We are looking for an experienced NestJS backend developer to build and maintain the backend of a web application. The system will handle user authentication, API integrations, and data management. The backend should be scalable, well-structured, and follow best practices. Responsibilities: Develop REST APIs using NestJS Implement authentication (JWT / OAuth) Work with databases (PostgreSQL or MongoDB) Integrate third-party APIs Write clean, maintainable, and well-documented code Optimize performance and ensure security Requirements: Strong experience with Node.js and NestJS Experience with TypeScript Familiar with RESTful API design Experience with PostgreSQL or MongoDB Knowledge of Docker is a plus Experience with microservices is a plus Please include examples of past backend projects when applying.