Express.js Developer Certification

Module 1: Introduction to Express.js

• Express.js overview
• Node.js ecosystem
• Backend development
• Express architecture
• Request-response lifecycle
• Express applications

Module 2: Express.js Environment Setup

• Node.js installation
• npm fundamentals
• Express installation
• Project initialisation
• Development tools
• Application structure

Module 3: Express Application Fundamentals

• Creating an application
• Starting the server
• Application settings
• Environment variables
• Development configuration
• Project organisation

Module 4: Routing Fundamentals

• Route definitions
• HTTP methods
• Route parameters
• Query parameters
• Route handlers
• Route organisation

Module 5: Request & Response Handling

• Request object
• Response object
• Request body
• Headers
• Status codes
• JSON responses

Module 6: Middleware Fundamentals

• Middleware concepts
• Application middleware
• Router middleware
• Built-in middleware
• Third-party middleware
• Middleware execution order

Module 7: Custom Middleware

• Creating middleware
• Request processing
• Response modification
• Middleware chaining
• Reusable middleware
• Conditional middleware

Module 8: RESTful API Development

• REST principles
• Resource design
• CRUD operations
• API endpoints
• Response structures
• RESTful conventions

Module 9: Database Integration

• Database connectivity
• Relational databases
• NoSQL databases
• Data models
• CRUD operations
• Database configuration

Module 10: MongoDB & Mongoose

• MongoDB fundamentals
• Mongoose
• Schemas
• Models
• Database queries
• Data relationships

Module 11: Data Validation

• Request validation
• Schema validation
• Input sanitisation
• Validation middleware
• Validation errors
• Data integrity

Module 12: Authentication

• Authentication concepts
• User registration
• Password hashing
• Login workflows
• JSON Web Tokens
• Authentication middleware

Module 13: Authorisation

• Roles and permissions
• Role-based access
• Protected routes
• Resource ownership
• Access control
• Authorisation middleware

Module 14: Error Handling

• Error-handling middleware
• Custom errors
• Async errors
• HTTP errors
• Standard error responses
• Error logging

Module 15: Express.js Security

• Security headers
• CORS
• Input sanitisation
• Rate limiting
• Injection awareness
• Secure application practices

Module 16: File Uploads & Static Content

• Static files
• File uploads
• Multipart forms
• File validation
• Upload management
• File-serving practices

Module 17: API Documentation

• API documentation principles
• OpenAPI concepts
• Swagger
• Endpoint documentation
• Request examples
• Response examples

Module 18: Testing Express Applications

• Unit testing concepts
• Integration testing
• API testing
• Route testing
• Middleware testing
• Test organisation

Module 19: Logging & Debugging

• Application logging
• Request logging
• Debugging
• Error tracing
• Development diagnostics
• Production logs

Module 20: Performance & Scalability

• Asynchronous processing
• Performance monitoring
• Response optimisation
• Caching concepts
• Compression
• Scalability considerations

Module 21: Real-Time & Advanced Backend Concepts

• WebSocket concepts
• Real-time communication
• Background processing
• API versioning
• Service architecture
• Backend integration patterns

Module 22: Deployment & Production Readiness

• Production configuration
• Environment management
• Process management
• Deployment concepts
• Monitoring
• Production best practices