nodejs-backend-patterns

Implement layered architecture in your Node.js backend by separating routes, services, and data access, using dependency injection to decouple components. This pattern provides a scalable and maintainable structure for both Express.js and Fastify.

The best way to implement global error handling in a Node.js API is by creating custom error classes and centralizing them with a global error handler. This mechanism catches and processes exceptions consistently across your backend services.

Add JWT authentication and rate limiting to Fastify or Express.js by implementing custom middleware. This pattern intercepts incoming requests, verifies tokens, and restricts excessive traffic to secure your API endpoints effectively.

Yes, you can use these Node.js backend patterns for both PostgreSQL and MongoDB database integration. The provided strategies demonstrate how to structure data access layers that interact seamlessly with either database system.

Yes, the Node.js backend pattern fully supports TypeScript implementation. Using TypeScript with these architectural patterns provides type safety and improves the reliability of your Express.js or Fastify backend services.

You need dependency injection in a Node.js backend service when you want to decouple your business logic from infrastructure components like databases. This pattern simplifies unit testing and allows for easier swapping of external dependencies.