Lead - Backend developer

Job Title: Backend Developer - Lead

Company: WrkTalk DigiSec AI Pvt Ltd

Location: Juinagar, Navi Mumbai (On-site)

Employment Type: Full-Time | Senior-Level

Position Overview

We are looking for a Lead - Backend Developer to take full ownership of our backend systems—driving architecture, development, and cross- functional collaboration. This is a hands-on leadership role where you'll build scalable, secure systems, guide technical decisions, and mentor a growing team as we scale

Key Responsibilities

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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.

Required Skills & Qualifications

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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.
• 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.

What We Offer

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A performance-driven and innovation-centric environment with rapid career advancement.

• Technical leadership opportunities and exposure to a wide range of modern tech stacks.
• High-ownership role with influence over product and tech decisions.
• Dynamic, collaborative, and fast-paced work environment.
• Direct collaboration with founders and senior leadership of WrkTalk.
• Collaborative, start-up-style culture that rewards initiative, creativity, and ownership. WrkTalk