handling**: Ignore whitespace characters during palindrome check. 32 | - **Edge Cases**: Handle edge cases such as empty strings or single-character strings. 33 | - **Performance**: Optimize the palindrome checking algorithm for efficiency, especially for longer strings. 34 | 35 | ## Conclusion 36 | 37 | By completing this challenge, you will gain practical experience in developing a Palindrome Checker API and learn essential practices for backend development. Explore additional improvements and challenges to further enhance your skills. 38 | 39 | Happy coding! 40 | -------------------------------------------------------------------------------- /challenges/beginner/service-password-checker.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Password Checker Service 2 | 3 | ## Introduction 4 | 5 | The "Password Checker Service" challenge is designed to create a REST API that evaluates the strength and security of passwords, providing feedback on how to improve them. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests. 10 | - Implement endpoints to evaluate password strength. 11 | - Provide feedback on password complexity and suggest improvements. 12 | - Understand HTTP methods (POST) and status codes. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a REST API that checks the strength and security of a given password and provides feedback on how to improve it. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, C#) and set up the necessary environment. 19 | 20 | 3. **Implementation Details**: 21 | - Define endpoints for handling password checks: 22 | - `POST /check-password`: Evaluate the strength of the provided password. 23 | - Example request body: `{"password": "P@ssw0rd123!"}` 24 | - Example response: 25 | ```json 26 | { 27 | "password": "P@ssw0rd123!", 28 | "strength": "Medium", 29 | "suggestions": [ 30 | "Add more characters", 31 | "Include special symbols", 32 | "Avoid common patterns" 33 | ] 34 | } 35 | ``` 36 | - Implement logic to assess password strength: 37 | - Evaluate password length, use of upper and lower case letters, numbers, special characters, and common patterns (e.g., "1234", "password"). 38 | - Optionally, integrate with a breached password database (e.g., Have I Been Pwned) to check if the password has been compromised. 39 | - Return a JSON response indicating the password's strength (e.g., "Weak", "Medium", "Strong") and suggestions for improvement. 40 | - Ensure proper error handling for empty or invalid inputs. 41 | 42 | 4. **Testing**: Test your API using an HTTP client (e.g., Postman, curl). 43 | - Send requests to the `/check-password` endpoint with various password examples. 44 | - Verify that the responses contain appropriate strength assessments and suggestions, and that status codes are correct (e.g., 200 OK, 400 Bad Request). 45 | 46 | ### Possible Improvements 47 | 48 | - **Password History Check**: Implement functionality to ensure the password hasn't been used before by the same user (useful in systems where passwords are rotated). 49 | - **Password Complexity Requirements**: Allow customizable complexity requirements (e.g., minimum length, required characters) through API configuration. 50 | - **Real-Time Feedback**: Provide real-time feedback as users type (useful in a UI context, with frontend integration). 51 | - **Integration with Authentication**: Build this service into an authentication flow, enforcing password strength rules at the time of user registration or password change. 52 | - **Multilingual Support**: Provide feedback and suggestions in multiple languages based on user preference. 53 | 54 | ## Conclusion 55 | 56 | By completing this challenge, you will gain practical experience in developing a password checker service and learn essential practices for enhancing security in backend development. Explore additional improvements and challenges to further enhance your skills. 57 | 58 | Happy coding! 59 | -------------------------------------------------------------------------------- /challenges/beginner/service-password-generator.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Password Generator Service 2 | 3 | ## Introduction 4 | 5 | The "Password Generator Service" challenge is designed to create a REST API that generates secure, random passwords based on user-defined criteria. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests. 10 | - Implement endpoints to generate passwords with varying complexity. 11 | - Provide options for customizing password length, character types, and complexity. 12 | - Understand HTTP methods (GET) and status codes. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a REST API that generates secure passwords based on specified criteria. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, C#) and set up the necessary environment. 19 | 20 | 3. **Implementation Details**: 21 | - Define endpoints for handling password generation: 22 | - `GET /generate-password`: Generate a secure password based on query parameters. 23 | - Example query parameters: 24 | - `length={length}`: The desired length of the password (e.g., `length=12`). 25 | - `include_uppercase={true/false}`: Include uppercase letters (e.g., `include_uppercase=true`). 26 | - `include_numbers={true/false}`: Include numbers (e.g., `include_numbers=true`). 27 | - `include_special={true/false}`: Include special characters (e.g., `include_special=true`). 28 | - Example request: `GET /generate-password?length=16&include_uppercase=true&include_numbers=true&include_special=true` 29 | - Example response: 30 | ```json 31 | { 32 | "password": "A1b@C2d#E3f$G4h%" 33 | } 34 | ``` 35 | - Implement logic to generate the password: 36 | - Randomly select characters from the specified categories (uppercase, lowercase, numbers, special characters) to construct the password. 37 | - Ensure that the generated password meets the specified criteria. 38 | - Return the generated password as a JSON response. 39 | - Ensure proper error handling for invalid input values (e.g., non-numeric length). 40 | 41 | 4. **Testing**: Test your API using an HTTP client (e.g., Postman, curl). 42 | - Send requests to the `/generate-password` endpoint with various combinations of query parameters. 43 | - Verify that the responses contain passwords that match the specified criteria and that status codes are appropriate (e.g., 200 OK, 400 Bad Request). 44 | 45 | ### Possible Improvements 46 | 47 | - **Passphrase Generation**: Add support for generating passphrases (e.g., combining random words) instead of just character-based passwords. 48 | - **Password Strength Indicator**: Include an option to return a strength assessment of the generated password along with the password itself. 49 | - **Batch Generation**: Implement functionality to generate multiple passwords in a single request. 50 | - **Avoid Ambiguous Characters**: Add an option to exclude characters that can be easily confused (e.g., `O`, `0`, `l`, `1`). 51 | - **Multi-Language Support**: Provide options to generate passwords using character sets from different languages (e.g., Cyrillic, Chinese). 52 | 53 | ## Conclusion 54 | 55 | By completing this challenge, you will gain practical experience in developing a password generator service and learn essential practices for enhancing security in backend development. Explore additional improvements and challenges to further enhance your skills. 56 | 57 | Happy coding! 58 | -------------------------------------------------------------------------------- /challenges/beginner/service-temperature-converter.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Temperature Converter API 2 | 3 | ## Introduction 4 | 5 | The "Temperature Converter API" challenge is designed to build a REST API that converts temperatures between different units (Celsius, Fahrenheit, Kelvin). 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests. 10 | - Implement endpoints for converting temperatures. 11 | - Support conversions between Celsius, Fahrenheit, and Kelvin. 12 | - Understand HTTP methods (GET for retrieving data) and status codes. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a REST API that converts temperatures between Celsius, Fahrenheit, and Kelvin. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, C#) and set up the necessary environment. 19 | 20 | 3. **Implementation Details**: 21 | - Define endpoints (`/convert`) for temperature conversion: 22 | - `GET /convert?from={unit}&to={unit}&value={temperature}`: Convert a temperature value from one unit to another. 23 | - Implement logic to handle conversions between Celsius (°C), Fahrenheit (°F), and Kelvin (K). 24 | - Return the converted temperature as JSON in the response body. 25 | 26 | 4. **Testing**: Test your API using a HTTP client (e.g., Postman, curl). 27 | - Send GET requests to the `/convert` endpoint with different parameter values (e.g., `from`, `to`, `value`). 28 | - Verify that the response contains the correctly converted temperature and that status codes are appropriate (e.g., 200 OK, 400 Bad Request). 29 | 30 | ### Possible Improvements 31 | 32 | - **Additional Units**: Extend the API to support more temperature units (e.g., Rankine, Celsius to Fahrenheit, etc.). 33 | - **Decimal Precision**: Improve precision handling for temperature conversions. 34 | - **Error Handling**: Implement validation for input parameters and error messages for invalid requests. 35 | - **Unit Tests**: Write unit tests to validate the correctness of temperature conversions. 36 | 37 | ## Conclusion 38 | 39 | By completing this challenge, you will gain practical experience in developing a basic Temperature Converter API and learn essential practices for backend development. Explore additional improvements and challenges to further enhance your skills. 40 | 41 | Happy coding! 42 | -------------------------------------------------------------------------------- /challenges/beginner/service-time-zone.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Time Zone Service 2 | 3 | ## Introduction 4 | 5 | The "Time Zone Service" challenge is designed to create a REST API that retrieves time zone information based on geographical data or location identifiers. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests. 10 | - Implement endpoints to retrieve time zone information based on location data (e.g., coordinates, city names, or IP addresses). 11 | - Integrate with an external time zone API or use a local dataset. 12 | - Understand HTTP methods (GET) and status codes. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a REST API that returns time zone information (e.g., time zone name, UTC offset, current local time) based on a given location. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, C#) and set up the necessary environment. 19 | 20 | 3. **Implementation Details**: 21 | - Define endpoints for handling time zone lookups: 22 | - `GET /timezone?location={location}`: Retrieve time zone information for the provided location identifier. 23 | - Example: `GET /timezone?location=New York` should return `{"location": "New York", "timezone": "America/New_York", "utc_offset": "-04:00", "current_time": "2024-08-03T15:00:00"}`. 24 | - `GET /timezone?lat={latitude}&lon={longitude}`: Retrieve time zone information based on geographic coordinates. 25 | - Example: `GET /timezone?lat=40.7128&lon=-74.0060` should return similar information as the location-based query above. 26 | - Implement logic to interact with time zone data: 27 | - Use an external API (e.g., Google Time Zone API, TimeZoneDB) to fetch time zone details, or use a local dataset if an external API is not available. 28 | - Return time zone details as JSON in the response, including time zone name, UTC offset, and current local time. 29 | - Ensure proper error handling for invalid or non-existent locations. 30 | 31 | 4. **Testing**: Test your API using an HTTP client (e.g., Postman, curl). 32 | - Send requests to the `/timezone` endpoint with various valid and invalid location data (city names, coordinates, IP addresses). 33 | - Verify that the responses contain the expected time zone data and that status codes are appropriate (e.g., 200 OK, 400 Bad Request, 404 Not Found). 34 | 35 | ### Possible Improvements 36 | 37 | - **Time Zone by IP**: Add support to retrieve time zone information based on an IP address (e.g., `GET /timezone?ip={ip_address}`). 38 | - **Time Conversion**: Implement an endpoint that allows users to convert a specific time between time zones (e.g., `GET /convert?from=UTC&to=America/New_York&time=2024-08-03T12:00:00Z`). 39 | - **Caching**: Implement caching for frequently requested locations to reduce external API calls and improve performance. 40 | - **Time Zone Abbreviations**: Provide additional information such as time zone abbreviations (e.g., EST, PST). 41 | - **Rate Limiting**: Implement rate limiting to prevent abuse of the service, especially if using a free tier of an external API. 42 | - **Daylight Saving Time**: Account for daylight saving time changes in the time zone data returned. 43 | 44 | ## Conclusion 45 | 46 | By completing this challenge, you will gain practical experience in developing a time zone information service and learn essential practices for backend development. Explore additional improvements and challenges to further enhance your skills. 47 | 48 | Happy coding! 49 | -------------------------------------------------------------------------------- /challenges/beginner/service-zipcode-lookup.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Zip Code Lookup Service 2 | 3 | ## Introduction 4 | 5 | The "Zip Code Lookup Service" challenge is designed to create a REST API that retrieves location information based on zip codes. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests. 10 | - Implement endpoints to look up location details based on zip codes. 11 | - Integrate with an external API or use a dataset for location information. 12 | - Understand HTTP methods (GET) and status codes. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a REST API that returns location information (e.g., city, state, country) based on a given zip code. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, C#) and set up the necessary environment. 19 | 20 | 3. **Implementation Details**: 21 | - Define endpoints for handling zip code lookups: 22 | - `GET /lookup?zip={zip_code}`: Retrieve location information for the provided zip code. 23 | - Example: `GET /lookup?zip=90210` should return `{"city": "Beverly Hills", "state": "CA", "country": "USA"}`. 24 | - Implement logic to interact with location data: 25 | - Use an external API (e.g., Zipcodebase, Zippopotam.us) to fetch location details, or use a local dataset if an external API is not available. 26 | - Return location details as JSON in the response, including city, state/province, and country. 27 | - Ensure proper error handling for invalid or non-existent zip codes. 28 | 29 | 4. **Testing**: Test your API using an HTTP client (e.g., Postman, curl). 30 | - Send requests to the `/lookup` endpoint with various valid and invalid zip codes. 31 | - Verify that the responses contain the expected location data and that status codes are appropriate (e.g., 200 OK, 404 Not Found). 32 | 33 | ### Possible Improvements 34 | 35 | - **Reverse Lookup**: Add an endpoint that allows users to retrieve zip codes based on city and state. 36 | - **Caching**: Implement caching for frequently looked-up zip codes to reduce external API calls and improve performance. 37 | - **Autocomplete Feature**: Provide suggestions for locations as users type in the zip code (useful for building a UI). 38 | - **Multi-Country Support**: Expand the service to support zip codes from multiple countries. 39 | - **Rate Limiting**: Implement rate limiting to prevent abuse of the service, especially if using a free tier of an external API. 40 | 41 | ## Conclusion 42 | 43 | By completing this challenge, you will gain practical experience in developing a zip code lookup service and learn essential practices for backend development. Explore additional improvements and challenges to further enhance your skills. 44 | 45 | Happy coding! 46 | -------------------------------------------------------------------------------- /challenges/junior/api-blog.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Blog API 2 | 3 | ## Introduction 4 | 5 | The "Blog API" challenge is designed to build a RESTful API that allows users to manage blog posts, comments, and potentially user accounts. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests. 10 | - Implement endpoints for CRUD operations on blog posts and comments. 11 | - Handle user authentication and authorization (optional). 12 | - Understand HTTP methods (GET, POST, PUT, DELETE) and status codes. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a RESTful API that provides functionality for managing blog posts and comments. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, C#) and set up the necessary environment. 19 | 20 | 3. **Implementation Details**: 21 | - Define endpoints for blog posts (`/posts`) and comments (`/posts/{postId}/comments`): 22 | - `GET /posts`: Retrieve all blog posts. 23 | - `POST /posts`: Create a new blog post. 24 | - `GET /posts/{postId}`: Retrieve a specific blog post by ID. 25 | - `PUT /posts/{postId}`: Update an existing blog post. 26 | - `DELETE /posts/{postId}`: Delete a blog post. 27 | - `GET /posts/{postId}/comments`: Retrieve comments for a specific blog post. 28 | - `POST /posts/{postId}/comments`: Add a new comment to a blog post. 29 | - Implement logic to interact with blog post and comment data (e.g., store in database). 30 | - Optionally, implement user authentication and authorization for managing blog content. 31 | 32 | 4. **Testing**: Test your API using a HTTP client (e.g., Postman, curl). 33 | - Send requests to each endpoint (`/posts`, `/posts/{postId}/comments`) with appropriate data payloads (e.g., JSON for creating/updating blog posts, comments). 34 | - Verify that the responses contain the expected data and that status codes are appropriate (e.g., 200 OK, 404 Not Found). 35 | 36 | ### Possible Improvements 37 | 38 | - **Pagination**: Implement pagination for listing blog posts and comments. 39 | - **Validation**: Validate input data to ensure blog posts and comments meet expected criteria (e.g., required fields). 40 | - **Error Handling**: Enhance error messages and responses for invalid requests. 41 | - **Security**: Secure API endpoints, especially those involving user authentication and authorization. 42 | - **Performance**: Optimize database queries and API responses for better performance. 43 | 44 | ## Conclusion 45 | 46 | By completing this challenge, you will gain practical experience in developing a Blog API and learn essential practices for backend development. Explore additional improvements and challenges to further enhance your skills. 47 | 48 | Happy coding! 49 | -------------------------------------------------------------------------------- /challenges/junior/api-chat-application.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Chat Application API 2 | 3 | ## Introduction 4 | 5 | The "Chat Application API" challenge is designed to build a RESTful API that supports real-time messaging between users. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests. 10 | - Implement endpoints for managing users, conversations, and messages. 11 | - Handle real-time communication for instant messaging. 12 | - Understand HTTP methods (GET, POST, PUT, DELETE) and status codes. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a RESTful API that provides functionality for a chat application. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, C#) and set up the necessary environment. 19 | 20 | 3. **Implementation Details**: 21 | - Define endpoints: 22 | - `POST /register`: Register a new user. 23 | - `POST /login`: Authenticate a user and generate a session token. 24 | - `GET /users`: Retrieve a list of all users. 25 | - `GET /users/{userId}`: Retrieve details about a specific user. 26 | - `PUT /users/{userId}`: Update user information (e.g., username, profile picture). 27 | - `DELETE /users/{userId}`: Delete a user account. 28 | - `POST /conversations`: Start a new conversation between users. 29 | - `GET /conversations/{conversationId}`: Retrieve messages from a specific conversation. 30 | - `POST /conversations/{conversationId}/message`: Send a message to a conversation. 31 | - `DELETE /conversations/{conversationId}/message/{messageId}`: Delete a message from a conversation. 32 | - Implement logic to manage user sessions, store conversations, and handle message delivery. 33 | - Use technologies like WebSockets or long-polling for real-time messaging capabilities. 34 | 35 | 4. **Testing**: Test your API using a HTTP client (e.g., Postman, curl). 36 | - Register new users, authenticate with login, and perform CRUD operations on users, conversations, and messages. 37 | - Test real-time messaging functionality to ensure messages are delivered instantly and updates are reflected in conversations. 38 | 39 | ### Possible Improvements 40 | 41 | - **Message Encryption**: Implement end-to-end encryption for message security. 42 | - **Group Chats**: Extend functionality to support group conversations with multiple participants. 43 | - **Message Status**: Add support for message status indicators (e.g., read receipts, message delivered). 44 | - **User Presence**: Implement presence status (e.g., online, offline) for users. 45 | - **Notifications**: Integrate with push notification services to notify users of new messages when they are offline. 46 | 47 | ## Conclusion 48 | 49 | By completing this challenge, you will gain practical experience in developing a Chat Application API and learn essential practices for backend development related to real-time communication and user management. Explore additional improvements and challenges to further enhance your skills. 50 | 51 | Happy coding! 52 | -------------------------------------------------------------------------------- /challenges/junior/api-ecommerce.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Basic E-commerce API 2 | 3 | ## Introduction 4 | 5 | The "Basic E-commerce API" challenge is designed to build a RESTful API that allows basic management of products, orders, and potentially user accounts. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests. 10 | - Implement endpoints for CRUD operations on products and orders. 11 | - Handle user authentication and authorization (optional). 12 | - Understand HTTP methods (GET, POST, PUT, DELETE) and status codes. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a RESTful API that provides functionality for managing products and orders in an e-commerce system. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, C#) and set up the necessary environment. 19 | 20 | 3. **Implementation Details**: 21 | - Define endpoints for products (`/products`) and orders (`/orders`): 22 | - `GET /products`: Retrieve all products. 23 | - `POST /products`: Create a new product. 24 | - `GET /products/{productId}`: Retrieve a specific product by ID. 25 | - `PUT /products/{productId}`: Update an existing product. 26 | - `DELETE /products/{productId}`: Delete a product. 27 | - `GET /orders`: Retrieve all orders. 28 | - `POST /orders`: Create a new order. 