• Design scalable, fault tolerant, and high availability backend systems using Node.js • Define microservices, event driven, and API first architectures • Create low level and high level design documents (LLD/HLD) • Establish coding standards, best practices, and architectural guidelines • Evaluate and recommend frameworks, libraries, and tools • Lead complex backend development initiatives using Node.js (Express/NestJS/Fastify) • Review code for performance, security, maintainability, and scalability • Mentor senior and junior developers; conduct design and code reviews • Collaborate with frontend, DevOps, QA, and product teams • Optimize application performance, memory usage, and async workflows • Implement authentication, authorization, and data security best practices • Design logging, monitoring, alerting, and observability solutions • Ensure compliance with security standards and data protection policies • Design cloud native solutions on AWS / Azure / GCP • Work closely with DevOps on CI/CD pipelines, containerization, and deployments • Guide infrastructure design using Docker, Kubernetes, and IaC • Ensure system resilience and disaster recovery strategies