backend-patterns

The repository and service layer patterns structure a Node.js Express API by separating data access logic from business logic. The repository handles database queries, while the service layer orchestrates operations, ensuring maintainable and scalable backend architecture.

Preventing N+1 query problems in Node.js requires optimizing database queries through eager loading or batching related data. Implementing transactions and proper query optimization strategies ensures efficient data retrieval and maintains backend performance under load.

Centralized error handling and authentication in Express rely on middleware to intercept requests. JWT authentication verifies user identity, while a dedicated error-handling middleware catches and formats errors consistently across all RESTful API routes.

Yes, the backend architecture guide covers rate limiting and caching strategies for Next.js API routes. It details how to implement effective caching to reduce server load and rate limiting to protect endpoints from excessive requests.

Background jobs should be used instead of synchronous API requests in backend development when processing long-running tasks. This prevents blocking the event loop in Node.js, ensuring RESTful API endpoints remain responsive while tasks execute asynchronously.