29 | - `GET /orders/{orderId}`: Retrieve a specific order by ID. 30 | - `PUT /orders/{orderId}`: Update an existing order (e.g., change status). 31 | - `DELETE /orders/{orderId}`: Cancel an order. 32 | - Implement logic to interact with product and order data (e.g., store in database). 33 | - Optionally, implement user authentication and authorization for managing orders. 34 | 35 | 4. **Testing**: Test your API using a HTTP client (e.g., Postman, curl). 36 | - Send requests to each endpoint (`/products`, `/orders`) with appropriate data payloads (e.g., JSON for creating/updating products, orders). 37 | - Verify that the responses contain the expected data and that status codes are appropriate (e.g., 200 OK, 404 Not Found). 38 | 39 | ### Possible Improvements 40 | 41 | - **Validation**: Implement validation for input data (e.g., required fields, product pricing). 42 | - **Error Handling**: Enhance error messages and responses for invalid requests. 43 | - **Security**: Secure API endpoints, especially those involving user authentication and authorization. 44 | - **Performance**: Optimize database queries and API responses for better performance, especially under high load. 45 | - **Payment Integration**: Integrate with a payment gateway for processing orders. 46 | 47 | ## Conclusion 48 | 49 | By completing this challenge, you will gain practical experience in developing a Basic E-commerce API and learn essential practices for backend development. Explore additional improvements and challenges to further enhance your skills. 50 | 51 | Happy coding! 52 | -------------------------------------------------------------------------------- /challenges/junior/api-event-scheduling.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Event Scheduling API 2 | 3 | ## Introduction 4 | 5 | The "Event Scheduling API" challenge is designed to build a RESTful API that allows management of events, including CRUD operations. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests. 10 | - Implement endpoints for CRUD operations on events. 11 | - Handle event details (e.g., title, description, start/end time). 12 | - Understand HTTP methods (GET, POST, PUT, DELETE) and status codes. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a RESTful API that provides functionality for managing events. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, C#) and set up the necessary environment. 19 | 20 | 3. **Implementation Details**: 21 | - Define endpoints for events (`/events`): 22 | - `GET /events`: Retrieve all events. 23 | - `POST /events`: Create a new event. 24 | - `GET /events/{eventId}`: Retrieve a specific event by ID. 25 | - `PUT /events/{eventId}`: Update an existing event. 26 | - `DELETE /events/{eventId}`: Delete an event. 27 | - Implement logic to interact with event data (e.g., store in database). 28 | - Include fields such as event title, description, start time, end time, and location. 29 | 30 | 4. **Testing**: Test your API using a HTTP client (e.g., Postman, curl). 31 | - Send requests to each endpoint (`/events`) with appropriate data payloads (e.g., JSON for creating/updating events). 32 | - Verify that the responses contain the expected data and that status codes are appropriate (e.g., 200 OK, 404 Not Found). 33 | 34 | ### Possible Improvements 35 | 36 | - **Validation**: Implement validation for input data (e.g., required fields, date/time formats). 37 | - **Error Handling**: Enhance error messages and responses for invalid requests. 38 | - **Timezone Support**: Add support for different timezones when scheduling events. 39 | - **Attendees**: Extend the API to support managing event attendees and RSVPs. 40 | - **Recurrence**: Implement recurring events (e.g., daily, weekly) for more advanced scheduling. 41 | 42 | ## Conclusion 43 | 44 | By completing this challenge, you will gain practical experience in developing an Event Scheduling API and learn essential practices for backend development. Explore additional improvements and challenges to further enhance your skills. 45 | 46 | Happy coding! 47 | -------------------------------------------------------------------------------- /challenges/junior/api-fitness-tracker.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Fitness Tracker API 2 | 3 | ## Introduction 4 | 5 | The "Fitness Tracker API" challenge is designed to build a RESTful API that allows users to track fitness-related data, including activities, workouts, and potentially nutrition. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests. 10 | - Implement endpoints for CRUD operations on user profiles, activities, workouts, and nutrition (optional). 11 | - Handle data related to fitness tracking (e.g., steps, distance, calories burned). 12 | - Understand HTTP methods (GET, POST, PUT, DELETE) and status codes. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a RESTful API that provides functionality for tracking fitness data. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, C#) and set up the necessary environment. 19 | 20 | 3. **Implementation Details**: 21 | - Define endpoints for user profiles (`/users`): 22 | - `GET /users`: Retrieve all user profiles. 23 | - `POST /users`: Create a new user profile. 24 | - `GET /users/{userId}`: Retrieve details about a specific user profile. 25 | - `PUT /users/{userId}`: Update an existing user profile. 26 | - `DELETE /users/{userId}`: Delete a user profile. 27 | 28 | - Define endpoints for activities (`/activities`): 29 | - `GET /activities`: Retrieve all activities. 30 | - `POST /activities`: Log a new activity (e.g., running, cycling). 31 | - `GET /activities/{activityId}`: Retrieve details about a specific activity. 32 | - `PUT /activities/{activityId}`: Update an existing activity. 33 | - `DELETE /activities/{activityId}`: Delete an activity. 34 | 35 | - Define endpoints for workouts (`/workouts`): 36 | - `GET /workouts`: Retrieve all workouts. 37 | - `POST /workouts`: Log a new workout session (e.g., gym session, yoga class). 38 | - `GET /workouts/{workoutId}`: Retrieve details about a specific workout. 39 | - `PUT /workouts/{workoutId}`: Update an existing workout. 40 | - `DELETE /workouts/{workoutId}`: Delete a workout. 41 | 42 | - Define endpoints for nutrition (`/nutrition`): 43 | - `GET /nutrition`: Retrieve nutrition logs. 44 | - `POST /nutrition`: Log nutrition intake (optional). 45 | - `GET /nutrition/{nutritionId}`: Retrieve details about a specific nutrition log. 46 | - `PUT /nutrition/{nutritionId}`: Update an existing nutrition log. 47 | - `DELETE /nutrition/{nutritionId}`: Delete a nutrition log. 48 | - Implement logic to interact with user profile, activity, workout, and nutrition data (e.g., store in database, calculate statistics). 49 | - Include fields such as user information, activity type, workout details, nutrition intake, and associated metrics. 50 | 51 | 4. **Testing**: Test your API using a HTTP client (e.g., Postman, curl). 52 | - Send requests to each endpoint (`/users`, `/activities`, `/workouts`, `/nutrition`) with appropriate data payloads (e.g., JSON for creating/updating user profiles, activities, workouts). 53 | - Verify that the responses contain the expected data and that status codes are appropriate (e.g., 200 OK, 404 Not Found). 54 | 55 | ### Possible Improvements 56 | 57 | - **Fitness Metrics**: Implement functionality to calculate and store fitness metrics (e.g., calories burned, distance covered). 58 | - **Dashboard**: Create a user dashboard to visualize fitness progress and statistics. 59 | - **Integration**: Integrate with fitness tracking devices or apps to automatically log activities and workouts. 60 | - **Authentication**: Secure API endpoints, especially those involving user profiles or sensitive fitness data. 61 | - **Goal Tracking**: Add support for users to set and track fitness goals (e.g., weight loss, muscle gain). 62 | 63 | ## Conclusion 64 | 65 | By completing this challenge, you will gain practical experience in developing a Fitness Tracker API and learn essential practices for backend development in the context of health and fitness applications. Explore additional improvements and challenges to further enhance your skills. 66 | 67 | Happy coding! 68 | -------------------------------------------------------------------------------- /challenges/junior/api-forum.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Forum API 2 | 3 | ## Introduction 4 | 5 | The "Forum API" challenge is designed to build a RESTful API that allows management of forums, threads, posts, and potentially user accounts. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests. 10 | - Implement endpoints for CRUD operations on forums, threads, and posts. 11 | - Handle user authentication and authorization (optional). 12 | - Understand HTTP methods (GET, POST, PUT, DELETE) and status codes. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a RESTful API that provides functionality for managing forums, threads, and posts. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, C#) and set up the necessary environment. 19 | 20 | 3. **Implementation Details**: 21 | - Define endpoints for forums (`/forums`), threads (`/forums/{forumId}/threads`), and posts (`/threads/{threadId}/posts`): 22 | - `GET /forums`: Retrieve all forums. 23 | - `POST /forums`: Create a new forum. 24 | - `GET /forums/{forumId}`: Retrieve details about a specific forum. 25 | - `PUT /forums/{forumId}`: Update an existing forum. 26 | - `DELETE /forums/{forumId}`: Delete a forum. 27 | - `GET /forums/{forumId}/threads`: Retrieve all threads in a forum. 28 | - `POST /forums/{forumId}/threads`: Create a new thread in a forum. 29 | - `GET /threads/{threadId}`: Retrieve details about a specific thread. 30 | - `PUT /threads/{threadId}`: Update an existing thread. 31 | - `DELETE /threads/{threadId}`: Delete a thread. 32 | - `GET /threads/{threadId}/posts`: Retrieve all posts in a thread. 33 | - `POST /threads/{threadId}/posts`: Create a new post in a thread. 34 | - `GET /posts/{postId}`: Retrieve details about a specific post. 35 | - `PUT /posts/{postId}`: Update an existing post. 36 | - `DELETE /posts/{postId}`: Delete a post. 37 | - Implement logic to interact with forum, thread, and post data (e.g., store in database). 38 | - Include fields such as forum title, thread subject, post content, and user associations. 39 | 40 | 4. **Testing**: Test your API using a HTTP client (e.g., Postman, curl). 41 | - Send requests to each endpoint (`/forums`, `/forums/{forumId}/threads`, `/threads/{threadId}/posts`) with appropriate data payloads (e.g., JSON for creating/updating forums, threads, posts). 42 | - Verify that the responses contain the expected data and that status codes are appropriate (e.g., 200 OK, 404 Not Found). 43 | 44 | ### Possible Improvements 45 | 46 | - **Pagination**: Implement pagination for listing forums, threads, and posts. 47 | - **Error Handling**: Enhance error messages and responses for invalid requests or when data is not found. 48 | - **Authentication**: Secure API endpoints, especially those involving user operations like creating, updating, or deleting forums, threads, or posts. 49 | - **Search Functionality**: Implement search functionality to allow users to search for forums, threads, or posts by title or content. 50 | - **Notifications**: Add support for notifications when new posts are added to subscribed threads. 51 | 52 | ## Conclusion 53 | 54 | By completing this challenge, you will gain practical experience in developing a Forum API and learn essential practices for backend development. Explore additional improvements and challenges to further enhance your skills. 55 | 56 | Happy coding! 57 | -------------------------------------------------------------------------------- /challenges/junior/api-inventory-management.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Inventory Management API 2 | 3 | ## Introduction 4 | 5 | The "Inventory Management API" challenge is designed to build a RESTful API that allows management of products, categories, orders, and potentially user accounts. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests. 10 | - Implement endpoints for CRUD operations on products, categories, and orders. 11 | - Handle inventory management (e.g., stock tracking, order fulfillment). 12 | - Understand HTTP methods (GET, POST, PUT, DELETE) and status codes. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a RESTful API that provides functionality for managing inventory. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, C#) and set up the necessary environment. 19 | 20 | 3. **Implementation Details**: 21 | - Define endpoints for products (`/products`), categories (`/categories`), and orders (`/orders`): 22 | - `GET /products`: Retrieve all products. 23 | - `POST /products`: Create a new product. 24 | - `GET /products/{productId}`: Retrieve details about a specific product. 25 | - `PUT /products/{productId}`: Update an existing product. 26 | - `DELETE /products/{productId}`: Delete a product. 27 | - `GET /categories`: Retrieve all categories. 28 | - `POST /categories`: Create a new category. 29 | - `GET /categories/{categoryId}`: Retrieve details about a specific category. 30 | - `PUT /categories/{categoryId}`: Update an existing category. 31 | - `DELETE /categories/{categoryId}`: Delete a category. 32 | - `GET /orders`: Retrieve all orders. 33 | - `POST /orders`: Create a new order. 34 | - `GET /orders/{orderId}`: Retrieve details about a specific order. 35 | - `PUT /orders/{orderId}`: Update an existing order (e.g., change order status). 36 | - `DELETE /orders/{orderId}`: Cancel an order. 37 | - Implement logic to interact with product, category, and order data (e.g., store in database, manage stock levels). 38 | - Include fields such as product name, description, price, category associations, and order details. 39 | 40 | 4. **Testing**: Test your API using a HTTP client (e.g., Postman, curl). 41 | - Send requests to each endpoint (`/products`, `/categories`, `/orders`) with appropriate data payloads (e.g., JSON for creating/updating products, categories, orders). 42 | - Verify that the responses contain the expected data and that status codes are appropriate (e.g., 200 OK, 404 Not Found). 43 | 44 | ### Possible Improvements 45 | 46 | - **Inventory Management**: Implement functionality for tracking stock levels, managing inventory, and handling order fulfillment. 47 | - **Authentication**: Secure API endpoints, especially those involving sensitive operations like creating, updating, or deleting products, categories, or orders. 48 | - **Error Handling**: Enhance error messages and responses for invalid requests or when data is not found. 49 | - **Reporting**: Add support for generating reports on inventory levels, sales, and orders. 50 | - **Integration**: Integrate with payment gateways for processing orders and handling payments. 51 | 52 | ## Conclusion 53 | 54 | By completing this challenge, you will gain practical experience in developing an Inventory Management API and learn essential practices for backend development. Explore additional improvements and challenges to further enhance your skills. 55 | 56 | Happy coding! 57 | -------------------------------------------------------------------------------- /challenges/junior/api-movies.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Movie Database API 2 | 3 | ## Introduction 4 | 5 | The "Movie Database API" challenge is designed to build a RESTful API that provides access to movie information, including details about movies, actors, directors, and reviews. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests. 10 | - Implement endpoints for retrieving movie details, actors, directors, and reviews. 11 | - Understand HTTP methods (GET, POST, PUT, DELETE) and status codes. 12 | - Integrate with a movie database or API provider (e.g., IMDb, The Movie Database). 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a RESTful API that provides functionality for accessing movie information. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, C#) and set up the necessary environment. 19 | 20 | 3. **Implementation Details**: 21 | - Define endpoints for movie information (`/movies`), actors (`/actors`), directors (`/directors`), and reviews (`/movies/{movieId}/reviews`): 22 | - `GET /movies`: Retrieve a list of movies. 23 | - `GET /movies/{movieId}`: Retrieve details about a specific movie. 24 | - `GET /actors`: Retrieve a list of actors. 25 | - `GET /actors/{actorId}`: Retrieve details about a specific actor. 26 | - `GET /directors`: Retrieve a list of directors. 27 | - `GET /directors/{directorId}`: Retrieve details about a specific director. 28 | - `GET /movies/{movieId}/reviews`: Retrieve reviews for a specific movie. 29 | - Integrate with a movie database or API provider to fetch movie data. 30 | - Parse the response from the movie database or API provider and return relevant information as JSON. 31 | 32 | 4. **Testing**: Test your API using a HTTP client (e.g., Postman, curl). 33 | - Send requests to each endpoint (`/movies`, `/actors`, `/directors`, `/movies/{movieId}/reviews`) to retrieve movie data. 34 | - Verify that the responses contain the expected data and that status codes are appropriate (e.g., 200 OK). 35 | 36 | ### Possible Improvements 37 | 38 | - **Search Functionality**: Implement search functionality to allow users to search for movies by title, actors, or genres. 39 | - **Pagination**: Implement pagination for listing movies, actors, and directors. 40 | - **Error Handling**: Enhance error messages and responses for invalid requests or when movie data is not found. 41 | - **Additional Movie Data**: Extend the API to include additional movie data such as trailers, ratings, and production details. 42 | 43 | ## Conclusion 44 | 45 | By completing this challenge, you will gain practical experience in developing a Movie Database API and learn essential practices for backend development. Explore additional improvements and challenges to further enhance your skills. 46 | 47 | Happy coding! 48 | -------------------------------------------------------------------------------- /challenges/junior/api-recipe.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Recipe API 2 | 3 | ## Introduction 4 | 5 | The "Recipe API" challenge is designed to build a RESTful API that allows management of recipes, including CRUD operations for recipes, ingredients, and categories. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests. 10 | - Implement endpoints for CRUD operations on recipes, ingredients, and categories. 11 | - Handle recipe details (e.g., title, description, ingredients, instructions). 12 | - Understand HTTP methods (GET, POST, PUT, DELETE) and status codes. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a RESTful API that provides functionality for managing recipes. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, C#) and set up the necessary environment. 19 | 20 | 3. **Implementation Details**: 21 | - Define endpoints for recipes (`/recipes`), ingredients (`/ingredients`), and categories (`/categories`): 22 | - `GET /recipes`: Retrieve all recipes. 23 | - `POST /recipes`: Create a new recipe. 24 | - `GET /recipes/{recipeId}`: Retrieve details about a specific recipe. 25 | - `PUT /recipes/{recipeId}`: Update an existing recipe. 26 | - `DELETE /recipes/{recipeId}`: Delete a recipe. 27 | - `GET /ingredients`: Retrieve all ingredients. 28 | - `POST /ingredients`: Create a new ingredient. 29 | - `GET /ingredients/{ingredientId}`: Retrieve details about a specific ingredient. 30 | - `PUT /ingredients/{ingredientId}`: Update an existing ingredient. 31 | - `DELETE /ingredients/{ingredientId}`: Delete an ingredient. 32 | - `GET /categories`: Retrieve all categories. 33 | - `POST /categories`: Create a new category. 34 | - `GET /categories/{categoryId}`: Retrieve details about a specific category. 35 | - `PUT /categories/{categoryId}`: Update an existing category. 36 | - `DELETE /categories/{categoryId}`: Delete a category. 37 | - Implement logic to interact with recipe, ingredient, and category data (e.g., store in database). 38 | - Include fields such as recipe title, description, ingredients list, instructions, and category associations. 39 | 40 | 4. **Testing**: Test your API using a HTTP client (e.g., Postman, curl). 41 | - Send requests to each endpoint (`/recipes`, `/ingredients`, `/categories`) with appropriate data payloads (e.g., JSON for creating/updating recipes, ingredients, categories). 42 | - Verify that the responses contain the expected data and that status codes are appropriate (e.g., 200 OK, 404 Not Found). 43 | 44 | ### Possible Improvements 45 | 46 | - **Search Functionality**: Implement search functionality to allow users to search for recipes by title, ingredients, or categories. 47 | - **Pagination**: Implement pagination for listing recipes, ingredients, and categories. 48 | - **Error Handling**: Enhance error messages and responses for invalid requests or when data is not found. 49 | - **Authentication**: Secure API endpoints, especially those involving sensitive operations like creating, updating, or deleting recipes. 50 | - **Unit Tests**: Write unit tests to validate API functionality and data interactions. 51 | 52 | ## Conclusion 53 | 54 | By completing this challenge, you will gain practical experience in developing a Recipe API and learn essential practices for backend development. Explore additional improvements and challenges to further enhance your skills. 55 | 56 | Happy coding! 57 | -------------------------------------------------------------------------------- /challenges/junior/api-task-management.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Task Management API 2 | 3 | ## Introduction 4 | 5 | The "Task Management API" challenge is designed to build a RESTful API that allows management of tasks, including CRUD operations. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests. 10 | - Implement endpoints for CRUD operations on tasks. 11 | - Handle task statuses (e.g., pending, completed). 12 | - Understand HTTP methods (GET, POST, PUT, DELETE) and status codes. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a RESTful API that provides functionality for managing tasks. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, C#) and set up the necessary environment. 19 | 20 | 3. **Implementation Details**: 21 | - Define endpoints for tasks (`/tasks`): 22 | - `GET /tasks`: Retrieve all tasks. 23 | - `POST /tasks`: Create a new task. 24 | - `GET /tasks/{taskId}`: Retrieve a specific task by ID. 25 | - `PUT /tasks/{taskId}`: Update an existing task. 26 | - `DELETE /tasks/{taskId}`: Delete a task. 27 | - Implement logic to interact with task data (e.g., store in database). 28 | - Include fields such as task name, description, status, and due date. 29 | 30 | 4. **Testing**: Test your API using a HTTP client (e.g., Postman, curl). 31 | - Send requests to each endpoint (`/tasks`) with appropriate data payloads (e.g., JSON for creating/updating tasks). 32 | - Verify that the responses contain the expected data and that status codes are appropriate (e.g., 200 OK, 404 Not Found). 33 | 34 | ### Possible Improvements 35 | 36 | - **Validation**: Implement validation for input data (e.g., required fields, date formats). 37 | - **Error Handling**: Enhance error messages and responses for invalid requests. 