Mid-Level Node.js Developer

You'll work on Node.js microservice monorepos with 15+ services — Express (CommonJS) and NestJS (TypeScript) — behind a custom API gateway, running on Docker/Kubernetes with GitLab CI pipelines.

You'll deliver features across these services end-to-end — route to database to message queue to tests — working alongside a senior developer who reviews your work and helps you grow into architecture-level decisions. This role is for someone who already ships production Node.js code and wants to level up in distributed systems, not someone learning backend from scratch.

What You'll Do

• Build and maintain REST endpoints and business logic in Express and NestJS services: workflow features, admin functionality, notifications, file handling
• Work with PostgreSQL through Sequelize and TypeORM (queries, migrations, transactions), MongoDB through Mongoose, and Redis for caching
• Implement RabbitMQ producers and consumers for cross-service events (notifications, audit history, role sync)
• Write unit and integration tests for everything you ship (Mocha/Chai/Sinon, Jest, Supertest)
• Participate in code review — receiving and giving feedback
• Help migrate legacy Express services to NestJS/TypeScript, following the patterns the team has established
• Debug issues in dev and staging environments using logs, correlation IDs, and APM traces

Must-Have

• 2–4 years backend development with Node.js in production (Express or NestJS)
• Solid JavaScript fundamentals: async/await and promises, closures, error handling; basic understanding of the event loop
• Working TypeScript knowledge, or strong JavaScript with clear willingness to work in TypeScript daily
• Hands-on SQL experience (PostgreSQL preferred) including writing queries and using an ORM; basic familiarity with MongoDB or Redis
• Experience writing tests for your own code — you don't need to be forced to test
• Comfortable with Git workflows, merge requests, and working from code review feedback
• Docker basics: running services with docker-compose, reading a Dockerfile

Nice-to-Have

• Message queue exposure (RabbitMQ, Kafka, or NATS)
• NestJS specifically (modules, providers, dependency injection)
• CI/CD exposure (GitLab CI or equivalent)
• Kubernetes basics