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Since I got good experience with Spring (Java) and Angular ( TypeScript), I was happy when I found NestJS, which got it's inspiration of these both frameworks. It brings Dependency Injection to TypeScript's back-end world, which is super helpful to create high salable and clean projects.

Nest.js Introduction

Nest is a framework for building efficient, scalable Node.js server-side applications. It uses progressive JavaScript, is built with and fully supports TypeScript (yet still enables developers to code in pure JavaScript) and combines elements of OOP (Object Oriented Programming), FP (Functional Programming), and FRP (Functional Reactive Programming).

Under the hood, Nest makes use of robust HTTP Server frameworks like Express (the default) and Fastify. Nest provides a level of abstraction above these frameworks, but can also expose their APIs directly to the developer. This allows for easy use of the myriad third-party modules which are available for each platform.

Philosophy

In recent years, thanks to Node.js, JavaScript has become the “lingua franca” of the web for both front and backend applications. This has given rise to awesome projects like Angular, React and Vue, which improve developer productivity and enable the construction of fast, testable, and extensible frontend applications. However, while plenty of superb libraries, helpers, and tools exist for Node (and server-side JavaScript), none of them effectively solve the main problem - architecture.

Nest provides an out-of-the-box application architecture which allows developers and teams to create highly testable, scalable, loosely coupled, and easily maintainable applications.

Source: https://docs.nestjs.com/