backend-dev-guidelines

Backend development guide for Node.js/Express/TypeScript microservices with layered architecture and strict best practices.

• Comprehensive backend development guide for microservices
• Covers routing, controllers, services, repositories, validation, error handling
• Enforces layered architecture and modern patterns

• Routes only route, controllers handle logic
• All controllers extend BaseController
• All errors sent to Sentry
• Use unifiedConfig, not process.env
• Validate all input with Zod
• Repository pattern for database access
• Comprehensive testing required
• Layered architecture (routes → controllers → services → repos)

1. 1.Create routes and delegate to controllers
2. 2.Extend controllers from BaseController
3. 3.Use Zod for input validation
4. 4.Implement error handling with Sentry
5. 5.Follow directory structure and naming conventions
6. 6.Write unit and integration tests