NestJS

NestJS is a colossally disruptive, fiercely modern, and massively adopted framework that completely solved the biggest problem in the Node.js ecosystem. For years, Node developers used Express.js, which has zero architecture. This resulted in massive, chaotic, unmaintainable backend codebases. NestJS brought the strict, heavy-duty "Enterprise Architecture of Angular/Java" to the Node.js backend world. The absolute core differentiator of NestJS is its "Strict TypeScript Architecture and Dependency Injection." It forces developers to use heavily structured Controllers, Providers, and Modules. It uses decorators (`@Get`, `@Post`) exactly like Spring Boot (Java). This allows a massive team of developers to build highly scalable, incredibly organized microservices without the codebase turning into chaos. Because it provides the blazing speed of Node.js combined with the unshakeable architectural rigor of an enterprise Java framework, it is the absolute, unquestioned default choice for modern tech unicorns and Fortune 500 companies building massive backend APIs in TypeScript.