When building backend applications with Node.js, choosing the right framework can significantly influence how an application is developed, maintained, and scaled.

Two popular choices are Express.js and NestJS. Both help developers build server-side applications and REST APIs, but they approach application architecture differently.

I started exploring backend development with Express.js, where its simplicity and flexibility made it easy to get started. As I worked with more structured application requirements, I began appreciating what NestJS brings to backend development.

Let's understand their differences and when each framework makes sense.

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