38 | - **Pagination**: Implement pagination for listing tasks, especially if the number of tasks grows. 39 | - **Task Assignments**: Extend the API to support assigning tasks to users. 40 | - **Reminders**: Implement reminder functionality for tasks with due dates. 41 | 42 | ## Conclusion 43 | 44 | By completing this challenge, you will gain practical experience in developing a Task Management API and learn essential practices for backend development. Explore additional improvements and challenges to further enhance your skills. 45 | 46 | Happy coding! 47 | -------------------------------------------------------------------------------- /challenges/junior/api-user-profile.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - User Profile API 2 | 3 | ## Introduction 4 | 5 | The "User Profile API" challenge is designed to build a REST API that allows basic management of user profiles, including creation, retrieval, updating, and deletion. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests. 10 | - Implement endpoints for CRUD operations on user profiles. 11 | - Store user profile data (e.g., username, email, bio) persistently. 12 | - Understand HTTP methods (GET, POST, PUT, DELETE) and status codes. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a REST API that provides functionality for managing user profiles. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, C#) and set up the necessary environment. 19 | 20 | 3. **Implementation Details**: 21 | - Define endpoints for user profiles (`/profiles`): 22 | - `GET /profiles`: Retrieve all user profiles. 23 | - `POST /profiles`: Create a new user profile. 24 | - `GET /profiles/{userId}`: Retrieve a specific user profile by ID. 25 | - `PUT /profiles/{userId}`: Update an existing user profile. 26 | - `DELETE /profiles/{userId}`: Delete a user profile. 27 | - Implement logic to interact with user profile data (e.g., store in database). 28 | - Handle basic fields such as username, email, and bio for each user profile. 29 | 30 | 4. **Testing**: Test your API using a HTTP client (e.g., Postman, curl). 31 | - Send requests to each endpoint (`/profiles`) with appropriate data payloads (e.g., JSON for creating/updating user profiles). 32 | - Verify that the responses contain the expected data and that status codes are appropriate (e.g., 200 OK, 404 Not Found). 33 | 34 | ### Possible Improvements 35 | 36 | - **Validation**: Implement validation for input data (e.g., email format, required fields). 37 | - **Error Handling**: Enhance error messages and responses for invalid requests. 38 | - **Security**: Consider security measures such as input sanitization and preventing SQL injection. 39 | - **Pagination**: Implement pagination for listing user profiles, especially if the number of profiles grows. 40 | - **Performance**: Optimize database queries and API responses for better performance. 41 | 42 | ## Conclusion 43 | 44 | By completing this challenge, you will gain practical experience in developing a User Profile API and learn essential practices for backend development. Explore additional improvements and challenges to further enhance your skills. 45 | 46 | Happy coding! 47 | -------------------------------------------------------------------------------- /challenges/junior/cd-deployment-pipeline.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - CD Deployment Pipeline 2 | 3 | ## Introduction 4 | 5 | The "CD Deployment Pipeline" challenge is designed to help you create a Continuous Deployment (CD) pipeline for automatically deploying applications. This pipeline ensures that your application is automatically deployed to a production or staging environment, facilitating a smooth and efficient release process. 6 | 7 | ### Objectives 8 | 9 | - Understand the principles of Continuous Deployment and its benefits. 10 | - Create a CD pipeline configuration file to automate the deployment process. 11 | - Integrate with a CD platform (e.g., GitHub Actions, GitLab CI, Jenkins) for automated deployment. 12 | - Validate that the pipeline successfully deploys the application and handles deployment tasks effectively. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Create a CD pipeline that automates the deployment of your application to a production or staging environment. 17 | 18 | 2. **Environment Setup**: 19 | - Choose a CD platform (e.g., GitHub Actions, GitLab CI, Jenkins) and set up an account if needed. 20 | - Prepare a deployment environment (e.g., cloud service, on-premises server) where your application will be deployed. 21 | 22 | 3. **Implementation Details**: 23 | - **For GitHub Actions**: 24 | - Create a `.github/workflows` directory in your project. 25 | - Add a YAML file for the CD pipeline configuration (e.g., `cd-deploy.yml`). 26 | - [GitHub Actions Documentation](https://docs.github.com/en/actions) provides guidance on creating workflows. 27 | - [Example GitHub Actions Deployment](https://github.com/actions/starter-workflows/blob/main/operations/deploy-to-azure-web-apps.yml) demonstrates setting up a deployment pipeline for Azure Web Apps. 28 | - **For GitLab CI**: 29 | - Create a `.gitlab-ci.yml` file in the root directory of your project. 30 | - [GitLab CI/CD Documentation](https://docs.gitlab.com/ee/ci/) offers details on setting up deployment pipelines. 31 | - [Example GitLab CI Deployment](https://docs.gitlab.com/ee/ci/examples/deploying_to_kubernetes.html) shows how to configure deployment to Kubernetes. 32 | - **For Jenkins**: 33 | - Create a `Jenkinsfile` in the root directory of your project. 34 | - [Jenkins Pipeline Documentation](https://www.jenkins.io/doc/book/pipeline/) covers creating and managing Jenkins pipelines. 35 | - [Example Jenkinsfile Deployment](https://www.jenkins.io/doc/book/pipeline/syntax/#deploy) provides examples of deployment stages. 36 | 37 | 4. **Testing**: 38 | - Commit your CD pipeline configuration file to your repository and push it to the remote repository. 39 | - Verify that the CD pipeline is triggered by making changes and observing the deployment logs on your CD platform’s interface. 40 | - Ensure that the pipeline correctly deploys the application to the target environment and performs necessary deployment tasks. 41 | 42 | ### Possible Improvements 43 | 44 | - **Rollback Mechanism**: Implement a rollback strategy to revert to a previous version in case of deployment failure. 45 | - **Automated Rollout**: Configure strategies for canary releases or blue-green deployments to minimize downtime. 46 | - **Post-Deployment Testing**: Add stages for post-deployment verification and smoke tests to ensure the application is functioning as expected. 47 | - **Environment-Specific Configurations**: Manage and apply different configurations for staging and production environments. 48 | - **Security Checks**: Include security scans or checks in the deployment pipeline to ensure the deployed application is secure. 49 | 50 | ## Conclusion 51 | 52 | By completing this challenge, you will gain practical experience in setting up a Continuous Deployment pipeline, automating the deployment of applications, and ensuring that your deployment process is efficient and reliable. This skill is essential for modern development workflows and continuous delivery practices. Explore additional improvements and challenges to further enhance your skills. 53 | 54 | Happy coding! 55 | -------------------------------------------------------------------------------- /challenges/junior/cd-setup-pipeline.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - CD Setup Pipeline 2 | 3 | ## Introduction 4 | 5 | The "CD Setup Pipeline" challenge is designed to help you create a Continuous Deployment (CD) pipeline for automatically deploying applications. This pipeline ensures that changes to your application are automatically deployed to a staging or production environment, streamlining the release process. 6 | 7 | ### Objectives 8 | 9 | - Understand the basics of Continuous Deployment and its benefits. 10 | - Create a CD pipeline configuration file to automate the deployment process. 11 | - Integrate with a CD platform (e.g., GitHub Actions, GitLab CI, Jenkins) to manage deployments. 12 | - Validate that the pipeline deploys the application correctly and handles deployment processes. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Create a CD pipeline that automates the deployment of your application. 17 | 18 | 2. **Environment Setup**: 19 | - Choose a CD platform (e.g., GitHub Actions, GitLab CI, Jenkins) and set up an account if you don’t have one. 20 | - Set up a deployment environment (e.g., cloud service, on-premises server) for your application. 21 | 22 | 3. **Implementation Details**: 23 | - **For GitHub Actions**: 24 | - Create a `.github/workflows` directory in your project. 25 | - Add a YAML file for the CD pipeline configuration (e.g., `cd-deploy.yml`). 26 | - [GitHub Actions Documentation](https://docs.github.com/en/actions) provides guidance on creating workflows. 27 | - [Example GitHub Actions Deployment](https://github.com/actions/starter-workflows/blob/main/operations/deploy-to-azure-web-apps.yml) demonstrates setting up a deployment pipeline. 28 | - **For GitLab CI**: 29 | - Create a `.gitlab-ci.yml` file in the root directory of your project. 30 | - [GitLab CI/CD Documentation](https://docs.gitlab.com/ee/ci/) offers details on setting up deployment pipelines. 31 | - [Example GitLab CI Deployment](https://docs.gitlab.com/ee/ci/examples/deploying_to_kubernetes.html) shows how to configure deployment to Kubernetes. 32 | - **For Jenkins**: 33 | - Create a `Jenkinsfile` in the root directory of your project. 34 | - [Jenkins Pipeline Documentation](https://www.jenkins.io/doc/book/pipeline/) covers creating and managing Jenkins pipelines. 35 | - [Example Jenkinsfile Deployment](https://www.jenkins.io/doc/book/pipeline/syntax/#deploy) provides examples of deployment stages. 36 | 37 | 4. **Testing**: 38 | - Commit your CD pipeline configuration file to your repository and push it to the remote repository. 39 | - Verify that the CD pipeline is triggered and observe the deployment logs on your CD platform’s interface. 40 | - Ensure that the pipeline correctly deploys the application and handles deployment tasks. 41 | 42 | ### Possible Improvements 43 | 44 | - **Rollback Mechanism**: Implement a rollback strategy to revert to a previous version in case of deployment failure. 45 | - **Automated Rollout**: Configure strategies for canary releases or blue-green deployments to minimize downtime. 46 | - **Post-Deployment Testing**: Add stages for post-deployment verification and smoke tests to ensure the application is running correctly. 47 | - **Environment-Specific Configurations**: Manage different configurations for staging and production environments. 48 | - **Security Checks**: Include security scans or checks in the deployment pipeline to ensure the application is secure. 49 | 50 | ## Conclusion 51 | 52 | By completing this challenge, you will gain practical experience in setting up a Continuous Deployment pipeline, automating the deployment process, and ensuring that your application is consistently and reliably released. This skill is crucial for efficient deployment workflows and maintaining application quality. Explore additional improvements and challenges to further enhance your skills. 53 | 54 | Happy coding! 55 | -------------------------------------------------------------------------------- /challenges/junior/ci-build-pipeline.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - CI Build Pipeline 2 | 3 | ## Introduction 4 | 5 | The "CI Build Pipeline" challenge is designed to help you create a Continuous Integration (CI) pipeline specifically for building applications. This pipeline automates the build process, ensuring that your application is consistently and correctly built each time code changes are made. 6 | 7 | ### Objectives 8 | 9 | - Understand the basics of Continuous Integration and its role in automating builds. 10 | - Create a CI pipeline configuration file to automate the build process. 11 | - Integrate with a CI platform (e.g., GitHub Actions, GitLab CI, Jenkins) to manage builds. 12 | - Validate that the pipeline successfully builds the application and handles build tasks. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Create a CI pipeline that automates the build process for your application. 17 | 18 | 2. **Environment Setup**: 19 | - Choose a CI platform (e.g., GitHub Actions, GitLab CI, Jenkins) and set up an account if needed. 20 | - Prepare a build environment that matches the requirements of your application. 21 | 22 | 3. **Implementation Details**: 23 | - **For GitHub Actions**: 24 | - Create a `.github/workflows` directory in your project. 25 | - Add a YAML file for the CI pipeline configuration (e.g., `ci-build.yml`). 26 | - [GitHub Actions Documentation](https://docs.github.com/en/actions) provides guidance on creating workflows. 27 | - [Example GitHub Actions Build Workflow](https://github.com/actions/starter-workflows/blob/main/ci/java-maven.yml) demonstrates setting up a build pipeline for a Java Maven application. 28 | - **For GitLab CI**: 29 | - Create a `.gitlab-ci.yml` file in the root directory of your project. 30 | - [GitLab CI/CD Documentation](https://docs.gitlab.com/ee/ci/) offers details on setting up build pipelines. 31 | - [Example GitLab CI Build](https://docs.gitlab.com/ee/ci/examples/java.html) shows how to configure a build pipeline for a Java application. 32 | - **For Jenkins**: 33 | - Create a `Jenkinsfile` in the root directory of your project. 34 | - [Jenkins Pipeline Documentation](https://www.jenkins.io/doc/book/pipeline/) covers creating and managing Jenkins pipelines. 35 | - [Example Jenkinsfile Build](https://www.jenkins.io/doc/book/pipeline/syntax/#build) provides examples of build stages for various types of projects. 36 | 37 | 4. **Testing**: 38 | - Commit your CI pipeline configuration file to your repository and push it to the remote repository. 39 | - Verify that the CI pipeline is triggered by making changes and observing the build logs on your CI platform’s interface. 40 | - Ensure that the pipeline correctly builds the application and handles any build tasks or dependencies. 41 | 42 | ### Possible Improvements 43 | 44 | - **Dependency Management**: Add stages to manage and cache dependencies to speed up the build process. 45 | - **Build Artifacts**: Configure the pipeline to store build artifacts (e.g., JAR files, binaries) for later use. 46 | - **Parallel Builds**: Set up parallel builds to improve build times for larger projects. 47 | - **Versioning**: Implement versioning strategies to tag build artifacts with version numbers or build IDs. 48 | - **Notifications**: Set up notifications to alert you of build results or failures. 49 | 50 | ## Conclusion 51 | 52 | By completing this challenge, you will gain practical experience in setting up a Continuous Integration pipeline focused on building applications. This is an essential skill for automating and streamlining your development process, ensuring that your application is consistently built and ready for further stages of development. Explore additional improvements and challenges to further enhance your skills. 53 | 54 | Happy coding! 55 | -------------------------------------------------------------------------------- /challenges/junior/ci-build-testing-pipeline.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - CI Build and Testing Pipeline 2 | 3 | ## Introduction 4 | 5 | The "CI Build and Testing Pipeline" challenge is designed to help you create a Continuous Integration (CI) pipeline that integrates both build and testing stages. This pipeline ensures that your application is both built and tested automatically, providing a robust workflow for maintaining code quality. 6 | 7 | ### Objectives 8 | 9 | - Understand the integration of build and testing stages in a CI pipeline. 10 | - Create a CI pipeline configuration file that combines build and test processes. 11 | - Integrate with a CI/CD platform (e.g., GitHub Actions, GitLab CI, Jenkins) to automate both stages. 12 | - Validate that the pipeline successfully builds and tests the application. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Create a CI pipeline that automates the build and testing process for your application. 17 | 18 | 2. **Environment Setup**: 19 | - Choose a CI/CD platform (e.g., GitHub Actions, GitLab CI, Jenkins) and set up an account if you don’t have one. 20 | - Choose a sample application or project with build and test requirements. 21 | 22 | 3. **Implementation Details**: 23 | - **For GitHub Actions**: 24 | - Create a `.github/workflows` directory in your project. 25 | - Add a YAML file for the CI pipeline configuration (e.g., `ci-build-test.yml`). 26 | - [GitHub Actions Documentation](https://docs.github.com/en/actions) provides guidance on creating workflows. 27 | - [Example GitHub Actions CI for Node.js](https://github.com/actions/starter-workflows/blob/main/ci/node.js.yml) demonstrates setting up a pipeline with build and test stages. 28 | - **For GitLab CI**: 29 | - Create a `.gitlab-ci.yml` file in the root directory of your project. 30 | - [GitLab CI/CD Documentation](https://docs.gitlab.com/ee/ci/) offers details on setting up CI pipelines. 31 | - [Example GitLab CI for Python with Build and Test Stages](https://docs.gitlab.com/ee/ci/examples/python.html) shows how to configure build and test stages for Python projects. 32 | - **For Jenkins**: 33 | - Create a `Jenkinsfile` in the root directory of your project. 34 | - [Jenkins Pipeline Documentation](https://www.jenkins.io/doc/book/pipeline/) covers creating and managing Jenkins pipelines. 35 | - [Example Jenkinsfile for Java with Build and Test](https://www.jenkins.io/doc/book/pipeline/examples/) provides an example of a pipeline that includes build and test stages for Java projects. 36 | 37 | 4. **Testing**: 38 | - Commit your CI pipeline configuration file to your repository and push it to the remote repository. 39 | - Verify that the CI pipeline is triggered and observe the build and test logs on your CI/CD platform’s interface. 40 | - Ensure that the pipeline performs the build and test stages correctly and reports any failures or errors. 41 | 42 | ### Possible Improvements 43 | 44 | - **Deployment Integration**: Extend the pipeline to include deployment steps after successful build and tests. 45 | - **Code Quality Checks**: Add stages for linting, static code analysis, or security scans to ensure code quality. 46 | - **Parallel Build and Test**: Configure parallel execution to speed up the build and test process. 47 | - **Test Coverage Reports**: Include stages for measuring and reporting test coverage. 48 | - **Notifications**: Set up notifications to alert you of build and test results or failures. 49 | 50 | ## Conclusion 51 | 52 | By completing this challenge, you will gain practical experience in setting up a Continuous Integration pipeline that integrates both build and testing stages. This is a crucial skill for automating and streamlining your development workflow, ensuring that your application is continuously validated for quality. Explore additional improvements and challenges to further enhance your skills. 53 | 54 | Happy coding! 55 | -------------------------------------------------------------------------------- /challenges/junior/ci-cd.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - CI/CD 2 | 3 | ## Introduction 4 | 5 | The "CI/CD" challenge is designed to set up a Continuous Integration and Continuous Deployment pipeline for a backend application, ensuring automated testing, building, and deployment. 6 | 7 | ### Objectives 8 | 9 | - Understand the basics of CI/CD. 10 | - Set up automated testing and building for a backend application. 11 | - Implement deployment to a staging or production environment. 12 | 13 | ### Instructions 14 | 15 | 1. **Objective**: Develop a CI/CD pipeline for a backend application, including automated testing, building, and deployment. 16 | 17 | 2. **Environment Setup**: Choose a CI/CD tool (e.g., Jenkins, GitHub Actions, GitLab CI, Travis CI) and set up the necessary environment. 18 | 19 | 3. **Implementation Details**: 20 | - **Repository Setup**: 21 | - Create a repository for your backend application on a version control platform (e.g., GitHub, GitLab). 22 | - Ensure the repository contains the necessary configuration files (e.g., Dockerfile, application code, test scripts). 23 | - **CI Configuration**: 24 | - Set up automated testing to run on each commit or pull request. 25 | - Configure the CI tool to build the application (e.g., compile code, create Docker images). 26 | - **CD Configuration**: 27 | - Set up deployment to a staging environment upon successful build and test. 28 | - Configure deployment to a production environment, possibly with manual approval. 29 | - **Testing and Validation**: 30 | - Ensure the pipeline runs successfully on each code change. 31 | - Validate that the application is correctly deployed and running in the target environment. 32 | 33 | 4. **Testing**: 34 | - **Automated Testing**: Ensure that all tests pass during the CI phase. 35 | - **Manual Testing**: Perform manual testing on the staging environment to validate the deployment. 36 | 37 | ### Possible Improvements 38 | 39 | - **Advanced Testing**: Implement additional testing stages, such as integration tests and load tests. 40 | - **Security Scanning**: Integrate security scanning tools to check for vulnerabilities in the codebase and dependencies. 41 | - **Notifications**: Set up notifications (e.g., Slack, email) for build and deployment status. 42 | - **Rollback Strategy**: Implement a rollback strategy in case of deployment failures. 43 | - **Multi-Environment Deployment**: Extend the pipeline to handle multiple environments (e.g., development, staging, production). 44 | 45 | ## Conclusion 46 | 47 | By completing this challenge, you will gain practical experience in setting up a CI/CD pipeline and learn essential practices for automated testing, building, and deployment. Explore additional improvements and challenges to further enhance your skills. 48 | 49 | Happy coding! 50 | -------------------------------------------------------------------------------- /challenges/junior/ci-testing-pipeline.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - CI Testing Pipeline 2 | 3 | ## Introduction 4 | 5 | The "CI Testing Pipeline" challenge is designed to help you create a Continuous Integration (CI) pipeline that focuses specifically on testing applications. This pipeline automates the testing process to ensure that code changes do not introduce bugs and meet quality standards. 6 | 7 | ### Objectives 8 | 9 | - Understand the basics of Continuous Integration and the importance of automated testing. 10 | - Create a CI pipeline configuration file that automates testing processes. 11 | - Integrate with a CI/CD platform (e.g., GitHub Actions, GitLab CI, Jenkins) to run tests automatically. 12 | - Validate that the pipeline runs tests correctly and reports results. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Create a CI pipeline that automates the testing process for your application. 