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Senior Backend Developer (Node.js)
Senior Backend Developer (Node.js)OnHires • San Francisco, California, United States
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Senior Backend Developer (Node.js)

Senior Backend Developer (Node.js)

OnHires • San Francisco, California, United States
[job_card.30_days_ago]
[job_preview.job_type]
  • [job_card.full_time]
[job_card.job_description]

We’re looking for a Senior Backend Developer with 5+ years of professional experience and 3+ years of hands-on Node.js expertise to build and scale high-performance backend systems. You’ll work on complex technical challenges while collaborating closely with cross-functional teams.

✅ Responsibilities

Backend Development & Architecture :

  • ️ Design, develop, and maintain scalable backend services and APIs using Node.js, focusing on performance, security, and reliability.
  • ️ Architect REST / GraphQL APIs with best practices for rate limiting, idempotency, and versioning.
  • ️ Implement event-driven architectures using message brokers (RabbitMQ, Kafka) and real-time systems (WebSockets / Socket.io).
  • ️ Optimize MySQL / PostgreSQL databases through query tuning, indexing, and sharding strategies.
  • ️ Build and maintain caching layers with Redis (e.g., cache invalidation, clustering, Lua scripting).

System Integration & Collaboration :

  • ️ Integrate third-party APIs (payment gateways, authentication services) with fault tolerance and retry logic.
  • ️ Collaborate with frontend and DevOps teams to design cloud-native solutions (AWS / GCP / Azure) and containerized deployments (Docker / Kubernetes).
  • ️ Write clean, maintainable code following SOLID principles and participate in rigorous code reviews.

    • Performance & Troubleshooting :

  • ️ Identify and resolve bottlenecks in distributed systems, including database latency, message queue tuning, and API performance.
  • ️ Implement monitoring and logging (Prometheus, Grafana, ELK Stack) for production systems.
  • ️ Conduct root cause analysis (RCA) for critical issues and implement preventive measures.

    • Process & Best Practices :

  • ️ Advocate for test-driven development (TDD) and write automated tests (Jest, Mocha, Cypress).
  • ️ Contribute to CI / CD pipelines (GitHub Actions, Jenkins) and infrastructure-as-code (Terraform).
  • ️ Document technical designs, API specs (Swagger / OpenAPI), and system architecture.

    • ✅ Technical Requirements

    Core Skills :

  • ️ 5+ years in backend development, with 3+ years of commercial Node.js experience.
  • ️ Expertise in Node.js frameworks : Express.js, NestJS, Fastify.
  • ️ Advanced proficiency in JavaScript / TypeScript (ES6+, async / await, streams).
  • ️ Deep understanding of REST / WebSocket APIs and microservices architecture.

    • Databases & Tools :

  • ️ MySQL / PostgreSQL : Complex query optimization, replication, ORMs (Sequelize / TypeORM).
  • ️ Redis : Cache strategies, pub / sub, and persistence configurations.
  • ️ RabbitMQ / Kafka : Message queuing, event streaming, and dead-letter handling.

    • DevOps & Cloud :

  • ️ Experience with AWS / GCP / Azure (Lambda, EC2, S3, Cloud Functions).
  • ️ Proficiency in Docker and basic knowledge of Kubernetes.
  • ️ Familiarity with infrastructure-as-code (Terraform, CloudFormation).

    • Bonus Skills :

  • ️ Knowledge of serverless architectures (AWS Lambda, Serverless Framework).
  • ️ Experience with GraphQL (Apollo Server, schema design).
  • ️ Understanding of security practices (JWT, OAuth2, encryption).

    • Soft Skills :

  • ️ Advanced English for clear technical documentation and team collaboration.
  • ️ Strong problem-solving skills and attention to detail.
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