nodejs-backend-patterns

Build scalable, secure Node.js backends with Express/Fastify using modern patterns and best practices.

• Build REST/GraphQL APIs with Express or Fastify
• Implement middleware, error handling, and auth
• Structure apps with layered architecture
• Integrate databases and background jobs

• Layered architecture (controllers, services, repos)
• Type-safe routing with schema validation (Fastify)
• Security via middleware (helmet, cors, compression)
• Error handling with centralized exception management
• Database integration (SQL/NoSQL) with proper abstraction
• Authentication and authorization patterns
• Scalable and maintainable code structure
• Support for real-time and background processing

1. 1.Choose Express for simplicity, Fastify for performance
2. 2.Set up security middleware (helmet, cors, compression)
3. 3.Organize code in layers: controllers, services, repositories
4. 4.Validate input with schemas (Fastify) or DTOs
5. 5.Handle errors and auth in services and controllers
6. 6.Integrate databases and implement proper logging