17 | 18 | 2. **Environment Setup**: 19 | - Choose a CI/CD platform (e.g., GitHub Actions, GitLab CI, Jenkins) and set up an account if you don’t have one. 20 | - Choose a sample application or project with existing tests (e.g., unit tests, integration tests). 21 | 22 | 3. **Implementation Details**: 23 | - **For GitHub Actions**: 24 | - Create a `.github/workflows` directory in your project. 25 | - Add a YAML file for the CI pipeline configuration. 26 | - [GitHub Actions Documentation](https://docs.github.com/en/actions) provides guidance on creating workflows. 27 | - [Example GitHub Actions CI for Node.js](https://github.com/actions/starter-workflows/blob/main/ci/node.js.yml) demonstrates setting up CI for Node.js applications. 28 | - **For GitLab CI**: 29 | - Create a `.gitlab-ci.yml` file in the root directory of your project. 30 | - [GitLab CI/CD Documentation](https://docs.gitlab.com/ee/ci/) offers details on setting up CI pipelines. 31 | - [Example GitLab CI for Python](https://docs.gitlab.com/ee/ci/examples/python.html) shows how to configure testing for Python projects. 32 | - **For Jenkins**: 33 | - Create a `Jenkinsfile` in the root directory of your project. 34 | - [Jenkins Pipeline Documentation](https://www.jenkins.io/doc/book/pipeline/) covers creating and managing Jenkins pipelines. 35 | - [Example Jenkinsfile for Java](https://www.jenkins.io/doc/book/pipeline/examples/) provides an example of running tests in a Java project. 36 | 37 | 4. **Testing**: 38 | - Commit your CI pipeline configuration file to your repository and push it to the remote repository. 39 | - Verify that the CI pipeline is triggered and observe the build logs and test results on your CI/CD platform’s interface. 40 | - Ensure that the pipeline correctly runs the tests and reports any failures or errors. 41 | 42 | ### Possible Improvements 43 | 44 | - **Test Coverage**: Add stages to measure and report test coverage. [Coverage.py Documentation](https://coverage.readthedocs.io/en/latest/) and [JaCoCo Documentation](https://www.jacoco.org/jacoco/trunk/doc/) provide information on coverage tools. 45 | - **Parallel Testing**: Configure parallel test execution to speed up the testing process. [GitHub Actions Parallel Jobs](https://docs.github.com/en/actions/using-jobs/using-job-dependencies) and [GitLab CI Parallel Jobs](https://docs.gitlab.com/ee/ci/yaml/#parallel) offer guidance on parallelism. 46 | - **Notifications**: Set up notifications for test results or failures. [GitHub Actions Notifications](https://docs.github.com/en/actions/monitoring-workflows/about-workflow-notifications) and [GitLab CI Notifications](https://docs.gitlab.com/ee/ci/notifications.html) explain how to configure notifications. 47 | - **Test Flakiness**: Implement strategies to handle flaky tests or retries. [Handling Flaky Tests in Jenkins](https://www.jenkins.io/doc/book/pipeline/syntax/#retry) provides information on retries in Jenkins pipelines. 48 | - **Custom Test Reports**: Generate and publish custom test reports for better visibility. [GitHub Actions Artifacts](https://docs.github.com/en/actions/guides/storing-workflow-data-as-artifacts) and [GitLab CI Artifacts](https://docs.gitlab.com/ee/ci/yaml/#artifacts) show how to manage test reports. 49 | 50 | ## Conclusion 51 | 52 | By completing this challenge, you will gain practical experience in setting up a Continuous Integration pipeline focused on testing, ensuring that your applications are robust and maintain high quality. This skill is crucial for maintaining code integrity and improving development workflows. Explore additional improvements and challenges to further enhance your skills. 53 | 54 | Happy coding! 55 | -------------------------------------------------------------------------------- /challenges/junior/container-docker-compose.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Docker Compose 2 | 3 | ## Introduction 4 | 5 | The "Docker Compose" challenge is designed to help you learn how to create a `docker-compose.yml` file for managing multi-container applications. Docker Compose simplifies the process of defining and running multi-container Docker applications. 6 | 7 | ### Objectives 8 | 9 | - Understand the basics of Docker Compose and how it works. 10 | - Learn how to create a `docker-compose.yml` file to manage multiple containers. 11 | - Define services, networks, and volumes using Docker Compose. 12 | - Run and manage your multi-container application using Docker Compose commands. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Write a `docker-compose.yml` file to define and manage a multi-container application. 17 | 18 | 2. **Environment Setup**: 19 | - Ensure Docker and Docker Compose are installed on your machine. 20 | - Choose a sample multi-container application (e.g., a web application with a separate database). 21 | 22 | 3. **Implementation Details**: 23 | - Create a `docker-compose.yml` file in the root directory of your project. 24 | - Define multiple services in the `docker-compose.yml` file. Each service should correspond to a container. 25 | - Example `docker-compose.yml` for a web application with a database: 26 | 27 | ```yaml 28 | services: 29 | web: 30 | image: my-web-app:latest 31 | build: 32 | context: ./web 33 | ports: 34 | - "8080:8080" 35 | environment: 36 | - DATABASE_URL=mysql://db:3306/mydatabase 37 | depends_on: 38 | - db 39 | networks: 40 | - my-network 41 | 42 | db: 43 | image: mysql:5.7 44 | environment: 45 | MYSQL_ROOT_PASSWORD: example 46 | MYSQL_DATABASE: mydatabase 47 | MYSQL_USER: user 48 | MYSQL_PASSWORD: password 49 | volumes: 50 | - db-data:/var/lib/mysql 51 | networks: 52 | - my-network 53 | 54 | volumes: 55 | db-data: 56 | 57 | networks: 58 | my-network: 59 | ``` 60 | - **Explanation**: 61 | - `version`: Specifies the version of the Docker Compose file format. 62 | - `services`: Defines the services (containers) for your application. 63 | - `web`: The service for your web application. 64 | - `image`: Specifies the Docker image to use. 65 | - `build`: Defines the build context for building the image. 66 | - `ports`: Maps the container’s port to the host’s port. 67 | - `environment`: Sets environment variables for the service. 68 | - `depends_on`: Specifies dependencies between services (ensures `db` starts before `web`). 69 | - `networks`: Connects the service to a network. 70 | - `db`: The service for your database. 71 | - `image`: Specifies the Docker image for MySQL. 72 | - `environment`: Sets environment variables for MySQL. 73 | - `volumes`: Defines a volume for persistent data storage. 74 | - `networks`: Connects the service to the same network as the `web` service. 75 | - `volumes`: Defines named volumes for persistent storage. 76 | - `networks`: Defines custom networks for service communication. 77 | 78 | 4. **Testing**: 79 | - Use Docker Compose commands to manage your application: 80 | - **Build and Start Containers**: `docker-compose up --build` 81 | - **Start Containers in Background**: `docker-compose up -d` 82 | - **Stop Containers**: `docker-compose down` 83 | - Verify that all services are running and can communicate with each other. 84 | - Access the web application through the exposed ports and verify that it can connect to the database. 85 | 86 | ### Possible Improvements 87 | 88 | - **Scaling Services**: Use Docker Compose to scale services (e.g., run multiple instances of the web service). 89 | - **Environment-Specific Configurations**: Create different Docker Compose files for different environments (e.g., development, production). 90 | - **Health Checks**: Add health checks to ensure that services are healthy before starting dependent services. 91 | - **Custom Networks**: Use multiple custom networks to isolate services and control communication between them. 92 | 93 | ## Conclusion 94 | 95 | By completing this challenge, you will gain practical experience in managing multi-container applications using Docker Compose. This skill is crucial for deploying and managing complex applications in a consistent and efficient manner. Explore additional improvements and challenges to further enhance your skills. 96 | 97 | Happy coding! 98 | -------------------------------------------------------------------------------- /challenges/junior/container-dockerfile.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Dockerfile 2 | 3 | ## Introduction 4 | 5 | The "Dockerfile" challenge is designed to help you learn how to create a Dockerfile for containerizing an application, making it easy to run and deploy in any environment. 6 | 7 | ### Objectives 8 | 9 | - Understand the basics of Docker and how it works. 10 | - Learn how to write a Dockerfile to containerize an application. 11 | - Build and run a Docker image from the Dockerfile. 12 | - Understand how to expose ports, set environment variables, and handle dependencies in Docker. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Write a Dockerfile to containerize a simple application. 17 | 18 | 2. **Environment Setup**: 19 | - Install Docker on your machine if not already installed. 20 | - Choose a sample application (e.g., a basic web server or a simple script) written in your preferred programming language (e.g., JavaScript, Python, Java, C#). 21 | 22 | 3. **Implementation Details**: 23 | - Create a `Dockerfile` in the root directory of your application. 24 | - The Dockerfile should: 25 | - **Specify a base image**: Choose an official base image for your application’s programming language (e.g., `python:3.9`, `node:14`, `openjdk:11`). 26 | - **Copy application code**: Use the `COPY` or `ADD` instruction to add your application code to the image. 27 | - **Install dependencies**: Use `RUN` instructions to install necessary dependencies (e.g., `pip install -r requirements.txt` for Python or `npm install` for Node.js). 28 | - **Expose ports**: Use the `EXPOSE` instruction to expose any ports your application needs to run (e.g., `EXPOSE 8080` for a web server). 29 | - **Set environment variables**: Use the `ENV` instruction to set any necessary environment variables. 30 | - **Define the entry point**: Use the `CMD` or `ENTRYPOINT` instruction to specify the command that should run when the container starts. 31 | - Example Dockerfile for a Python web server: 32 | 33 | ```dockerfile 34 | # Use an official Python runtime as a parent image 35 | FROM python:3.9-slim 36 | 37 | # Set the working directory in the container 38 | WORKDIR /app 39 | 40 | # Copy the current directory contents into the container at /app 41 | COPY . /app 42 | 43 | # Install any needed packages specified in requirements.txt 44 | RUN pip install --no-cache-dir -r requirements.txt 45 | 46 | # Make port 8080 available to the world outside this container 47 | EXPOSE 8080 48 | 49 | # Define environment variable 50 | ENV NAME World 51 | 52 | # Run app.py when the container launches 53 | CMD ["python", "app.py"] 54 | ``` 55 | - **Build and Run**: 56 | - Build the Docker image using the `docker build` command (e.g., `docker build -t myapp .`). 57 | - Run the container using the `docker run` command (e.g., `docker run -p 8080:8080 myapp`). 58 | 59 | 4. **Testing**: 60 | - Verify that your application runs correctly inside the Docker container. 61 | - Test that you can access your application through the exposed ports (e.g., accessing a web server via `localhost:8080`). 62 | - Check the container logs using `docker logs` to ensure the application is running as expected. 63 | 64 | ### Possible Improvements 65 | 66 | - **Multi-Stage Builds**: Implement multi-stage builds in your Dockerfile to reduce the final image size. 67 | - **Volume Mounting**: Use Docker volumes to persist data or share data between the host and container. 68 | - **Environment-Specific Configurations**: Create different Dockerfiles or use build arguments for different environments (e.g., development, production). 69 | - **Docker Compose**: Extend the challenge by writing a `docker-compose.yml` file to manage multi-container applications. 70 | 71 | ## Conclusion 72 | 73 | By completing this challenge, you will gain practical experience in containerizing an application using Docker. This is a crucial skill for deploying applications in a consistent and reproducible way across different environments. Explore additional improvements and challenges to further enhance your skills. 74 | 75 | Happy coding! 76 | -------------------------------------------------------------------------------- /challenges/junior/service-authentication.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Authentication Service 2 | 3 | ## Introduction 4 | 5 | The "Authentication Service" challenge is designed to build a REST API that handles user authentication, including registration, login, and password recovery. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests. 10 | - Implement endpoints for user registration, login, and password recovery. 11 | - Securely store user credentials (e.g., hashing passwords). 12 | - Generate JWT tokens for authenticated sessions. 13 | - Understand HTTP methods (POST for data submission) and status codes. 14 | 15 | ### Instructions 16 | 17 | 1. **Objective**: Develop a REST API for user authentication, including registration, login, and password recovery. 18 | 19 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, C#) and set up the necessary environment. 20 | 21 | 3. **Implementation Details**: 22 | - Define endpoints for: 23 | - User Registration (`/register`) 24 | - User Login (`/login`) 25 | - Password Recovery (`/password-recovery`) 26 | - Validate user input (e.g., email format, password strength). 27 | - Store user credentials securely (e.g., hashing passwords with bcrypt). 28 | - Generate and return JWT tokens for authenticated sessions. 29 | - Implement email functionality for password recovery. 30 | 31 | 4. **Testing**: Test your API using an HTTP client (e.g., Postman, curl). 32 | - Send POST requests to the registration endpoint with user data. 33 | - Send POST requests to the login endpoint with user credentials. 34 | - Send POST requests to the password recovery endpoint with the user's email. 35 | - Verify that the responses are correct and status codes are appropriate (e.g., 200 OK, 400 Bad Request). 36 | 37 | ### Possible Improvements 38 | 39 | - **Email Verification**: Add email verification during registration. 40 | - **Rate Limiting**: Implement rate limiting to prevent brute force attacks. 41 | - **Logging and Monitoring**: Add logging and monitoring for security and performance. 42 | - **Third-Party Authentication**: Integrate with third-party authentication providers (e.g., Google, Facebook). 43 | - **Two-Factor Authentication**: Implement two-factor authentication for added security. 44 | 45 | ## Conclusion 46 | 47 | By completing this challenge, you will gain practical experience in developing an Authentication Service and learn essential practices for backend development. Explore additional improvements and challenges to further enhance your skills. 48 | 49 | Happy coding! 50 | -------------------------------------------------------------------------------- /challenges/junior/service-cryptography.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Cryptography Service 2 | 3 | ## Introduction 4 | 5 | The "Cryptography Service" challenge is designed to build a service that provides encryption and decryption functionalities, ensuring data security through cryptographic techniques. 6 | 7 | ### Objectives 8 | 9 | - Understand basic cryptographic concepts. 10 | - Implement encryption and decryption functionalities. 11 | - Secure sensitive data in a backend application. 12 | 13 | ### Instructions 14 | 15 | 1. **Objective**: Develop a service that offers encryption and decryption of data using a chosen cryptographic algorithm (e.g., AES, RSA). 16 | 17 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, C#) and set up the necessary environment. 18 | 19 | 3. **Implementation Details**: 20 | - **Endpoints**: 21 | - Define an endpoint (`/encrypt`) that accepts data via HTTP POST requests and returns the encrypted data. 22 | - Define an endpoint (`/decrypt`) that accepts encrypted data via HTTP POST requests and returns the decrypted data. 23 | - **Encryption and Decryption**: 24 | - Implement encryption using a secure algorithm (e.g., AES for symmetric encryption, RSA for asymmetric encryption). 25 | - Implement decryption to reverse the encryption process and retrieve the original data. 26 | - **Key Management**: 27 | - Securely generate and manage encryption keys. 28 | - Store keys in a secure manner (e.g., environment variables, key management service). 29 | 30 | 4. **Testing**: Test your service using a HTTP client (e.g., Postman, curl). 31 | - Send POST requests to the `/encrypt` endpoint with different data inputs and verify that the response contains the encrypted data. 32 | - Send POST requests to the `/decrypt` endpoint with the encrypted data and verify that the response contains the original data. 33 | 34 | ### Possible Improvements 35 | 36 | - **Authentication and Authorization**: Implement authentication and authorization to control access to the encryption and decryption endpoints. 37 | - **Logging and Monitoring**: Add logging and monitoring to track encryption and decryption activities. 38 | - **Algorithm Selection**: Extend the service to support multiple cryptographic algorithms and allow clients to choose. 39 | - **Performance Optimization**: Optimize the encryption and decryption processes for better performance. 40 | - **Key Rotation**: Implement key rotation mechanisms to periodically change encryption keys. 41 | 42 | ## Conclusion 43 | 44 | By completing this challenge, you will gain practical experience in developing a cryptography service and learn essential practices for securing data in a backend application. Explore additional improvements and challenges to further enhance your skills. 45 | 46 | Happy coding! 47 | -------------------------------------------------------------------------------- /challenges/junior/service-data-normalization.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Data Normalization Service 2 | 3 | ## Introduction 4 | 5 | The "Data Normalization Service" challenge focuses on developing an API service that standardizes and cleanses data to ensure consistency and efficiency in data processing. 6 | 7 | ### Objectives 8 | 9 | - Understand the importance of data normalization in database management. 10 | - Implement algorithms and techniques for data standardization. 11 | - Ensure data integrity and accuracy through normalization processes. 12 | 13 | ### Instructions 14 | 15 | 1. **Objective**: Develop a service that normalizes incoming data to a predefined structure or format. 16 | 17 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, C#) and set up the necessary environment. 18 | 19 | 3. **Implementation Details**: 20 | - **Endpoints**: 21 | - Define an endpoint (`/normalize`) that accepts data via HTTP POST requests and returns the normalized data. 22 | - **Data Normalization**: 23 | - Implement algorithms to cleanse and standardize data (e.g., removing duplicates, converting data types, enforcing constraints). 24 | - Ensure that the normalized data adheres to a specified schema or format. 25 | - **Validation**: 26 | - Validate incoming data to ensure it meets required criteria before normalization. 27 | - Handle edge cases and exceptions gracefully. 28 | 29 | 4. **Testing**: Test your service using a HTTP client (e.g., Postman, curl). 30 | - Send POST requests to the `/normalize` endpoint with different data inputs and verify that the response contains the normalized data. 31 | 32 | ### Possible Improvements 33 | 34 | - **Integration with Databases**: Extend the service to integrate with databases for storing and retrieving normalized data. 35 | - **Performance Optimization**: Optimize algorithms and data processing techniques for better performance. 36 | - **Error Handling**: Implement robust error handling for invalid data inputs or normalization failures. 37 | - **Versioning**: Consider versioning the API to manage changes in data normalization logic over time. 38 | - **Scalability**: Design the service architecture to handle large volumes of data and scale as needed. 39 | 40 | ## Conclusion 41 | 42 | By completing this challenge, you will gain practical experience in developing a data normalization service and learn essential practices for maintaining data quality and consistency in backend systems. Explore additional improvements and challenges to further enhance your skills. 43 | 44 | Happy coding! 45 | -------------------------------------------------------------------------------- /challenges/junior/service-email.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Email Service API 2 | 3 | ## Introduction 4 | 5 | The "Email Service API" challenge is designed to build a REST API that allows users to send emails programmatically. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests. 10 | - Implement endpoints for sending emails with customizable content and recipients. 11 | - Handle email templates and attachments (optional). 12 | - Understand HTTP methods (POST) and status codes. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a REST API that provides functionality for sending emails. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, C#) and set up the necessary environment. 19 | 20 | 3. **Implementation Details**: 21 | - Define an endpoint (`POST /send-email`) to send emails: 22 | - `POST /send-email`: Send an email with provided content (e.g., subject, body, recipients). 23 | - Implement logic to interact with email sending service or library (e.g., SMTP server, third-party email API). 24 | - Allow customization of email content such as subject, body (plain text or HTML), and recipients. 25 | - Optionally, support email templates (e.g., handlebars templates) and attachments (e.g., PDFs, images). 26 | 27 | 4. **Testing**: Test your API using a HTTP client (e.g., Postman, curl). 28 | - Send POST requests to the `/send-email` endpoint with appropriate data payloads (e.g., JSON with subject, body, recipients). 29 | - Verify that emails are sent successfully and handle error responses appropriately. 30 | 31 | ### Possible Improvements 32 | 33 | - **Email Templates**: Implement support for predefined email templates to streamline email creation. 34 | - **Attachment Handling**: Enhance functionality to support attachments such as files or images. 35 | - **Authentication**: Secure API endpoints, especially those involving email sending capabilities. 36 | - **Logging**: Implement logging to track email sending activities for debugging and analytics. 37 | - **Rate Limiting**: Implement rate limiting to prevent abuse and manage email sending limits. 38 | 39 | ## Conclusion 40 | 41 | By completing this challenge, you will gain practical experience in developing an Email Service API and learn essential practices for backend development related to email communication. Explore additional improvements and challenges to further enhance your skills. 42 | 43 | Happy coding! 44 | -------------------------------------------------------------------------------- /challenges/junior/service-notification.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Notification Service 2 | 3 | ## Introduction 4 | 5 | The "Notification Service" challenge is designed to build a REST API that allows users to manage and send notifications programmatically. