nodejs-backend-patterns

Node.js backend patterns for microservices use a layered architecture with dependency injection to separate business logic from routing. This structure ensures scalable and maintainable REST APIs in Express or Fastify.

Implement authentication and rate limiting middleware in Express by defining separate middleware functions injected into the routing layer. This approach secures endpoints and controls traffic flow within your Node.js application.

Yes, you can use TypeScript with Fastify for database integration. The patterns support connecting both PostgreSQL and MongoDB, managing transactions, and formatting API responses within a typed environment.

Dependency injection in Node.js backend patterns works by passing services and database connections directly into route handlers or controllers. This decouples components, simplifying testing and transaction management for production-ready services.

Common error handling and caching strategies for REST APIs involve centralized error-catching middleware and response caching layers. These mechanisms standardize API response formatting and improve microservices performance.

You need transaction management in a Node.js microservice when executing multiple database operations that must succeed or fail together. It ensures data integrity during complex writes to PostgreSQL or MongoDB.