Lead - Backend Developer

Role Overview: As a Lead - Backend Developer at WrkTalk DigiSec AI Pvt Ltd, you will be responsible for taking full ownership of the backend systems. Your role will involve driving architecture, development, and cross-functional collaboration. This hands-on leadership position will require you to build scalable and secure systems, guide technical decisions, and mentor a growing team as the company scales. Key Responsibilities: - Own the real-time communication backend supporting 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 to ensure 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. - Collaborate closely with product managers, design, and frontend teams to deliver features that are fast, secure, and reliable. - Write clean, well-tested code and contribute to defining 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 enhance reliability as the user base grows. - Establish and enforce engineering best practices related to code quality, testing, version control, and CI/CD. - Monitor and enhance 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 up-to-date technical documentation for APIs, system architecture, and deployment guides to ensure team-wide clarity 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 enhance backend systems and team efficiency. Qualifications Required: - Bachelor's 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. - Proficiency 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.,