Learn NESTJS with Real Code Examples

Modules -> organize related features

Controllers -> handle incoming requests

Providers -> services for business logic

Middlewares, Guards, Interceptors -> cross-cutting concerns

Decorators -> metadata-driven routing, validation, and DI

Handles HTTP requests via controllers

Business logic in providers

Routing determined by decorators

Middlewares, guards, and interceptors for request processing

Supports microservice and WebSocket patterns

Modular and layered design

Dependency Injection for service management

Use of decorators for metadata and routing

Separation of concerns (controllers vs services)

Supports event-driven and message-based architectures

Enterprise REST APIs with authentication and roles

GraphQL APIs for frontend apps

Microservices communicating via RabbitMQ/Kafka

WebSocket servers for real-time apps

Full-stack applications with Angular/React frontend

Modular architecture for scalability

Dependency Injection for maintainable code

Decorator-based metadata

Type-safe backend development

Integrations with modern backend ecosystems

Organize features into modules

Use microservices for distributed architecture

Leverage caching and database optimization

Horizontal scaling via load balancers

Optimize middleware and request processing

Migrate from plain Express to NestJS by wrapping routes in controllers

Refactor services into providers

Leverage modules for feature encapsulation

Integrate DI for dependencies

Test all endpoints and business logic