nodejs-backend-patterns

Structure a scalable Node.js backend using a layered architecture pattern that separates controllers, services, repositories, and middleware. This approach ensures maintainable codebases for REST APIs or microservices built with Express or Fastify.

Implement authentication scaffolding in a Node.js API by applying JWT middleware alongside authorization layers. This pattern provides secure defaults and robust error handling directly within your Express or Fastify route architecture.

Integrate PostgreSQL and MongoDB by applying the repository pattern with database connection pooling and transaction support. This separates data access logic from business logic, ensuring scalable SQL and NoSQL database integration.

Yes, these Node.js backend patterns meet requirements for TypeScript typing. The architecture supports typed controllers, services, and repositories, allowing you to build type-safe Express or Fastify applications with secure defaults.

A production-ready Node.js backend should include helmet, cors, compression, structured logging, rate limiting, and validation. These secure defaults protect Express and Fastify APIs while ensuring robust error handling and maintainability.