Backend Developer

Required Qualifications

Node.js: 6+ years of professional experience building backend applications with Node.js, with a strong understanding of the event loop, asynchronous programming (Promises, async/await), and streams.

TypeScript: Strong proficiency in TypeScript, including types, interfaces, generics, and decorators.

NestJS: Hands-on experience building production applications with NestJS, including modules, controllers, providers, dependency injection, guards, interceptors, pipes, and middleware.

Microservices: Proven experience designing and building microservices, including service decomposition, inter-service communication (REST, gRPC, or message-based), and NestJS microservice transports.

Message brokers: Experience with at least one message broker such as RabbitMQ, Kafka, Redis Pub/Sub, or NATS for event-driven and asynchronous communication.

Docker: Strong experience containerizing applications, writing optimized multi-stage Dockerfiles, and using Docker Compose for local multi-service environments.

APIs: Experience designing and documenting RESTful APIs (with Swagger/OpenAPI); familiarity with GraphQL is a plus.

Databases: Solid experience with relational databases (PostgreSQL or MySQL) and ORMs like TypeORM or Prisma, plus working knowledge of MongoDB (Mongoose) and Redis for caching.

Server-side fundamentals: Strong understanding of authentication and authorization (JWT, OAuth2, Passport.js), request validation (class-validator), error handling, logging, and securing APIs against common vulnerabilities.

Testing: Experience writing unit, integration, and end-to-end tests using Jest and Supertest.

Git: Proficiency with Git, branching strategies, and code review workflows.

Preferred Qualifications

Kubernetes: Experience deploying and managing containerized microservices with Kubernetes or a similar orchestrator.

Microservice patterns: Familiarity with API gateways, service discovery, circuit breakers, the Saga pattern, CQRS, and event sourcing.

Cloud: Experience with AWS, GCP, or Azure (e.g., ECS/EKS, Lambda, RDS, SQS/SNS).

CI/CD: Experience building pipelines with GitHub Actions, GitLab CI, or Jenkins.

Observability: Experience with centralized logging and monitoring tools such as Prometheus, Grafana, ELK, or OpenTelemetry for distributed tracing.

Performance: Experience profiling Node.js applications and optimizing for high throughput and low latency.

Soft Skills

Problem-solving: Able to debug issues that span multiple services and trace failures across distributed systems.

Communication: Clearly explains technical decisions and collaborates well with frontend, DevOps, and product teams.

Ownership: Takes features from design through deployment and supports them in production.

Teamwork: Comfortable working in Agile teams and giving and receiving constructive code reviews.

Key Responsibilities

Design, develop, and maintain scalable microservices using Node.js and NestJS.

Build and maintain secure, well-documented APIs for internal and external consumers.

Implement event-driven communication between services using message brokers.

Containerize services with Docker and support their deployment across environments.

Write clean, testable, and maintainable code following best practices.

Monitor, troubleshoot, and improve the performance and reliability of production services.