Senior Backend Developer (Node.js)

We’re looking for a Senior Backend Developer with 5+ years of professional experience, including 3+ years of hands-on Node.js expertise and strong knowledge of Golang, to help build and scale high-performance backend systems. You’ll work on complex technical challenges while collaborating closely with cross-functional teams. ✅ ResponsibilitiesBackend Development & Architecture:Design, develop, and maintain scalable backend services and APIs using Node.js and Golang, with a focus 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 RequirementsCore Skills:5+ years in backend development, with 3+ years of commercial Node.js experience.Solid experience with Golang, especially in building scalable APIs and microservices.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:Experience with serverless architectures (AWS Lambda, Serverless Framework).Familiarity 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.