NestJS API Development

Overview

NestJS is a progressive Node.js framework for building scalable, enterprise-grade applications using TypeScript. This skill should be invoked when creating enterprise Node.js APIs, microservices, or backend applications that require strong architecture, dependency injection, and modular organization.

Core Principles

• Modular Architecture: Organize code into modules that encapsulate related functionality
• Dependency Injection: Leverage NestJS's built-in DI container for loose coupling
• Decorator-Based: Use decorators for routing, validation, and authentication
• TypeScript First: Benefit from full TypeScript support with static typing

Preparation Checklist

• Initialize NestJS project: nest new project-name
• Plan module structure (users, products, orders, etc.)
• Choose database integration (TypeORM, Prisma, Mongoose)
• Decide on validation approach (class-validator, built-in pipes)