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests. 10 | - Implement endpoints for sending notifications to users via various channels (e.g., email, SMS, push notifications). 11 | - Handle different types of notifications (e.g., alerts, reminders, updates). 12 | - Understand HTTP methods (POST) and status codes. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a REST API that provides functionality for managing and sending notifications. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, C#) and set up the necessary environment. 19 | 20 | 3. **Implementation Details**: 21 | - Define endpoints for sending notifications: 22 | - `POST /send-notification`: Send a notification with customizable content (e.g., message, recipient, notification type). 23 | - Implement logic to interact with notification services or libraries (e.g., email service, SMS gateway, push notification provider). 24 | - Allow customization of notification content such as message, recipient(s), notification type (e.g., alert, reminder). 25 | - Support multiple notification channels (e.g., email, SMS, push notifications) based on user preferences or system settings. 26 | 27 | 4. **Testing**: Test your API using a HTTP client (e.g., Postman, curl). 28 | - Send POST requests to the `/send-notification` endpoint with appropriate data payloads (e.g., JSON with message, recipient, notification type). 29 | - Verify that notifications are sent successfully and handle error responses appropriately. 30 | 31 | ### Possible Improvements 32 | 33 | - **Template Support**: Implement support for predefined notification templates to streamline notification creation. 34 | - **Multi-language Support**: Enhance functionality to support notifications in multiple languages. 35 | - **Authentication**: Secure API endpoints, especially those involving notification sending capabilities. 36 | - **Logging**: Implement logging to track notification sending activities for debugging and analytics. 37 | - **Batch Notifications**: Add support for sending batch notifications to multiple recipients at once. 38 | 39 | ## Conclusion 40 | 41 | By completing this challenge, you will gain practical experience in developing a Notification System API and learn essential practices for backend development related to communication and notification delivery. Explore additional improvements and challenges to further enhance your skills. 42 | 43 | Happy coding! 44 | -------------------------------------------------------------------------------- /challenges/junior/service-payment-processing.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Payment Processing API 2 | 3 | ## Introduction 4 | 5 | The "Payment Processing API" challenge is designed to build a REST API that allows users to process payments, handle refunds, and manage subscriptions programmatically. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests. 10 | - Implement endpoints for processing payments, refunds, and managing subscriptions. 11 | - Handle different payment methods (e.g., credit card, PayPal). 12 | - Understand HTTP methods (POST, GET, PUT) and status codes. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a REST API that provides functionality for payment processing. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, C#) and set up the necessary environment. 19 | 20 | 3. **Implementation Details**: 21 | - Define endpoints for payment processing: 22 | - `POST /process-payment`: Process a payment with provided details (e.g., amount, payment method, customer information). 23 | - `POST /refund-payment`: Initiate a refund for a previous payment. 24 | - `POST /create-subscription`: Set up a subscription for recurring payments. 25 | - `GET /subscriptions`: Retrieve details about active subscriptions. 26 | - `PUT /update-subscription/{subscriptionId}`: Update an existing subscription (e.g., change plan, update payment method). 27 | - `DELETE /cancel-subscription/{subscriptionId}`: Cancel an active subscription. 28 | - Implement logic to interact with payment gateway APIs or libraries (e.g., Stripe, PayPal) for processing payments and managing subscriptions. 29 | - Handle transactional operations securely and ensure compliance with payment industry standards (e.g., PCI DSS). 30 | 31 | 4. **Testing**: Test your API using a HTTP client (e.g., Postman, curl). 32 | - Send requests to each endpoint (`/process-payment`, `/refund-payment`, `/create-subscription`, `/subscriptions`) with appropriate data payloads (e.g., JSON with payment details, subscription information). 33 | - Verify that payments are processed successfully, refunds are initiated correctly, and subscription operations behave as expected. 34 | 35 | ### Possible Improvements 36 | 37 | - **Payment Method Support**: Implement support for various payment methods beyond credit cards (e.g., digital wallets, bank transfers). 38 | - **Webhooks**: Set up webhooks to receive real-time notifications about payment events (e.g., successful payments, subscription renewals). 39 | - **Authentication**: Secure API endpoints, especially those involving sensitive payment information. 40 | - **Reporting**: Add support for generating reports on payment transactions, refunds, and subscription metrics. 41 | - **Integration**: Integrate with e-commerce platforms or accounting systems to synchronize payment data. 42 | 43 | ## Conclusion 44 | 45 | By completing this challenge, you will gain practical experience in developing a Payment Processing API and learn essential practices for backend development related to financial transactions and subscription management. Explore additional improvements and challenges to further enhance your skills. 46 | 47 | Happy coding! 48 | -------------------------------------------------------------------------------- /challenges/junior/service-url-shortener.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - URL Shortener Service 2 | 3 | ## Introduction 4 | 5 | The "URL Shortener Service" challenge involves building an API that shortens long URLs into shorter, more manageable links. 6 | 7 | ### Objectives 8 | 9 | - Develop an understanding of URL shortening techniques and algorithms. 10 | - Implement a service that generates short URLs from long ones. 11 | - Ensure redirection from short URLs to original long URLs. 12 | 13 | ### Instructions 14 | 15 | 1. **Objective**: Create an API service that converts long URLs into short URLs and handles redirection. 16 | 17 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, C#) and set up the necessary environment. 18 | 19 | 3. **Implementation Details**: 20 | - **Endpoints**: 21 | - Define an endpoint (`/shorten`) that accepts long URLs via HTTP POST requests and returns a shortened URL. 22 | - Define an endpoint (`/{shortCode}`) that handles redirection to the original long URL when accessed via GET requests. 23 | - **URL Shortening**: 24 | - Implement algorithms (e.g., Base62 encoding) to generate short codes from long URLs. 25 | - Ensure uniqueness of short codes to avoid collisions and maintain integrity. 26 | - **Redirection**: 27 | - Implement logic to redirect users from short URLs to their corresponding long URLs. 28 | 29 | 4. **Testing**: Test your API using a HTTP client (e.g., Postman, curl). 30 | - Use the `/shorten` endpoint to generate short URLs from different long URLs. 31 | - Access the `/shortCode` endpoint with generated short codes to verify redirection to original long URLs. 32 | 33 | ### Possible Improvements 34 | 35 | - **Analytics**: Track usage statistics such as click counts and geographical data for shortened URLs. 36 | - **Custom URLs**: Allow users to specify custom short URLs for specific long URLs. 37 | - **Expiration**: Implement expiration policies for short URLs to automatically disable or delete them after a certain period. 38 | - **Security**: Enhance security measures to prevent misuse or abuse of the shortening service. 39 | - **API Documentation**: Provide comprehensive documentation for developers to integrate the URL shortener service into their applications. 40 | 41 | ## Conclusion 42 | 43 | By completing this challenge, you will gain practical experience in developing a URL shortener service and learn essential practices for handling URL management and redirection in backend systems. Explore additional improvements and challenges to further enhance your skills. 44 | 45 | Happy coding! 46 | -------------------------------------------------------------------------------- /challenges/junior/service-weather-notification.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Weather Notification API 2 | 3 | ## Introduction 4 | 5 | The "Weather Notification API" challenge is designed to build a RESTful API that fetches weather data and sends notifications based on specific weather conditions. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests. 10 | - Implement endpoints for fetching weather data and sending notifications. 11 | - Define notification criteria based on weather conditions (e.g., temperature, precipitation). 12 | - Understand HTTP methods (GET, POST) and status codes. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a RESTful API that provides functionality for weather notifications. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, C#) and set up the necessary environment. 19 | 20 | 3. **Implementation Details**: 21 | - Define endpoints: 22 | - `GET /weather`: Fetch current weather data for a specified location (e.g., city, coordinates). 23 | - `POST /set-notification`: Set up a notification rule based on weather conditions (e.g., send notification if temperature exceeds a threshold, notify if precipitation reaches a certain level). 24 | - `DELETE /cancel-notification/{notificationId}`: Cancel an existing weather notification rule. 25 | - Implement logic to interact with a weather data provider API (e.g., OpenWeatherMap, WeatherAPI) to fetch real-time weather information. 26 | - Allow customization of notification rules, including setting thresholds for weather conditions and specifying notification channels (e.g., email, SMS). 27 | 28 | 4. **Testing**: Test your API using a HTTP client (e.g., Postman, curl). 29 | - Send requests to the `/weather` endpoint with appropriate parameters (e.g., city name, coordinates) to fetch weather data. 30 | - Set up notification rules using the `/set-notification` endpoint and verify that notifications are triggered correctly based on weather conditions. 31 | 32 | ### Possible Improvements 33 | 34 | - **Advanced Notifications**: Implement support for advanced notification criteria (e.g., wind speed, humidity). 35 | - **Integration**: Integrate with messaging services (e.g., Twilio, SendGrid) for sending notifications via different channels. 36 | - **User Preferences**: Allow users to specify their preferred units (e.g., Celsius, Fahrenheit) and notification frequency. 37 | - **Alert History**: Maintain a history of triggered alerts and notifications for audit purposes. 38 | - **Geolocation Support**: Enhance the API to support geolocation-based weather fetching and notifications. 39 | 40 | ## Conclusion 41 | 42 | By completing this challenge, you will gain practical experience in developing a Weather Notification API and learn essential practices for backend development related to weather data integration and notification systems. Explore additional improvements and challenges to further enhance your skills. 43 | 44 | Happy coding! 45 | -------------------------------------------------------------------------------- /challenges/middle/advanced-ecommerce-api.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Advanced E-commerce API 2 | 3 | ## Introduction 4 | 5 | The "Advanced E-commerce API" challenge is designed to build a robust RESTful API that supports various features of an e-commerce platform. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests. 10 | - Implement endpoints for managing product catalogs, shopping carts, orders, payments, and user accounts. 11 | - Handle advanced e-commerce functionalities such as product search, filtering, sorting, and pagination. 12 | - Understand HTTP methods (GET, POST, PUT, DELETE) and status codes. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a RESTful API that provides functionality for an advanced e-commerce platform. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, C#) and set up the necessary environment. 19 | 20 | 3. **Implementation Details**: 21 | - Define endpoints: 22 | - **Products**: 23 | - `GET /products`: Retrieve a list of products with filtering, sorting, and pagination options. 24 | - `GET /products/{productId}`: Retrieve details about a specific product. 25 | - `POST /products`: Create a new product. 26 | - `PUT /products/{productId}`: Update an existing product. 27 | - `DELETE /products/{productId}`: Delete a product. 28 | - **Shopping Cart**: 29 | - `GET /cart`: Retrieve the current user's shopping cart contents. 30 | - `POST /cart/add`: Add a product to the shopping cart. 31 | - `PUT /cart/update/{productId}`: Update quantity or remove a product from the shopping cart. 32 | - `DELETE /cart/remove/{productId}`: Remove a product from the shopping cart. 33 | - **Orders**: 34 | - `POST /orders`: Place a new order based on items in the shopping cart. 35 | - `GET /orders/{orderId}`: Retrieve details about a specific order. 36 | - `GET /orders`: Retrieve a list of orders with filtering and pagination options. 37 | - `PUT /orders/{orderId}/cancel`: Cancel an order. 38 | - **Payments**: 39 | - `POST /payments/initiate`: Initiate a payment for an order. 40 | - `POST /payments/confirm`: Confirm payment completion and update order status. 41 | - **Users**: 42 | - `GET /users/{userId}`: Retrieve user details. 43 | - `PUT /users/{userId}`: Update user information (e.g., address, payment methods). 44 | - Implement logic to handle product catalogs, shopping cart management, order processing, payment integration, and user authentication. 45 | - Utilize database operations (e.g., CRUD operations) to store and retrieve data related to products, orders, and users. 46 | 47 | 4. **Testing**: Test your API using a HTTP client (e.g., Postman, curl). 48 | - Create, update, and delete products. 49 | - Add products to the shopping cart, place orders, and verify order status updates. 50 | - Test payment initiation and confirmation workflows. 51 | - Ensure API responses include appropriate status codes and error handling for edge cases. 52 | 53 | ### Possible Improvements 54 | 55 | - **Search and Filtering**: Enhance product search capabilities with keyword search, category filtering, and price range filtering. 56 | - **Recommendation Engine**: Implement product recommendations based on user browsing history or purchase behavior. 57 | - **Shipping Integration**: Integrate with shipping carriers to calculate shipping costs and track shipments. 58 | - **Analytics**: Implement analytics to track sales metrics, customer behavior, and product performance. 59 | - **Performance Optimization**: Optimize API performance with caching strategies, database indexing, and asynchronous processing for heavy operations. 60 | 61 | ## Conclusion 62 | 63 | By completing this challenge, you will gain practical experience in developing an Advanced E-commerce API and learn essential practices for backend development in the context of e-commerce platforms. Explore additional improvements and challenges to further enhance your skills. 64 | 65 | Happy coding! 66 | -------------------------------------------------------------------------------- /challenges/middle/analytics-api.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Analytics API 2 | 3 | ## Introduction 4 | 5 | The "Analytics API" challenge focuses on building a RESTful API that collects, processes, and presents analytical data from your application. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests for analytics data. 10 | - Implement endpoints for collecting events, processing metrics, and retrieving analytics reports. 11 | - Support real-time and batch data processing for different types of analytics. 12 | - Understand HTTP methods (POST, GET) and status codes. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop an Analytics API that provides functionality for tracking and analyzing application metrics. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, Go) and set up the necessary environment. 19 | 20 | 3. **Implementation Details**: 21 | - Define endpoints: 22 | - `POST /events`: Collect events and user actions from your application. 23 | - `GET /metrics/{metricId}`: Retrieve metrics and analytics data for a specific metric. 24 | - `GET /reports/{reportId}`: Generate and retrieve analytical reports based on predefined metrics. 25 | - Implement data processing pipelines for real-time and batch analytics: 26 | - **Real-time**: Process incoming events and update real-time dashboards or metrics. 27 | - **Batch**: Aggregate data periodically to generate historical reports and insights. 28 | - Store analytics data in a scalable and efficient database or data store (e.g., SQL, NoSQL). 29 | - Ensure data privacy and compliance with regulations (e.g., GDPR) for handling user data and analytics. 30 | 31 | 4. **Testing**: Test your API using a HTTP client (e.g., Postman, curl). 32 | - Send test events and verify their processing and storage. 33 | - Retrieve metrics and reports to validate data accuracy and completeness. 34 | - Validate API responses include appropriate status codes and error handling for edge cases. 35 | 36 | ### Possible Improvements 37 | 38 | - **Visualization**: Integrate with data visualization tools (e.g., Grafana, Tableau) for interactive dashboards. 39 | - **Predictive Analytics**: Implement machine learning models for predictive analytics and recommendations. 40 | - **Integration**: Integrate with third-party analytics platforms (e.g., Google Analytics) for cross-platform insights. 41 | - **Alerting**: Implement alerting mechanisms based on predefined thresholds or anomalies detected in data. 42 | - **Data Retention Policies**: Implement policies for data retention and archival based on regulatory requirements. 43 | 44 | ## Conclusion 45 | 46 | By completing this challenge, you will gain practical experience in developing an Analytics API and learn essential practices for backend development related to tracking, processing, and presenting analytical data. Explore additional improvements and challenges to further enhance your skills. 47 | 48 | Happy coding! 49 | -------------------------------------------------------------------------------- /challenges/middle/caching.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Caching Service 2 | 3 | ## Introduction 4 | 5 | The "Caching Service" challenge involves implementing a caching mechanism to improve the performance and efficiency of API responses. 6 | 7 | ### Objectives 8 | 9 | - Develop an understanding of caching principles and techniques. 10 | - Implement a caching service that stores and retrieves data from a cache store. 11 | - Ensure that cached data is updated and invalidated appropriately. 12 | 13 | ### Instructions 14 | 15 | 1. **Objective**: Create a caching service that enhances the performance of API responses by storing frequently accessed data. 16 | 17 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, C#) and set up the necessary environment. 18 | 19 | 3. **Implementation Details**: 20 | - **Caching Strategy**: 21 | - Choose a caching mechanism (e.g., in-memory cache like Redis, Memcached) suitable for your application's requirements. 22 | - Implement logic to store API responses in the cache upon first retrieval. 23 | - **Cache Invalidation**: 24 | - Define strategies to invalidate cache entries when data changes (e.g., time-based expiration, event-based invalidation). 25 | - Ensure that updated data triggers cache invalidation to maintain data consistency. 26 | - **Integration with APIs**: 27 | - Modify existing APIs or create new endpoints to utilize caching for improving response times. 28 | 29 | 4. **Testing**: Test your caching service by measuring response times before and after implementing caching. 30 | - Monitor cache hits and misses to evaluate the effectiveness of your caching strategy. 31 | - Use tools like Redis CLI or monitoring dashboards to inspect cache entries and performance metrics. 32 | 33 | ### Possible Improvements 34 | 35 | - **Cache Eviction Policies**: Implement eviction policies to manage cache size and prioritize frequently accessed data. 36 | - **Multiple Cache Layers**: Integrate multiple cache layers (e.g., local cache, distributed cache) for optimized performance. 37 | - **Cache Backing Store**: Configure a backing store to persist cache data across server restarts or failures. 38 | - **Performance Monitoring**: Implement logging and monitoring to track cache utilization and identify performance bottlenecks. 39 | - **Security**: Secure cache access and data integrity to prevent unauthorized access or tampering. 40 | 41 | ## Conclusion 42 | 43 | By completing this challenge, you will gain practical experience in implementing a caching service to optimize API performance and responsiveness. Explore additional improvements and challenges to further enhance your skills in backend development. 44 | 45 | Happy coding! 46 | -------------------------------------------------------------------------------- /challenges/middle/cms-api.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Content Management System (CMS) API 2 | 3 | ## Introduction 4 | 5 | The "Content Management System (CMS) API" challenge focuses on building a RESTful API that supports creating, updating, deleting, and retrieving various types of content. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests. 10 | - Implement endpoints for managing articles, posts, pages, media assets, and user roles. 11 | - Handle authentication, authorization, and role-based access control (RBAC). 12 | - Understand HTTP methods (GET, POST, PUT, DELETE) and status codes. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a CMS API that provides functionality for managing content. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, Go) and set up the necessary environment. 19 | 20 | 3. **Implementation Details**: 21 | - Define endpoints: 22 | - **Articles/Posts**: 23 | - `GET /articles`: Retrieve a list of articles/posts. 24 | - `GET /articles/{articleId}`: Retrieve details about a specific article/post. 25 | - `POST /articles`: Create a new article/post. 26 | - `PUT /articles/{articleId}`: Update an existing article/post. 27 | - `DELETE /articles/{articleId}`: Delete an article/post. 28 | - **Pages**: 29 | - `GET /pages`: Retrieve a list of pages. 30 | - `GET /pages/{pageId}`: Retrieve details about a specific page. 31 | - `POST /pages`: Create a new page. 32 | - `PUT /pages/{pageId}`: Update an existing page. 33 | - `DELETE /pages/{pageId}`: Delete a page. 34 | - **Media Assets**: 35 | - `GET /media`: Retrieve a list of media assets (images, videos, files). 36 | - `GET /media/{mediaId}`: Retrieve details about a specific media asset. 37 | - `POST /media`: Upload a new media asset. 38 | - `DELETE /media/{mediaId}`: Delete a media asset. 39 | - **User Management**: 40 | - `GET /users`: Retrieve a list of users. 