backend-patterns

The backend-patterns skill provides the Repository pattern to isolate database queries and the Service layer to encapsulate business logic, ensuring clear separation of concerns in Node.js APIs.

Centralized error handling for Express and Next.js API routes is structured using dedicated middleware that catches errors consistently across the application. This pattern ensures robust APIs by standardizing error responses and separating error logic from route handlers.

The best way to refactor a monolithic Express route is to split it into modular architectures using Repository and Service layers. Controllers handle HTTP requests, services manage business logic, and repositories execute data access, creating clear interfaces and testability.

Yes, this backend architecture approach works with Next.js API routes. The patterns apply directly to both Express and Next.js ecosystems, allowing you to implement RESTful design, middleware, and efficient querying within serverless or traditional Node.js server environments.

You implement caching strategies and efficient querying within a Node.js service layer by routing data requests through the service, which checks the cache before calling the repository. This pattern reduces database load and optimizes data fetching performance.