Building a REST API with Node.js is one of the most common tasks for backend developers. In this comprehensive guide, we'll walk through creating a fully functional API with authentication, validation, error handling, and database integration.

Project Structure

A well-organized project structure is key to maintainability. We'll use a layered architecture with controllers, services, and data access layers.

Authentication

We'll implement JWT-based authentication with refresh tokens for a secure and scalable auth system.