Backend Development Patterns

Architecture patterns and best practices for scalable server-side applications.

When to Activate

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

Repository Pattern

Abstract data access behind a clean interface. The repository handles queries; callers never see SQL or ORM details.