Node.js Developer

Responsibilities:

• Design and build NestJS microservices in TypeScript with clean module boundaries and dependency injection patterns.
• Build and maintain REST and GraphQL APIs consumed by web and mobile clients.
• Implement real-time event delivery to thousands of concurrent connected clients via WebSockets.
• Design MongoDB schemas for high-write, high-read workloads with proper indexing strategies.
• Build async job processing pipelines using Redis-backed queues with retry, backoff, and dead-letter handling.
• Write event-driven service communication: pub/sub, fan-out, and consumer group patterns.
• Own AWS deployments; containerized services on ECS, secrets management, and CloudWatch monitoring.
• Participate in code reviews and maintain architectural documentation.

The core requirements for the job include the following:

Backend:

• 3+ years building production backends with Node.js and TypeScript.
• Strong hands-on experience with NestJS: modules, dependency injection, guards, interceptors, and pipes.
• GraphQL: schema design, resolvers, and query execution.
• MongoDB: schema design, aggregation pipelines, and indexing strategies.
• Redis: caching, pub/sub, and job queue patterns.
• WebSockets / Socket.io : real-time bidirectional communication at scale.
• Experience designing for event-driven architectures, async messaging, fan-out, and idempotent processing.
• Solid understanding of the Node.js async model and concurrency patterns.
• REST API design: versioning, error handling, and pagination.

Cloud and DevOps:

• AWS: ECS Fargate, ALB, S3 CloudWatch, Secrets Manager, and IAM roles.
• Docker: writing Dockerfiles, multi-stage builds, and docker-compose for local development.
• CI/CD pipeline experience: GitHub Actions, Bitbucket Pipelines, or GitLab CI.

General:

• Understanding of distributed systems: consistency tradeoffs, failure modes, and fault tolerance.
• Experience building for high availability: retries, circuit breakers, and health checks.
• Clean Git workflow: PR reviews, branching strategy, and commit hygiene.

Good to Have:

• Kubernetes (EKS or self-managed).
• Apollo Federation: multi-service.
• GraphQL schema composition.
• Infrastructure as Code: Pulumi or Terraform.
• APM and observability: New Relic, Datadog, or Prometheus/Grafana.
• Load testing tools: Autocannon, k6 or similar.
• AWS Lambda and serverless patterns.
• MongoDB performance profiling, query analysis, iGaming, fintech, real-time gaming domain experience, and gRPC service communication.
• Tech Stack: Node.js, NestJS, TypeScript, GraphQL, MongoDB, Redis, BullMQ, and Socket.io .