41 | - `GET /users/{userId}`: Retrieve details about a specific user. 42 | - `POST /users`: Create a new user. 43 | - `PUT /users/{userId}`: Update an existing user. 44 | - `DELETE /users/{userId}`: Delete a user. 45 | - Implement authentication and authorization mechanisms (e.g., JWT, OAuth) for secure API access. 46 | - Implement role-based access control (RBAC) to restrict API endpoints based on user roles (e.g., admin, editor, author). 47 | - Ensure data validation and error handling for API requests and responses. 48 | 49 | 4. **Testing**: Test your API using a HTTP client (e.g., Postman, curl). 50 | - Create, update, delete articles/posts, pages, media assets, and user accounts. 51 | - Test authentication and authorization workflows with different user roles. 52 | - Validate API responses include appropriate status codes and error messages for edge cases. 53 | 54 | ### Possible Improvements 55 | 56 | - **Versioning**: Implement API versioning to manage backward compatibility with changes. 57 | - **Search and Filtering**: Enhance content retrieval with search, filtering, sorting, and pagination options. 58 | - **Workflow Management**: Implement workflows for content approval, publication, and archiving. 59 | - **Analytics**: Integrate analytics to track content performance metrics (e.g., views, engagement). 60 | - **Integration**: Integrate with third-party services (e.g., CDN for media storage, SEO tools) for enhanced functionality. 61 | 62 | ## Conclusion 63 | 64 | By completing this challenge, you will gain practical experience in developing a Content Management System (CMS) API and learn essential practices for backend development related to managing diverse content types and user roles. Explore additional improvements and challenges to further enhance your skills. 65 | 66 | Happy coding! 67 | -------------------------------------------------------------------------------- /challenges/middle/distributed-caching-api.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Distributed Caching System API 2 | 3 | ## Introduction 4 | 5 | The "Distributed Caching System API" challenge focuses on building a RESTful API that allows users to manage distributed caching for improved performance and scalability of applications. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests for caching operations. 10 | - Implement endpoints for storing, retrieving, updating, and deleting cached data. 11 | - Support distributed caching strategies for handling high-volume data access. 12 | - Understand HTTP methods (GET, POST, PUT, DELETE) and status codes. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a Distributed Caching System API that provides functionality for managing cached data. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, Go) and set up the necessary environment. 19 | 20 | 3. **Implementation Details**: 21 | - Define endpoints: 22 | - `PUT /cache/{key}`: Store data in the cache with a specified key. 23 | - `GET /cache/{key}`: Retrieve data from the cache based on the key. 24 | - `POST /cache/{key}`: Update existing data in the cache with a specified key. 25 | - `DELETE /cache/{key}`: Delete data from the cache based on the key. 26 | - Implement support for distributed caching strategies: 27 | - Choose a caching mechanism (e.g., Redis, Memcached) suitable for distributed environments. 28 | - Handle cache synchronization and consistency across multiple nodes or instances. 29 | - Implement caching policies such as expiration times and eviction strategies. 30 | - Ensure fault tolerance and error handling for cache operations and distributed environment failures. 31 | - Implement authentication and authorization mechanisms to restrict access to caching endpoints. 32 | 33 | 4. **Testing**: Test your API using a HTTP client (e.g., Postman, curl). 34 | - Store, retrieve, update, and delete cached data through API endpoints. 35 | - Validate cache consistency and synchronization across distributed nodes. 36 | - Verify API responses include appropriate status codes and error handling for edge cases. 37 | 38 | ### Possible Improvements 39 | 40 | - **Cache Invalidation**: Implement strategies for cache invalidation based on data updates or expiration policies. 41 | - **Monitoring**: Integrate with monitoring tools to track cache performance metrics (e.g., hit rate, miss rate). 42 | - **Encryption**: Implement data encryption for sensitive cached data. 43 | - **Scaling**: Optimize cache performance for scalability by adding or removing cache nodes dynamically. 44 | - **Integration**: Integrate with application frameworks (e.g., Spring Boot, Django) for seamless integration with existing systems. 45 | 46 | ## Conclusion 47 | 48 | By completing this challenge, you will gain practical experience in developing a Distributed Caching System API and learn essential practices for backend development related to caching and performance optimization. Explore additional improvements and challenges to further enhance your skills. 49 | 50 | Happy coding! 51 | -------------------------------------------------------------------------------- /challenges/middle/load-balancer.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Load Balancer 2 | 3 | ## Introduction 4 | 5 | The "Load Balancer" challenge focuses on implementing a load balancing solution to distribute incoming traffic across multiple servers for improved performance and reliability. 6 | 7 | ### Objectives 8 | 9 | - Understand the principles of load balancing and its importance in scaling applications. 10 | - Implement a load balancer that evenly distributes requests among backend servers. 11 | - Ensure fault tolerance and efficient resource utilization through load balancing strategies. 12 | 13 | ### Instructions 14 | 15 | 1. **Objective**: Develop a load balancing solution that evenly distributes incoming HTTP requests across multiple backend servers. 16 | 17 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, C#) and set up the necessary environment. 18 | 19 | 3. **Implementation Details**: 20 | - **Load Balancing Algorithms**: 21 | - Choose a load balancing algorithm (e.g., round-robin, least connections, IP hash) suitable for your application's requirements. 22 | - Implement logic to select backend servers based on the chosen algorithm. 23 | - **Health Checking**: 24 | - Integrate health checks to monitor the availability and responsiveness of backend servers. 25 | - Exclude unhealthy servers from receiving requests to maintain application stability. 26 | - **Scalability**: 27 | - Design the load balancer to scale horizontally by adding or removing backend servers dynamically. 28 | - Ensure that new servers are seamlessly integrated into the load balancing pool. 29 | 30 | 4. **Testing**: Test your load balancer under varying loads to evaluate its performance and effectiveness. 31 | - Measure response times and server utilization to optimize load balancing algorithms and configurations. 32 | - Use load testing tools (e.g., Apache JMeter, Loader.io) to simulate concurrent requests and observe load distribution. 33 | 34 | ### Possible Improvements 35 | 36 | - **Session Persistence**: Implement sticky sessions (session affinity) to route requests from the same client to the same backend server. 37 | - **Global Load Balancing**: Extend load balancing across multiple data centers or regions for geographical redundancy. 38 | - **Auto-Scaling Integration**: Integrate with auto-scaling mechanisms to dynamically adjust server capacity based on traffic patterns. 39 | - **Monitoring and Alerts**: Set up monitoring and alerting systems to detect load balancer and server performance issues in real-time. 40 | - **Security**: Implement security measures such as SSL termination and firewall rules to protect the load balancer and backend servers. 41 | 42 | ## Conclusion 43 | 44 | By completing this challenge, you will gain practical experience in designing and implementing a load balancer to enhance the scalability, reliability, and performance of backend applications. Explore additional improvements and challenges to further refine your skills in backend development. 45 | 46 | Happy coding! 47 | -------------------------------------------------------------------------------- /challenges/middle/message-queues.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Message Queue 2 | 3 | ## Introduction 4 | 5 | The "Message Queue" challenge involves implementing a message queue system to facilitate asynchronous communication between microservices or components within a distributed system. 6 | 7 | ### Objectives 8 | 9 | - Understand the role of message queues in decoupling components and improving scalability. 10 | - Implement a message queue system using a chosen technology (e.g., RabbitMQ, Kafka, AWS SQS). 11 | - Design message producers and consumers to handle message processing and ensure reliability. 12 | 13 | ### Instructions 14 | 15 | 1. **Objective**: Develop a message queue system that enables asynchronous communication between different parts of a distributed application. 16 | 17 | 2. **Environment Setup**: Choose a message queue technology suitable for your application requirements (e.g., RabbitMQ, Kafka) and set up the necessary environment. 18 | 19 | 3. **Implementation Details**: 20 | - **Message Broker Configuration**: 21 | - Install and configure the message queue broker (e.g., RabbitMQ server, Kafka cluster). 22 | - Define queues and topics based on the communication patterns between components. 23 | - **Message Producers**: 24 | - Develop components or services that produce messages and publish them to designated queues or topics. 25 | - Include error handling and retry mechanisms to handle message publication failures. 26 | - **Message Consumers**: 27 | - Implement components or services that consume messages from queues or topics. 28 | - Process messages asynchronously and ensure message acknowledgment to prevent message loss. 29 | - **Concurrency and Scalability**: 30 | - Design message processing logic to handle concurrency and scale horizontally by adding more message consumers. 31 | 32 | 4. **Testing**: Test your message queue system to verify its functionality and reliability under different scenarios. 33 | - Simulate message production and consumption using sample data to validate message processing and handling. 34 | - Monitor message queue metrics (e.g., message throughput, queue depth) to optimize performance and resource utilization. 35 | 36 | ### Possible Improvements 37 | 38 | - **Dead Letter Queues**: Implement dead letter queues to handle undeliverable or expired messages for troubleshooting. 39 | - **Message Serialization**: Optimize message serialization and deserialization for efficient data transfer. 40 | - **Message Filtering**: Introduce message filtering capabilities to route messages based on content or attributes. 41 | - **Integration Patterns**: Explore integration patterns (e.g., publish-subscribe, point-to-point) to support different communication needs. 42 | - **Monitoring and Alerting**: Set up monitoring dashboards and alerts to track message queue health and performance metrics. 43 | 44 | ## Conclusion 45 | 46 | By completing this challenge, you will gain practical experience in designing and implementing a message queue system to enable reliable and scalable communication between components in a distributed architecture. Further exploration of advanced features and integration patterns will enhance your skills in backend development. 47 | 48 | Happy coding! 49 | -------------------------------------------------------------------------------- /challenges/middle/microservices-ecommerce-api.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Microservices Architecture for E-commerce 2 | 3 | ## Introduction 4 | 5 | The "Microservices Architecture for E-commerce" challenge focuses on designing and implementing a scalable and resilient backend system using microservices. 6 | 7 | ### Objectives 8 | 9 | - Decompose the monolithic e-commerce application into independent microservices. 10 | - Implement services for product management, order processing, user management, payments, and more. 11 | - Utilize communication protocols and patterns suitable for microservices (e.g., REST, gRPC, message queues). 12 | - Understand service discovery, load balancing, and fault tolerance mechanisms. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Design and implement a microservices architecture for an e-commerce platform. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, Go) and set up the necessary environments for each microservice. 19 | 20 | 3. **Microservices Design**: 21 | - **Product Service**: Manages product catalog, inventory, and product details. 22 | - **Order Service**: Handles order creation, processing, and fulfillment. 23 | - **User Service**: Manages user accounts, authentication, and user profile information. 24 | - **Payment Service**: Handles payment processing, integration with payment gateways, and transaction management. 25 | - **Notification Service**: Sends notifications for order updates, promotions, and user interactions. 26 | - **Gateway Service**: Acts as an API gateway for routing requests to appropriate microservices and handling authentication and authorization. 27 | - **Configuration and Discovery**: Implement service discovery mechanisms (e.g., Consul, Eureka) for dynamic service registration and discovery. 28 | - **Communication**: Use RESTful APIs, gRPC for efficient communication between microservices, and message queues (e.g., RabbitMQ, Kafka) for asynchronous communication. 29 | - **Data Management**: Choose database technologies (e.g., SQL, NoSQL) suitable for each microservice's data needs. 30 | - **Security**: Implement security measures such as JWT for authentication, TLS for secure communication, and role-based access control (RBAC) for authorization. 31 | 32 | 4. **Testing**: Test each microservice individually and as a system using tools like Postman, curl, or integration testing frameworks. 33 | - Ensure that microservices interact correctly through their APIs and handle edge cases such as service failures or network delays. 34 | 35 | ### Possible Improvements 36 | 37 | - **Containerization**: Containerize microservices using Docker for easier deployment and scalability. 38 | - **Orchestration**: Use Kubernetes or Docker Swarm for orchestration and management of containerized microservices. 39 | - **Monitoring**: Implement monitoring and logging (e.g., Prometheus, ELK stack) to track microservices' health and performance. 40 | - **Resilience**: Implement retry mechanisms, circuit breakers (e.g., Hystrix), and fallbacks to handle service failures gracefully. 41 | - **Scalability**: Scale microservices independently based on workload demands using horizontal scaling techniques. 42 | 43 | ## Conclusion 44 | 45 | By completing this challenge, you will gain practical experience in designing and implementing a Microservices Architecture for an E-commerce platform. Explore additional improvements and challenges to further enhance your skills in distributed systems and backend development. 46 | 47 | Happy coding! 48 | -------------------------------------------------------------------------------- /challenges/middle/notification-service-api.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Notification Service API 2 | 3 | ## Introduction 4 | 5 | The "Notification Service API" challenge focuses on building a RESTful API that handles sending notifications to users through various channels. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests for sending notifications. 10 | - Implement endpoints for managing notification templates, recipients, and delivery. 11 | - Support multiple notification channels (e.g., email, SMS, push notifications). 12 | - Understand HTTP methods (POST, GET, PUT) and status codes. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a Notification Service API that provides functionality for sending notifications to users. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, Go) and set up the necessary environment. 19 | 20 | 3. **Implementation Details**: 21 | - Define endpoints: 22 | - `POST /notifications`: Send a notification to one or multiple recipients. 23 | - `GET /notifications/{notificationId}`: Retrieve details about a specific notification. 24 | - `GET /notifications/user/{userId}`: Retrieve notifications for a specific user. 25 | - `GET /notifications/templates`: Retrieve available notification templates. 26 | - `POST /notifications/templates`: Create a new notification template. 27 | - `PUT /notifications/templates/{templateId}`: Update an existing notification template. 28 | - `DELETE /notifications/templates/{templateId}`: Delete a notification template. 29 | - Implement support for multiple notification channels: 30 | - **Email**: Integrate with an SMTP server or third-party email service provider (e.g., SendGrid, Amazon SES). 31 | - **SMS**: Integrate with an SMS gateway provider (e.g., Twilio, Nexmo). 32 | - **Push Notifications**: Implement push notification services for mobile apps (e.g., Firebase Cloud Messaging, Apple Push Notification service). 33 | - Implement scheduling and delivery mechanisms for notifications. 34 | - Ensure security and compliance with regulations (e.g., GDPR) for handling user data and preferences. 35 | 36 | 4. **Testing**: Test your API using a HTTP client (e.g., Postman, curl). 37 | - Send notifications through different channels (email, SMS, push notifications) and verify delivery. 38 | - Test retrieval of notification details and templates. 39 | - Validate API responses include appropriate status codes and error handling for edge cases. 40 | 41 | ### Possible Improvements 42 | 43 | - **Personalization**: Enhance notification templates with dynamic content and user-specific data. 44 | - **Analytics**: Integrate analytics to track notification engagement metrics (e.g., open rates, click-through rates). 45 | - **Batch Processing**: Implement batch processing for sending notifications to large groups of users. 46 | - **Integration**: Integrate with CRM systems or marketing automation platforms for seamless communication. 47 | - **Security Enhancements**: Implement encryption for sensitive notification content and tokenization for recipient identifiers. 48 | 49 | ## Conclusion 50 | 51 | By completing this challenge, you will gain practical experience in developing a Notification Service API and learn essential practices for backend development related to managing and delivering notifications across different channels. Explore additional improvements and challenges to further enhance your skills. 52 | 53 | Happy coding! 54 | -------------------------------------------------------------------------------- /challenges/middle/payment-gateway-integration.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Payment Gateway Integration 2 | 3 | ## Introduction 4 | 5 | The "Payment Gateway Integration" challenge focuses on integrating a payment gateway into your application to handle secure payment transactions. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests and integrating with a payment gateway service. 10 | - Implement endpoints for initiating and processing payments. 11 | - Handle secure payment transactions and error handling. 12 | - Understand HTTP methods (POST, GET) and status codes. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a Payment Gateway Integration API that facilitates secure payment transactions. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, Go) and set up the necessary environment. 19 | 20 | 3. **Implementation Details**: 21 | - Define endpoints: 22 | - `POST /payment/initiate`: Initiate a payment request. 23 | - `POST /payment/confirm`: Confirm and process a payment. 24 | - `GET /payment/status/{transactionId}`: Check payment status. 25 | - Integrate with a payment gateway provider (e.g., Stripe, PayPal) to handle payment processing. 26 | - Implement error handling and validation for payment requests and responses. 27 | - Ensure secure handling of payment information and compliance with PCI DSS standards. 28 | - Implement mechanisms for retrying failed transactions and handling different payment scenarios (e.g., refunds, disputes). 29 | - Implement webhook endpoints for receiving and processing payment notifications from the gateway. 30 | 31 | 4. **Testing**: Test your API using a HTTP client (e.g., Postman, curl). 32 | - Initiate payment requests, confirm payments, and verify payment status. 33 | - Test error scenarios such as invalid payment requests or failed transactions. 34 | - Validate API responses include appropriate status codes and error messages for edge cases. 35 | 36 | ### Possible Improvements 37 | 38 | - **Subscription Payments**: Extend integration to support recurring billing and subscription management. 39 | - **Mobile Payments**: Implement support for mobile payment methods (e.g., Apple Pay, Google Pay). 40 | - **Multi-currency Support**: Enhance integration to handle payments in multiple currencies. 41 | - **Analytics**: Integrate analytics to track payment metrics (e.g., transaction volume, success rates). 42 | - **Security Enhancements**: Implement additional security measures such as tokenization and encryption for sensitive payment data. 43 | 44 | ## Conclusion 45 | 46 | By completing this challenge, you will gain practical experience in integrating a Payment Gateway into your application and learn essential practices for backend development related to handling secure payment transactions. Explore additional improvements and challenges to further enhance your skills. 47 | 48 | Happy coding! 49 | -------------------------------------------------------------------------------- /challenges/middle/real-time-chat-api.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Real-time Chat API 2 | 3 | ## Introduction 4 | 5 | The "Real-time Chat API" challenge focuses on building a scalable and efficient backend system that supports real-time messaging between users. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling WebSocket connections. 10 | - Implement endpoints for managing users, conversations, and messages. 11 | - Enable real-time updates and notifications for instant messaging. 12 | - Understand WebSocket protocol and handling real-time events. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a Real-time Chat API that provides functionality for instant messaging. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, Go) and set up the necessary environment for WebSocket support. 19 | 20 | 3. **Implementation Details**: 21 | - Define endpoints: 22 | - `POST /register`: Register a new user. 23 | - `POST /login`: Authenticate a user and generate a session token. 24 | - `GET /users`: Retrieve a list of all users. 25 | - `GET /users/{userId}`: Retrieve details about a specific user. 26 | - `POST /conversations`: Start a new conversation between users. 27 | - `GET /conversations/{conversationId}`: Retrieve messages from a specific conversation. 28 | - `POST /conversations/{conversationId}/message`: Send a message to a conversation. 29 | - Implement WebSocket support for real-time communication: 30 | - Establish WebSocket connections for users to send and receive messages instantly. 