Node.js Architecture Best Practices

Structuring Express for Scale

When building enterprise applications with Node.js, a flat folder structure will quickly become unmaintainable. You need a solid architecture.

The Controller-Service-Repository Pattern

Separating concerns is the most important principle. Your routes should only handle HTTP requests, your controllers should validate input, and your services should hold the business logic.

• Routes: Define endpoints and middleware.
• Controllers: Extract data from requests and send responses.
• Services: The core business logic.
• Repositories: Database interactions.

Adopting this pattern ensures your application remains testable and scalable as your team grows.