backend-patterns

name	backend-patterns
description	Use when designing backend services: layered architecture, error handling, logging, API design, database access, and security patterns.

Backend Development Patterns

Adapted from ECC's backend-patterns skill (MIT).

Backend architecture patterns and best practices for scalable server-side applications.

When to Activate

• Designing REST or GraphQL API endpoints
• Implementing repository, service, or controller layers
• Optimizing database queries (N+1, indexing, connection pooling)
• Adding caching (Redis, in-memory, HTTP cache headers)
• Setting up background jobs or async processing
• Structuring error handling and validation for APIs
• Building middleware (auth, logging, rate limiting)

See REFERENCE.md for API design, repository pattern, service layer, middleware, database patterns, caching strategies, error handling, auth/authz, rate limiting, background jobs, and logging patterns.

For deeper API contract patterns (REST/GraphQL contracts, error formats, versioning, pagination), see api-design.