Summary: Seeking a backend developer to own architecture, integrate APIs with the frontend, and migrate legacy code to a modern Node.js stack in a long-term engagement. Highlights: 1. Opportunity to grow as the platform scales 2. Work with modern technologies and best engineering practices 3. Dynamic and innovative technical team At **TechBiz Global**, we are providing recruitment service to our TOP clients from our portfolio. We are currently looking for a Business Development Executive to join one of our **clients**' team. If you're looking for an exciting opportunity to grow in a innovative environment, this could be the perfect fit for you. **About the Role** You will take ownership of our backend architecture, work closely with the frontend team on API integration, and help migrate legacy C\#/.NET code to a modern Node.js stack. This is a long\-term engagement with room to grow as the platform scales. * 3\+ years of backend development experience * Strong proficiency in NestJS and TypeScript * Solid understanding of RESTful API design and Clean Architecture * Experience with PostgreSQL and ORM tools (TypeORM or Prisma) * Familiarity with Docker and containerized deployments * Fluent written and spoken English (for technical documentation and async communication) **Core Requirements** * Design and build scalable backend architecture using NestJS and TypeScript * Database design and optimization with PostgreSQL \+ TypeORM / Prisma * Implement RESTful APIs, JWT authentication, CQRS, and Clean Architecture principles * Integrate Firebase Auth and push notifications * Set up and manage MinIO / AWS S3 file storage * Containerization and deployment management using Docker * Collaborate with frontend team on API integration * Migrate legacy C\#/.NET codebase to Node.js * Write unit and integration tests; participate in code reviews **Tech Stack** * Backend: Node.js, NestJS, TypeScript, TypeORM / Prisma * Database: PostgreSQL, Redis * DevOps: Docker, Docker Compose, CI/CD (GitHub Actions / GitLab CI) * Cloud: Firebase, MinIO / AWS S3 * Testing: Jest, Supertest * Version Control: Git, GitHub / GitLab **Nice to Have** * Ability to read and understand C\#/.NET code * Experience with DDD, Microservices, GraphQL, or Event\-driven architecture * Redis caching experience * i18n / multi\-language system implementation * Legacy codebase refactoring experience **What We Offer** * Long\-term collaboration with a growing startup * Work with modern technologies and best engineering practices * Dynamic and innovative technical team * Performance\-based salary growth * Future equity potential