Role & responsibilities Own the real-time communication backend powering enterprise messaging, voice, and video calling systems. Lead microservices architecture across multiple services and repositories using Node.js (TypeScript), Express.js, and NestJS. Optimize real-time performance ensuring low-latency communication and seamless scaling for enterprise deployments. Design scalable messaging systems with pub/sub patterns, queue management, and session handling. Lead and mentor a team of 5+ backend engineers through technical challenges, code reviews, and architectural decisions. Work hand-in-hand with product manager, design, and frontend teams to ship features that are fast, secure, and reliable. Write clean, well-tested code and help define engineering best practices across the stack. Manage containerized deployments using Docker and Kubernetes for on-premise client environments. Design database schemas, manage integrations, and optimize performance across SQL and NoSQL databases (e.g., MongoDB, MySQL). Optimize database performance, scale services, and improve reliability as our user base grows. Establish and enforce engineering best practices around code quality, testing, version control, and CI/CD. Monitor and improve system health using observability tools (e.g., logs, metrics, alerts). Ensure application reliability through automated testing, logging, and monitoring. Troubleshoot complex production issues across diverse client environments and infrastructure setups. Maintain clear, up-to-date technical documentation for APIs, system architecture, Deployment guides to support team-wide clarity and client-specific configurations. Maintain technical documentation for APIs, deployment guides, and client-specific configurations. Mentor junior engineers, lead by example, and contribute to building a high-performance engineering culture. Evaluate and integrate new technologies, tools, and patterns to improve backend systems and team efficiency. Stay current with the latest trends and best practices in backend development and bring innovation to projects. Preferred candidate profile Bachelors degree in computer science, Engineering, or a related field 6+ years of experience building scalable backend services using Node.js/Nest.js. Deep expertise in asynchronous programming, event-driven architecture, and design patterns. Proficient in designing and integrating RESTful APIs, web services, and backend libraries. Strong command over MongoDB, Postgres, or similar relational/NoSQL databases. Familiarity with Docker, Git, Postman, and API documentation tools (e.g., JSdocs, Swagger). Solid understanding of frontend fundamentals (HTML5, CSS3, JavaScript) to collaborate across the stack. Experience with cloud platforms (e.g., AWS, GCP, Azure) and CLI operations. Competence in test-driven development, writing unit/integration tests, and working in Agile environments. Excellent problem-solving and communication skills; capable of translating complex requirements into elegant code. Ability to work independently and drive projects while mentoring junior team members.