Duration 5 Days – 35 hrs.
Overview
This Open Source API Development Training Course provides participants with practical knowledge and hands-on experience in designing, developing, securing, testing, documenting, and deploying APIs using modern open source technologies and frameworks.
The course covers RESTful API principles, API architecture, HTTP protocols, JSON data handling, authentication and authorization, API security, database integration, API testing, documentation, versioning, and deployment best practices. Participants will learn how to build scalable and maintainable APIs commonly used in enterprise web, mobile, cloud, and microservices applications.
Hands-on exercises and workshops will use open source tools and frameworks such as Node.js, Express.js, PostgreSQL, Swagger/OpenAPI, Postman, Docker, and Git.
The training combines lectures, guided labs, demonstrations, mini-projects, and real-world implementation exercises to help participants gain practical API development experience.
Objectives
- Understand API concepts, architecture, and use cases
- Design RESTful APIs using industry best practices
- Work with HTTP methods, headers, and status codes
- Develop APIs using open source frameworks
- Implement CRUD operations and database integration
- Handle JSON data and request validation
- Secure APIs using authentication and authorization techniques
- Implement API versioning and error handling
- Test and debug APIs using open source tools
- Generate API documentation using OpenAPI/Swagger
- Deploy APIs using Docker and open source environments
- Understand microservices and API gateway concepts
Target Audience
- Software Developers
- Web Developers
- Backend Developers
- Full Stack Developers
- System Integrators
- DevOps Engineers
- Technical Leads
- IT Professionals
- Mobile Application Developers
- Computer Science Students
- Professionals transitioning into backend or API development roles
Prerequisites
- Basic programming knowledge
- Basic understanding of web applications
- Familiarity with databases and SQL concepts
- Basic knowledge of JavaScript or any programming language is an advantage
- Basic command-line knowledge is helpful but not required
Course Outline
Module 1: Introduction to API Development
- Introduction to APIs
- API Types and Architectures
- REST vs SOAP vs GraphQL Overview
- Understanding RESTful APIs
- Client-Server Architecture
- HTTP Fundamentals
- HTTP Methods (GET, POST, PUT, DELETE, PATCH)
- Request and Response Lifecycle
- JSON and Data Exchange Formats
- API Use Cases and Real-World Applications
Hands-On
- Exploring public APIs
- Using Postman for API requests
Module 2: API Design Principles and Best Practices
- REST API Design Standards
- Resource Naming Conventions
- URI Design Best Practices
- Request and Response Structures
- HTTP Status Codes
- API Pagination and Filtering
- API Versioning Strategies
- Idempotency Concepts
- Error Handling Standards
- API Design Anti-Patterns
Hands-On
- Designing sample REST endpoints
- Creating API specifications
Module 3: Setting Up the API Development Environment
- Introduction to Node.js
- Introduction to Express.js
- Installing Development Tools
- Project Structure Best Practices
- Using npm Packages
- Environment Variables and Configuration
- Git Version Control Basics
Open Source Tools Covered
- Node.js
- Express.js
- Visual Studio Code
- Git
- Postman
Hands-On
- Creating a Node.js API project
- Building a basic Express server
Module 4: Building RESTful APIs
- Creating API Routes
- Handling GET, POST, PUT, DELETE Requests
- Working with Request Parameters
- Handling Query Strings
- JSON Request Parsing
- Middleware Concepts
- API Response Formatting
- CRUD API Development
Hands-On
- Building CRUD APIs
- Creating reusable middleware
- Testing API endpoints
Module 5: Database Integration
- Introduction to Relational Databases
- PostgreSQL Fundamentals
- Database Schema Design
- Connecting APIs to Databases
- SQL Operations in APIs
- Data Validation Techniques
- ORM vs Raw SQL Concepts
Open Source Technologies Covered
- PostgreSQL
- pgAdmin
- Sequelize ORM (Optional)
Hands-On
- Connecting Express APIs to PostgreSQL
- Creating database-driven CRUD APIs
Module 6: API Authentication and Security
- API Security Fundamentals
- Authentication vs Authorization
- JWT (JSON Web Tokens)
- API Key Authentication
- Password Hashing Concepts
- Securing Sensitive Data
- CORS Configuration
- Rate Limiting Concepts
- Input Validation and Sanitization
- OWASP API Security Overview
Hands-On
- Implementing JWT Authentication
- Securing protected API routes
- Input validation exercises
Module 7: API Documentation and Testing
- Importance of API Documentation
- OpenAPI Specification
- Swagger UI Integration
- API Testing Strategies
- Functional Testing Concepts
- Debugging APIs
- Logging and Monitoring Basics
Open Source Tools Covered
- Swagger/OpenAPI
- Postman
- Bruno (Optional)
- Winston Logger
Hands-On
- Generating Swagger documentation
- Creating Postman collections
- API debugging exercises
Module 8: Advanced API Development Concepts
- File Upload APIs
- API Caching Concepts
- Background Jobs and Queues
- Webhooks
- Third-Party API Integration
- Asynchronous Processing
- Introduction to GraphQL
- API Gateway Concepts
- Microservices Fundamentals
Hands-On
- Integrating external APIs
- Building webhook endpoints
Module 9: Docker and API Deployment
- Introduction to Docker
- Containerizing APIs
- Dockerfile Basics
- Environment Configuration
- Deployment Best Practices
- Reverse Proxy Concepts
- Basic CI/CD Overview
- API Hosting Options
Open Source Tools Covered
- Docker
- NGINX
- GitHub Actions (Introduction)
Hands-On
- Containerizing API applications
- Running APIs using Docker
Module 10: Capstone API Development Project
- API Project Planning
- Database Design Workshop
- Building a Complete REST API
- Authentication Implementation
- API Documentation
- Error Handling and Logging
- Deployment Preparation
- Final API Testing and Review
Capstone Project
- Build an end-to-end API system
- Create secured REST endpoints
- Connect APIs to PostgreSQL
- Generate Swagger documentation
- Deploy containerized APIs
- Present the completed project
Suggested Open Source Software Stack
| Category | Open Source Software | |
| Backend Framework | Node.js + Express.js | |
| Database | PostgreSQL | |
| Database Client | pgAdmin / DBeaver | |
| API Testing | Postman / Bruno | |
| Documentation | Swagger / OpenAPI | |
| Containerization | Docker | |
| Web Server | NGINX | |
| Source Control | Git | |
| IDE | Visual Studio Code |
