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Backend Development Patterns Backend architecture patterns and best practices for scalable server side applications. API Design Patterns RESTful API Structure Repository Pattern Service Layer Pattern Middleware Pattern Database Patterns Query Optimization N+1 Query Prevention Transaction Pattern Caching Strategies Redis Caching Layer Cache Aside Pattern Error Handling Patterns Centralized Error Handler Retry with Exponential Backoff Authentication & Authorization JWT Token Validation Role Based Access Control Rate Limiting Simple In Memory Rate Limiter Background Jobs & Queues Simple Queue Pattern Logging & Monitoring Structured Logging Remember : Backend patterns enable scalable, maintainab…