nodejs-backend-patterns

Structure a production-grade Node.js backend using layered architecture with controllers, services, and repositories. This pattern separates business logic from data access, applying TypeScript typing and dependency injection for scalable Express or Fastify applications.

Implement middleware patterns for Express and Fastify by wiring in authentication, error-handling, and validation layers. This approach ensures robust request processing and structured logging across REST APIs, GraphQL servers, and real-time apps.

Dependency injection in Node.js backend architecture decouples service layers from their data dependencies. Using TypeScript, this pattern Streamlines testing and allows seamless integration with SQL or NoSQL databases within your Express or Fastify application.

Yes, these Node.js backend patterns support both SQL and NoSQL database integration. The repository layer abstracts data access, allowing your services to interact with different database types while maintaining consistent validation and caching strategies.

A scalable Node.js REST API requires structured logging, rate limiting, caching, and robust error handling. These production-grade patterns prevent system overload and ensure reliable authentication alongside comprehensive testing procedures.

Handle authentication and error handling in a Fastify server by applying dedicated middleware patterns. This setup manages authorization flows and catches exceptions uniformly, integrating seamlessly with your TypeScript types and service layer.