31 | - Handle message broadcasting to update all participants in a conversation in real-time. 32 | - Implement presence status (e.g., online, offline) for users and notify participants about changes in user status. 33 | - Ensure secure WebSocket connections with proper authentication and authorization mechanisms. 34 | 35 | 4. **Testing**: Test your API using WebSocket clients or tools like WebSocket extensions for browsers. 36 | - Verify WebSocket connections for sending and receiving messages. 37 | - Test API endpoints for user registration, login, conversation management, and message sending. 38 | 39 | ### Possible Improvements 40 | 41 | - **Message Encryption**: Implement end-to-end encryption for message security. 42 | - **Message Status**: Add support for message status indicators (e.g., read receipts, message delivered). 43 | - **Notification Integration**: Integrate with push notification services for offline message delivery. 44 | - **Attachment Support**: Allow users to send and receive media files or attachments within messages. 45 | - **Archiving**: Implement message archiving and retrieval for historical conversations. 46 | 47 | ## Conclusion 48 | 49 | By completing this challenge, you will gain practical experience in developing a Real-time Chat API and learn essential practices for backend development related to WebSocket communication and real-time messaging. Explore additional improvements and challenges to further enhance your skills. 50 | 51 | Happy coding! 52 | -------------------------------------------------------------------------------- /challenges/middle/subscription-management-api.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Subscription Management API 2 | 3 | ## Introduction 4 | 5 | The "Subscription Management API" challenge focuses on building a RESTful API that handles subscription lifecycle management for users. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests. 10 | - Implement endpoints for creating, updating, canceling, and querying subscriptions. 11 | - Handle recurring billing cycles and subscription status updates. 12 | - Understand HTTP methods (GET, POST, PUT, DELETE) and status codes. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a Subscription Management API that provides functionality for handling subscriptions. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, Go) and set up the necessary environment. 19 | 20 | 3. **Implementation Details**: 21 | - Define endpoints: 22 | - `POST /subscriptions`: Create a new subscription for a user. 23 | - `GET /subscriptions/{subscriptionId}`: Retrieve details about a specific subscription. 24 | - `PUT /subscriptions/{subscriptionId}`: Update an existing subscription (e.g., change plan, update payment method). 25 | - `DELETE /subscriptions/{subscriptionId}`: Cancel a subscription. 26 | - `GET /subscriptions/user/{userId}`: Retrieve all subscriptions for a specific user. 27 | - Implement logic to manage subscription lifecycle events: 28 | - Handle subscription creation with initial setup and billing information. 29 | - Manage recurring billing cycles and payment retries. 30 | - Update subscription details based on user actions (e.g., plan upgrades/downgrades). 31 | - Cancel subscriptions and handle associated actions (e.g., end of service access). 32 | - Ensure secure handling of payment information and compliance with subscription billing regulations. 33 | 34 | 4. **Testing**: Test your API using a HTTP client (e.g., Postman, curl). 35 | - Create new subscriptions, update subscription details, and verify cancellation workflows. 36 | - Test recurring billing scenarios and ensure accurate subscription status updates. 37 | - Validate API responses include appropriate status codes and error handling for edge cases. 38 | 39 | ### Possible Improvements 40 | 41 | - **Trial Periods**: Implement support for trial periods and promotional offers for subscriptions. 42 | - **Invoice Generation**: Generate invoices or billing statements for subscription charges. 43 | - **Analytics**: Integrate analytics to track subscription metrics (e.g., churn rate, renewal rates). 44 | - **Notifications**: Send notifications to users for upcoming renewals, failed payments, or subscription changes. 45 | - **Integration**: Integrate with payment gateways (e.g., Stripe, PayPal) for secure payment processing and subscription management. 46 | 47 | ## Conclusion 48 | 49 | By completing this challenge, you will gain practical experience in developing a Subscription Management API and learn essential practices for backend development related to handling recurring billing and subscription lifecycle management. Explore additional improvements and challenges to further enhance your skills. 50 | 51 | Happy coding! 52 | -------------------------------------------------------------------------------- /challenges/middle/task-scheduling-api.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Task Scheduling API 2 | 3 | ## Introduction 4 | 5 | The "Task Scheduling API" challenge focuses on building a RESTful API that allows users to schedule and manage tasks within your application. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests for task management and scheduling. 10 | - Implement endpoints for creating, updating, deleting, and querying tasks. 11 | - Support recurring tasks and scheduling options. 12 | - Understand HTTP methods (POST, GET, PUT, DELETE) and status codes. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a Task Scheduling API that provides functionality for managing and scheduling tasks. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, Go) and set up the necessary environment. 19 | 20 | 3. **Implementation Details**: 21 | - Define endpoints: 22 | - `POST /tasks`: Create a new task. 23 | - `GET /tasks`: Retrieve a list of tasks. 24 | - `GET /tasks/{taskId}`: Retrieve details about a specific task. 25 | - `PUT /tasks/{taskId}`: Update an existing task. 26 | - `DELETE /tasks/{taskId}`: Delete a task. 27 | - Implement support for task scheduling: 28 | - Define scheduling options such as one-time, recurring, or cron-based schedules. 29 | - Handle task execution based on scheduled intervals or specific dates/times. 30 | - Manage task dependencies and chaining for sequential or parallel execution. 31 | - Ensure fault tolerance and error handling for task execution and scheduling failures. 32 | - Implement authentication and authorization mechanisms to restrict access to task management endpoints. 33 | 34 | 4. **Testing**: Test your API using a HTTP client (e.g., Postman, curl). 35 | - Create tasks with different scheduling options (one-time, recurring) and verify their execution. 36 | - Retrieve task details and status to validate scheduling accuracy. 37 | - Validate API responses include appropriate status codes and error handling for edge cases. 38 | 39 | ### Possible Improvements 40 | 41 | - **Task Prioritization**: Implement priority levels for tasks to manage execution order. 42 | - **Concurrency Management**: Handle concurrent task execution and resource allocation. 43 | - **Notification Integration**: Integrate with a notification service to alert users about task status changes. 44 | - **Dashboard**: Develop a dashboard or monitoring interface to track task execution and scheduling. 45 | - **Integration**: Integrate with third-party task management tools or calendars for synchronization. 46 | 47 | ## Conclusion 48 | 49 | By completing this challenge, you will gain practical experience in developing a Task Scheduling API and learn essential practices for backend development related to task management and scheduling. Explore additional improvements and challenges to further enhance your skills. 50 | 51 | Happy coding! 52 | -------------------------------------------------------------------------------- /challenges/senior/api-gateway-service-mesh.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - API Gateway and Service Mesh 2 | 3 | ## Introduction 4 | 5 | The "API Gateway and Service Mesh" challenge focuses on building an architecture that efficiently manages microservices communication and API interactions through an API gateway and service mesh. 6 | 7 | ### Objectives 8 | 9 | - Design and implement an API gateway for routing and managing incoming API requests. 10 | - Implement a service mesh for handling communication between microservices. 11 | - Support traffic management, security, observability, and resilience within the architecture. 12 | - Understand API gateway and service mesh principles and best practices. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop an API Gateway and Service Mesh architecture that enhances scalability, security, and manageability of microservices-based applications. 17 | 18 | 2. **Environment Setup**: Choose your preferred technologies and tools for API gateway and service mesh implementation (e.g., Kong, Istio, Envoy). 19 | 20 | 3. **Implementation Details**: 21 | - **API Gateway**: 22 | - Configure API gateway routes and endpoints for incoming client requests. 23 | - Implement API versioning, request/response transformation, and rate limiting. 24 | - Handle authentication, authorization, and API security (e.g., JWT, OAuth). 25 | - Use API gateway policies for traffic management and load balancing. 26 | - **Service Mesh**: 27 | - Deploy a service mesh framework to manage service-to-service communication (e.g., Istio, Linkerd). 28 | - Implement service discovery, traffic routing, and load balancing across microservices. 29 | - Enhance observability with metrics, tracing, and logging for monitoring service interactions. 30 | - Implement fault tolerance, retries, and circuit breaking to improve service reliability. 31 | - **Integration**: 32 | - Integrate API gateway and service mesh components to streamline API management and microservices communication. 33 | - Ensure seamless interoperability and compatibility between gateway policies and mesh configurations. 34 | - **Security and Compliance**: 35 | - Implement mutual TLS (mTLS) for secure communication between services within the mesh. 36 | - Enforce access control policies and data encryption across API gateway and service mesh components. 37 | 38 | 4. **Testing**: Test your API gateway and service mesh setup using tools like curl, Postman, or specialized testing frameworks. 39 | - Validate API gateway configurations for routing, security policies, and API transformations. 40 | - Test service mesh functionality for service discovery, traffic routing, and fault tolerance mechanisms. 41 | - Monitor performance metrics and analyze logs to ensure efficient traffic management and service resilience. 42 | 43 | ### Possible Improvements 44 | 45 | - **Advanced Traffic Management**: Implement canary deployments and A/B testing using API gateway and service mesh capabilities. 46 | - **Global Load Balancing**: Extend service mesh capabilities with global load balancing for geo-distributed deployments. 47 | - **Policy Enforcement**: Enhance API gateway policies and service mesh configurations for compliance with regulatory requirements. 48 | - **Serverless Integration**: Integrate serverless functions with API gateway and service mesh for hybrid architecture support. 49 | - **Continuous Improvement**: Implement CI/CD pipelines for automated deployment and configuration updates across gateway and mesh components. 50 | 51 | ## Conclusion 52 | 53 | By completing this challenge, you will gain practical experience in designing and implementing an API Gateway and Service Mesh architecture, essential for managing microservices communication and API interactions in modern cloud-native applications. Explore additional improvements and challenges to further enhance your skills in building scalable, secure, and resilient architectures. 54 | 55 | Happy coding! 56 | -------------------------------------------------------------------------------- /challenges/senior/cqrs-event-sourcing-api.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - CQRS and Event Sourcing API 2 | 3 | ## Introduction 4 | 5 | The "CQRS and Event Sourcing API" challenge focuses on building an API that implements the CQRS pattern for separating command (write) and query (read) responsibilities, along with event sourcing for data persistence and state management. 6 | 7 | ### Objectives 8 | 9 | - Design and implement commands and queries for manipulating and retrieving data. 10 | - Implement event sourcing to capture and persist domain events as the primary source of truth. 11 | - Support scalability, consistency, and resilience through CQRS and event sourcing patterns. 12 | - Understand CQRS, event sourcing principles, and their practical applications. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a CQRS and Event Sourcing API that demonstrates separation of concerns between write and read operations, and uses event sourcing for data persistence. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language and frameworks for implementing CQRS and event sourcing patterns (e.g., Axon Framework, Eventuate). 19 | 20 | 3. **Implementation Details**: 21 | - **Commands and Queries**: 22 | - Define commands for write operations that change the application state (e.g., create, update, delete). 23 | - Implement queries for read operations that retrieve data from the event store or read models. 24 | - **Event Sourcing**: 25 | - Design event classes to represent domain events that capture state changes (e.g., OrderCreatedEvent, OrderUpdatedEvent). 26 | - Implement event handlers to process events and update aggregate state and projections. 27 | - Store events in an event store or database to maintain a sequential record of changes. 28 | - **Command Handlers**: 29 | - Implement command handlers to validate commands and apply domain logic. 30 | - Persist resulting events to the event store and publish them to event subscribers or projections. 31 | - **Query Handlers**: 32 | - Implement query handlers to retrieve data from read models or materialized views. 33 | - Optimize read operations for performance and scalability using appropriate data storage solutions. 34 | - **Integration**: 35 | - Integrate with messaging systems or event buses for event-driven communication between components. 36 | - Implement sagas or process managers for coordinating long-running transactions and maintaining consistency. 37 | 38 | 4. **Testing**: Test your CQRS and event sourcing API using unit tests and integration tests. 39 | - Validate command execution and event handling logic. 40 | - Test query responses and data consistency across read models and projections. 41 | - Perform load testing to evaluate system performance under varying transaction volumes and concurrency. 42 | 43 | ### Possible Improvements 44 | 45 | - **Snapshotting**: Implement snapshotting to optimize read model performance and reduce event store size. 46 | - **Event Replaying**: Provide mechanisms to replay events for auditing, debugging, or rebuilding state. 47 | - **Concurrency Control**: Implement optimistic or pessimistic locking strategies to handle concurrent command processing. 48 | - **Event Versioning**: Manage event schema evolution and backward compatibility to ensure long-term data integrity. 49 | - **Monitoring and Analytics**: Integrate with monitoring tools to track event processing metrics and performance. 50 | 51 | ## Conclusion 52 | 53 | By completing this challenge, you will gain advanced experience in designing and implementing a CQRS and Event Sourcing API, essential for building scalable and resilient backend systems. Explore additional improvements and challenges to further enhance your skills in event-driven architecture and distributed systems. 54 | 55 | Happy coding! 56 | -------------------------------------------------------------------------------- /challenges/senior/data-processing-api.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Real-Time Data Processing API 2 | 3 | ## Introduction 4 | 5 | The "Real-Time Data Processing API" challenge focuses on building an API that processes streaming data in real-time, enabling rapid data ingestion, processing, analysis, and response generation. 6 | 7 | ### Objectives 8 | 9 | - Design and implement API endpoints for real-time data ingestion and processing. 10 | - Support streaming data sources and processing frameworks for real-time analytics. 11 | - Integrate with data storage solutions for persistent data management and retrieval. 12 | - Understand real-time data processing principles, scalability, and best practices. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a Real-Time Data Processing API that handles streaming data, processes it in real-time, and provides actionable insights or responses. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., Python, Java) and real-time processing framework (e.g., Apache Kafka, Apache Flink) for implementing the API. 19 | 20 | 3. **Implementation Details**: 21 | - **Data Ingestion**: 22 | - Implement endpoints for ingesting streaming data from various sources (e.g., IoT devices, webhooks, sensors). 23 | - Design data ingestion pipelines for reliable and scalable data intake. 24 | - **Real-Time Processing**: 25 | - Define endpoints or processing logic for real-time data processing and transformation. 26 | - Implement stream processing frameworks or libraries to analyze incoming data streams. 27 | - **Data Storage and Retrieval**: 28 | - Integrate with data storage solutions (e.g., databases, data lakes) for storing processed data and historical insights. 29 | - Implement retrieval mechanisms for querying and accessing real-time and historical data. 30 | - **Monitoring and Management**: 31 | - Implement monitoring features to track data ingestion rates, processing latency, and system health. 32 | - Manage data pipelines, scaling capabilities, and fault tolerance mechanisms for robust operation. 33 | - **Integration**: 34 | - Integrate with analytics platforms or visualization tools for real-time data visualization and insights generation. 35 | - Ensure compatibility with cloud services and platforms for scalable data processing (e.g., AWS Kinesis, Google Dataflow). 36 | 37 | 4. **Testing**: Test your Real-Time Data Processing API using simulated data streams and scenarios. 38 | - Validate data ingestion pipelines for reliability, scalability, and fault tolerance. 39 | - Evaluate real-time processing capabilities for data transformation, aggregation, and anomaly detection. 40 | - Monitor system performance metrics and analyze data processing efficiency under varying load conditions. 41 | 42 | ### Possible Improvements 43 | 44 | - **Complex Event Processing**: Implement complex event processing (CEP) for detecting patterns and triggering automated responses. 45 | - **Machine Learning Integration**: Integrate machine learning models for real-time predictions and anomaly detection. 46 | - **Event Time Processing**: Enhance processing logic for event time-based operations and windowing functions. 47 | - **Automatic Scaling**: Implement auto-scaling mechanisms to handle fluctuating data volumes and processing demands. 48 | - **Data Quality Monitoring**: Integrate data quality checks and validation during real-time processing. 49 | 50 | ## Conclusion 51 | 52 | By completing this challenge, you will gain practical experience in designing and implementing a Real-Time Data Processing API, crucial for handling streaming data and enabling real-time analytics in modern applications. Explore additional improvements and challenges to further enhance your skills in real-time data processing and scalable backend architectures. 53 | 54 | Happy coding! 55 | -------------------------------------------------------------------------------- /challenges/senior/distributed-tracing-api.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Distributed Tracing API 2 | 3 | ## Introduction 4 | 5 | The "Distributed Tracing API" challenge focuses on building an API that facilitates distributed tracing for monitoring and analyzing requests across a microservices architecture. 6 | 7 | ### Objectives 8 | 9 | - Implement distributed tracing to track request flow and latency across distributed components. 10 | - Design and instrument APIs to generate and propagate trace context through requests. 11 | - Support visualization and analysis of distributed traces for troubleshooting and performance monitoring. 12 | - Understand distributed tracing principles, instrumentation, and integration. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a Distributed Tracing API that enables monitoring and tracing of requests through a distributed system. 17 | 18 | 2. **Environment Setup**: Choose your preferred distributed tracing system or framework (e.g., Jaeger, Zipkin, AWS X-Ray) and set up the necessary environment. 19 | 20 | 3. **Implementation Details**: 21 | - **Instrumentation**: 22 | - Integrate distributed tracing libraries or SDKs into your APIs to generate trace spans and propagate trace context. 23 | - Instrument endpoints and middleware to capture trace data (e.g., HTTP headers, correlation IDs). 24 | - **Trace Propagation**: 25 | - Implement mechanisms to propagate trace context across services using standard protocols (e.g., HTTP headers, message headers). 26 | - Ensure trace context is passed through asynchronous and event-driven communication (e.g., message queues, pub/sub systems). 27 | - **Data Collection and Storage**: 28 | - Configure data collectors to receive trace data and store it in a trace repository (e.g., Elasticsearch, Amazon DynamoDB). 29 | - Define retention policies and data aggregation methods for efficient trace storage and querying. 30 | - **Visualization and Analysis**: 31 | - Integrate with tracing visualization tools or dashboards to view distributed traces and analyze request flow. 32 | - Use trace analysis features to identify performance bottlenecks, latency issues, and dependencies. 33 | - **Integration**: 34 | - Integrate with microservices architecture components (e.g., API gateways, service meshes) for comprehensive trace coverage. 35 | - Ensure compatibility with cloud-native services and orchestration platforms (e.g., Kubernetes, AWS ECS). 36 | 37 | 4. **Testing**: Test your Distributed Tracing API using sample requests and scenarios. 38 | - Generate synthetic requests and validate trace propagation and visualization. 39 | - Monitor trace data for completeness, accuracy, and alignment with expected service interactions. 40 | - Evaluate trace analysis capabilities for identifying and resolving performance issues. 41 | 42 | ### Possible Improvements 43 | 44 | - **Advanced Trace Analysis**: Implement anomaly detection and predictive analytics based on trace data patterns. 45 | - **Contextual Logging**: Integrate trace context with logging frameworks for enriched log analysis and correlation. 46 | - **Distributed Context Management**: Enhance trace context propagation with context propagation libraries (e.g., OpenTelemetry). 47 | - **Real-time Monitoring**: Implement real-time trace monitoring and alerting for immediate issue identification. 48 | - **Performance Optimization**: Optimize trace data collection and storage for minimal overhead and efficient resource usage. 49 | 50 | ## Conclusion 51 | 52 | By completing this challenge, you will gain practical experience in designing and implementing a Distributed Tracing API, crucial for monitoring and optimizing performance across distributed microservices architectures. Explore additional improvements and challenges to further enhance your skills in observability and distributed systems. 