backend-expert

What problem does it solve?

This Skill helps engineers build scalable Node.js/TypeScript backends using clean architecture, layered responsibilities, and secure practices to reduce maintenance burden and improve reliability.

Core Features & Use Cases

• Architecture: enforce Layered Architecture (Routes → Controllers → Services → Repositories) for clear separation of concerns.
• API & Data: design robust APIs, implement Repository pattern, optimize DB access, and apply caching strategies.
• Security & Quality: centralized error handling, input validation, and authentication/authorization patterns for secure services.
• Use Case: Example: building a B2B API with precise service boundaries, testable modules, and observable metrics.

Quick Start

1. Set up a Node.js project with your preferred framework (Express, NestJS, or Fastify).
2. Implement the Layered Architecture and a sample API route with Controllers, Services, and Repositories.
3. Add validation, error handling, and security middleware; iterate with tests and performance profiling.