backend-patterns

Structure a scalable Node.js backend by layering data access, business logic, and HTTP handling using repository, service, and middleware patterns. This approach isolates API routing from data operations, ensuring maintainability and testability across RESTful and GraphQL services.

The repository pattern abstracts data access logic into dedicated classes, separating persistence details from business logic. Use it in Express to centralize database queries, making your service layer thinner and your data sources swappable without altering core application logic.

Implement error handling and rate limiting in a TypeScript API by applying middleware patterns that intercept requests. Centralized error middleware catches operational errors uniformly, while rate limiting middleware restricts request volumes to protect backend services from abuse.

Yes, you can apply these backend patterns with Next.js API routes. The service and repository layers integrate directly into Next.js serverless functions, allowing you to maintain robust API design, authentication, and caching strategies across both Node.js and Next.js projects.

Manage background jobs and caching in a scalable backend by implementing asynchronous queue systems and strategic caching layers. Offload intensive tasks to background workers and use caching to reduce database load, improving overall API response times and throughput.

You do not need to configure authentication and logging before scaffolding a service layer, but integrating them concurrently via middleware is recommended. Applying authentication and logging patterns early ensures secure request tracking throughout your Node.js or Next.js application.