53 | 54 | Happy coding! 55 | -------------------------------------------------------------------------------- /challenges/senior/event-driven-api.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Event-Driven Architecture API 2 | 3 | ## Introduction 4 | 5 | The "Event-Driven Architecture API" challenge focuses on building a RESTful API that enables event-driven communication and processing within your application. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling API requests for event registration, processing, and notification. 10 | - Implement endpoints for publishing and subscribing to events. 11 | - Support reliable event delivery, event routing, and handling of event-driven workflows. 12 | - Understand HTTP methods (POST, GET) and status codes. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop an Event-Driven Architecture API that facilitates event-driven communication and processing. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript, Python, Java, Go) and set up the necessary environment. 19 | 20 | 3. **Implementation Details**: 21 | - Define endpoints: 22 | - `POST /events`: Publish an event to the event bus. 23 | - `GET /events/{eventId}`: Retrieve details about a specific event. 24 | - `POST /subscriptions`: Subscribe to events based on specific criteria (e.g., event type, topic). 25 | - `DELETE /subscriptions/{subscriptionId}`: Unsubscribe from events. 26 | - Implement support for event sourcing and event-driven workflows: 27 | - Use message brokers (e.g., Kafka, RabbitMQ) for reliable event delivery and processing. 28 | - Handle event serialization, deserialization, and schema evolution. 29 | - Implement mechanisms for event replay and dead-letter handling. 30 | - Ensure fault tolerance and error handling for event processing and subscription management. 31 | - Implement authentication and authorization mechanisms to restrict access to event endpoints. 32 | 33 | 4. **Testing**: Test your API using a HTTP client (e.g., Postman, curl). 34 | - Publish events and verify their delivery and processing. 35 | - Subscribe to events and validate event propagation and handling. 36 | - Test error scenarios such as event duplication or subscription failures. 37 | - Validate API responses include appropriate status codes and error handling for edge cases. 38 | 39 | ### Possible Improvements 40 | 41 | - **Event Orchestration**: Implement workflows and state machines based on event-driven triggers. 42 | - **Event Monitoring**: Integrate with monitoring tools to track event throughput and latency. 43 | - **Event Replay**: Provide mechanisms to replay events for debugging or analytics purposes. 44 | - **Integration**: Integrate with third-party event-driven platforms (e.g., AWS EventBridge, Azure Event Grid) for interoperability. 45 | - **Real-time Dashboards**: Develop dashboards to visualize event streams and processing metrics. 46 | 47 | ## Conclusion 48 | 49 | By completing this challenge, you will gain practical experience in developing an Event-Driven Architecture API and learn essential practices for backend development related to event-driven communication and processing. Explore additional improvements and challenges to further enhance your skills. 50 | 51 | Happy coding! 52 | -------------------------------------------------------------------------------- /challenges/senior/graphql-api.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - GraphQL API 2 | 3 | ## Introduction 4 | 5 | The "GraphQL API" challenge focuses on building a scalable API using GraphQL for flexible and efficient data querying. 6 | 7 | ### Objectives 8 | 9 | - Set up a web server capable of handling GraphQL queries and mutations. 10 | - Implement GraphQL schema, resolvers, and data models. 11 | - Support query optimization, data fetching, and mutation handling. 12 | - Understand GraphQL principles and best practices. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a GraphQL API that provides a flexible and efficient way to interact with backend data. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., JavaScript/Node.js, Python, Java) and set up the necessary environment. 19 | 20 | 3. **Implementation Details**: 21 | - Define GraphQL schema: 22 | - Design GraphQL types (objects), queries, mutations, and subscriptions based on application requirements. 23 | - Implement input types for mutations and complex queries. 24 | - Implement resolvers: 25 | - Define resolver functions to fetch and manipulate data from underlying data sources (e.g., databases, REST APIs). 26 | - Optimize resolvers for efficient data fetching (e.g., batch processing, caching). 27 | - Handle authentication and authorization: 28 | - Implement middleware or hooks to handle user authentication and authorization within GraphQL resolvers. 29 | - Secure sensitive data and enforce access control based on user roles and permissions. 30 | - Implement subscriptions (optional): 31 | - Enable real-time data updates using GraphQL subscriptions for reactive applications. 32 | - Use WebSocket protocols (e.g., GraphQL subscriptions over WebSocket) to push updates to subscribed clients. 33 | - Ensure error handling and validation: 34 | - Validate input data and handle errors gracefully within GraphQL resolvers. 35 | - Use GraphQL-specific error handling techniques (e.g., custom error types, error formatting). 36 | - Integrate with existing APIs: 37 | - Wrap existing REST APIs or other services using GraphQL to provide a unified API layer. 38 | - Implement data stitching or federation for combining multiple GraphQL schemas into a single endpoint. 39 | 40 | 4. **Testing**: Test your API using a GraphQL client (e.g., Apollo Client, GraphQL Playground). 41 | - Write and execute GraphQL queries and mutations to verify functionality and data consistency. 42 | - Test edge cases and error scenarios to ensure robustness and reliability. 43 | - Monitor performance metrics such as query execution time and resolver efficiency. 44 | 45 | ### Possible Improvements 46 | 47 | - **Performance Optimization**: Implement data caching and batching strategies to improve GraphQL query performance. 48 | - **Schema Stitching**: Integrate multiple GraphQL schemas to provide a unified API interface across microservices. 49 | - **GraphQL Federation**: Implement Apollo Federation or similar for managing and scaling large GraphQL schemas. 50 | - **Real-time Updates**: Enhance GraphQL subscriptions with additional features like filtering or payload transformation. 51 | - **Tooling and Monitoring**: Integrate with GraphQL-specific tooling (e.g., Apollo Server metrics) for monitoring and troubleshooting. 52 | 53 | ## Conclusion 54 | 55 | By completing this challenge, you will gain practical experience in developing a GraphQL API and learn essential practices for backend development using GraphQL. Explore additional improvements and challenges to further enhance your skills in building efficient and scalable APIs. 56 | 57 | Happy coding! 58 | -------------------------------------------------------------------------------- /challenges/senior/microservices-application.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Microservices Architecture - Full Application 2 | 3 | ## Introduction 4 | 5 | The "Microservices Architecture - Full Application" challenge focuses on building a complex application using microservices architecture for scalability, flexibility, and maintainability. 6 | 7 | ### Objectives 8 | 9 | - Design and implement a set of microservices that work together to provide the application's functionality. 10 | - Set up inter-service communication, data consistency, and fault tolerance mechanisms. 11 | - Implement API gateways, service discovery, and configuration management for microservices. 12 | - Understand containerization (e.g., Docker) and orchestration (e.g., Kubernetes) for deployment. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a full application using Microservices Architecture that demonstrates modularity and independence of services. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming languages and frameworks for each microservice. Consider using technologies like Node.js, Python, Java, Go, etc. 19 | 20 | 3. **Implementation Details**: 21 | - **Microservices Design**: 22 | - Identify application functionalities to be split into separate services (e.g., user management, product catalog, order processing). 23 | - Design service boundaries and APIs to facilitate communication between microservices. 24 | - **API Gateway**: 25 | - Implement an API gateway to provide a single entry point for clients to interact with microservices. 26 | - Configure routing, load balancing, and authentication/authorization at the gateway level. 27 | - **Service Communication**: 28 | - Use RESTful APIs, gRPC, or message queues (e.g., RabbitMQ, Kafka) for inter-service communication. 29 | - Handle synchronous and asynchronous communication patterns based on service requirements. 30 | - **Data Management**: 31 | - Choose appropriate databases (e.g., SQL, NoSQL) for each microservice based on data access patterns and scalability requirements. 32 | - Implement data partitioning and replication strategies to ensure data consistency and availability. 33 | - **Deployment and Scaling**: 34 | - Containerize microservices using Docker for consistency across different environments. 35 | - Use orchestration tools like Kubernetes to manage containerized deployments, scaling, and service discovery. 36 | - **Monitoring and Logging**: 37 | - Implement centralized logging and monitoring (e.g., Prometheus, ELK stack) to track microservices' health and performance. 38 | - Set up alerts and dashboards to monitor key metrics such as response times, error rates, and resource usage. 39 | 40 | 4. **Testing**: Test your microservices individually and in integration. 41 | - Validate service functionality, API contracts, and inter-service communication. 42 | - Use container orchestration features for testing scalability, fault tolerance, and resilience to failures. 43 | - Perform load testing to evaluate system performance under varying loads. 44 | 45 | ### Possible Improvements 46 | 47 | - **Security**: Enhance security measures with OAuth, JWT, and API rate limiting. 48 | - **Event-Driven Architecture**: Implement event-driven patterns using message brokers for real-time updates and decoupling. 49 | - **Continuous Integration/Continuous Deployment (CI/CD)**: Automate build, test, and deployment pipelines to improve development efficiency and reliability. 50 | - **Fault Tolerance**: Implement circuit breakers, retries, and fallback mechanisms to handle service failures gracefully. 51 | - **Versioning**: Manage API versioning to ensure backward compatibility and smooth upgrades. 52 | 53 | ## Conclusion 54 | 55 | By completing this challenge, you will gain advanced experience in designing and implementing a full application using Microservices Architecture. You'll learn essential practices for building scalable, modular, and resilient systems. Explore additional improvements and challenges to further enhance your skills in distributed systems and cloud-native development. 56 | 57 | Happy coding! 58 | -------------------------------------------------------------------------------- /challenges/senior/ml-pipeline-api.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Machine Learning Pipeline API 2 | 3 | ## Introduction 4 | 5 | The "Machine Learning Pipeline API" challenge focuses on building an API that manages and orchestrates machine learning workflows, including data preprocessing, model training, evaluation, deployment, and inference. 6 | 7 | ### Objectives 8 | 9 | - Design and implement API endpoints for managing machine learning pipelines. 10 | - Support data ingestion, preprocessing, model training, evaluation, deployment, and inference. 11 | - Integrate with machine learning frameworks and libraries for model development and execution. 12 | - Understand machine learning pipeline orchestration, scalability, and best practices. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a Machine Learning Pipeline API that orchestrates end-to-end machine learning workflows. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., Python, Java) and machine learning framework (e.g., TensorFlow, PyTorch) for implementing the pipeline. 19 | 20 | 3. **Implementation Details**: 21 | - **Data Ingestion and Preprocessing**: 22 | - Implement endpoints for data ingestion from various sources (e.g., databases, file systems, APIs). 23 | - Design data preprocessing pipelines for cleaning, transformation, and feature engineering. 24 | - **Model Training and Evaluation**: 25 | - Define endpoints for training machine learning models using specified algorithms and hyperparameters. 26 | - Implement evaluation metrics and endpoints for model performance assessment. 27 | - **Model Deployment and Inference**: 28 | - Develop endpoints for deploying trained models as RESTful APIs or microservices. 29 | - Integrate model inference endpoints for making predictions or classifications on new data. 30 | - **Monitoring and Management**: 31 | - Implement monitoring features to track model performance, accuracy, and resource utilization. 32 | - Manage model versions, updates, and rollback mechanisms for deployment. 33 | - **Integration**: 34 | - Integrate with machine learning libraries (e.g., scikit-learn, MLflow) for model training and serialization. 35 | - Ensure compatibility with cloud services and platforms for scalable model deployment (e.g., AWS SageMaker, Google AI Platform). 36 | 37 | 4. **Testing**: Test your Machine Learning Pipeline API using sample datasets and scenarios. 38 | - Validate data ingestion and preprocessing pipelines for accuracy and data integrity. 39 | - Evaluate model training and evaluation endpoints for performance and metric calculation. 40 | - Verify model deployment and inference endpoints for correct predictions and real-time response handling. 41 | 42 | ### Possible Improvements 43 | 44 | - **Automated Hyperparameter Tuning**: Implement hyperparameter optimization techniques (e.g., grid search, Bayesian optimization). 45 | - **Continuous Integration/Continuous Deployment (CI/CD)**: Integrate CI/CD pipelines for automated model deployment and updates. 46 | - **Model Monitoring and Drift Detection**: Implement monitoring for model drift and performance degradation over time. 47 | - **Advanced Analytics**: Integrate with analytics platforms for deeper insights into model behavior and data patterns. 48 | - **Security and Compliance**: Implement data privacy measures and compliance with regulatory requirements (e.g., GDPR, HIPAA). 49 | 50 | ## Conclusion 51 | 52 | By completing this challenge, you will gain practical experience in designing and implementing a Machine Learning Pipeline API, essential for managing and operationalizing machine learning models in production environments. Explore additional improvements and challenges to further enhance your skills in machine learning orchestration and deployment. 53 | 54 | Happy coding! 55 | -------------------------------------------------------------------------------- /challenges/senior/multi-tenant-api.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Multi-Tenant Architecture API 2 | 3 | ## Introduction 4 | 5 | The "Multi-Tenant Architecture API" challenge focuses on building an API that supports multiple tenants (customers) using the same application instance, ensuring data isolation, security, and scalability. 6 | 7 | ### Objectives 8 | 9 | - Design and implement API endpoints for managing multi-tenant data segregation and access. 10 | - Support secure authentication, authorization, and tenant-specific configurations. 11 | - Implement data partitioning and isolation mechanisms for tenant-specific data. 12 | - Understand multi-tenant architecture principles, scalability, and best practices. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a Multi-Tenant Architecture API that allows multiple customers (tenants) to use the same application instance securely and independently. 17 | 18 | 2. **Environment Setup**: Choose your preferred programming language (e.g., Python, Java) and database management system (e.g., PostgreSQL, MongoDB) for implementing the API. 19 | 20 | 3. **Implementation Details**: 21 | - **Authentication and Authorization**: 22 | - Implement authentication mechanisms (e.g., JWT, OAuth) to securely authenticate tenants and users. 23 | - Define authorization rules to restrict access based on tenant-specific roles and permissions. 24 | - **Data Partitioning**: 25 | - Design data models and schemas for partitioning tenant-specific data within the same database instance. 26 | - Implement strategies for ensuring data isolation and preventing cross-tenant data leaks. 27 | - **Tenant Configuration Management**: 28 | - Develop endpoints or mechanisms for managing tenant-specific configurations and settings. 29 | - Support dynamic configuration updates and versioning to accommodate tenant-specific requirements. 30 | - **Security and Compliance**: 31 | - Implement data encryption, masking, and privacy measures to protect tenant data. 32 | - Ensure compliance with data protection regulations (e.g., GDPR, HIPAA) for tenant-specific data handling. 33 | - **Scalability and Performance**: 34 | - Design scalable database schemas and indexing strategies to support growing numbers of tenants and data volumes. 35 | - Implement caching mechanisms and performance optimizations for efficient multi-tenant data access. 36 | 37 | 4. **Testing**: Test your Multi-Tenant Architecture API using scenarios that simulate multiple tenants accessing the system simultaneously. 38 | - Validate data isolation and access controls to ensure tenant-specific data privacy and security. 39 | - Test scalability and performance under varying loads and tenant configurations. 40 | - Conduct security audits and vulnerability assessments to identify and mitigate potential risks. 41 | 42 | ### Possible Improvements 43 | 44 | - **Cross-Tenant Reporting and Analytics**: Implement aggregated reporting and analytics features while ensuring data segregation. 45 | - **Geo-Redundancy and Disaster Recovery**: Introduce geo-redundancy and disaster recovery measures to enhance availability and data resilience. 46 | - **Customizable Tenant Onboarding**: Develop self-service onboarding processes for new tenants with customizable configurations. 47 | - **Multi-Region Deployment**: Support multi-region deployment for serving tenants across different geographic locations. 48 | - **Audit Logging and Monitoring**: Implement comprehensive audit logging and monitoring to track tenant activities and system behavior. 49 | 50 | ## Conclusion 51 | 52 | By completing this challenge, you will gain practical experience in designing and implementing a Multi-Tenant Architecture API, essential for building scalable and secure SaaS applications that serve multiple customers. Explore additional improvements and challenges to further enhance your skills in multi-tenant architecture and backend development. 53 | 54 | Happy coding! 55 | -------------------------------------------------------------------------------- /challenges/senior/serverless-api.md: -------------------------------------------------------------------------------- 1 | # Backend Challenge - Serverless Architecture API 2 | 3 | ## Introduction 4 | 5 | The "Serverless Architecture API" challenge focuses on building a scalable API using serverless computing services for efficient resource management and cost-effectiveness. 6 | 7 | ### Objectives 8 | 9 | - Set up serverless functions or endpoints using platforms like AWS Lambda, Azure Functions, or Google Cloud Functions. 10 | - Implement API endpoints for handling various functionalities. 11 | - Leverage cloud services for data storage, authentication, and other backend operations. 12 | - Understand serverless architecture principles and event-driven workflows. 13 | 14 | ### Instructions 15 | 16 | 1. **Objective**: Develop a Serverless Architecture API that utilizes serverless computing services for backend operations. 17 | 18 | 2. **Environment Setup**: Choose a serverless platform (e.g., AWS Lambda, Azure Functions, Google Cloud Functions) and set up the necessary environment. 19 | 20 | 3. **Implementation Details**: 21 | - Define serverless functions or endpoints: 22 | - Implement functions to handle API requests (e.g., CRUD operations, data processing). 23 | - Use triggers and event bindings to automate function execution based on events (e.g., HTTP requests, database changes). 24 | - Integrate with cloud services (e.g., AWS API Gateway, Azure API Management) for API management and routing. 25 | - Implement data storage: 26 | - Use serverless databases or cloud storage services (e.g., AWS DynamoDB, Azure Cosmos DB, Google Cloud Firestore) for data persistence. 27 | - Manage data access and security using platform-specific features (e.g., IAM roles, access control policies). 28 | - Ensure fault tolerance and scalability: 29 | - Leverage auto-scaling and resource provisioning provided by serverless platforms. 30 | - Implement error handling and retries for reliable function execution. 31 | - Implement authentication and authorization mechanisms to secure API endpoints and data. 32 | 33 | 4. **Testing**: Test your API using a HTTP client (e.g., Postman, curl). 34 | - Invoke serverless functions through API endpoints and verify their functionality. 35 | - Validate integration with cloud services for data storage and authentication. 36 | - Test scalability by simulating varying loads and monitoring performance metrics. 37 | 38 | ### Possible Improvements 39 | 40 | - **Event-Driven Integration**: Implement event-driven architecture using message brokers or event hubs for asynchronous processing. 41 | - **Monitoring and Logging**: Integrate with cloud monitoring services (e.g., AWS CloudWatch, Azure Monitor) for performance monitoring and troubleshooting. 42 | - **Cost Optimization**: Optimize serverless function execution and resource usage to minimize costs. 43 | - **Deployment Automation**: Use CI/CD pipelines and infrastructure-as-code (IaC) tools for automated deployment and management. 44 | - **Integration**: Integrate with third-party services and APIs to extend functionality and interoperability. 45 | 46 | ## Conclusion 47 | 48 | By completing this challenge, you will gain practical experience in developing a Serverless Architecture API and learn essential practices for leveraging serverless computing for backend development. Explore additional improvements and challenges to further enhance your skills in cloud-native application design and development. 49 | 50 | Happy coding! 51 | -------------------------------------------------------------------------------- /solutions.md: -------------------------------------------------------------------------------- 1 | # Solutions 2 | 3 | You can link your solutions to the problems here. Please follow the format below: 4 | 5 | ```markdown 6 | - [Challenge Name](link-to-solution) 7 | ``` 8 | --------------------------------------------------------------------------------