Senior Backend Engineer

Job Description

Senior Backend Engineer (MERN Stack) Location: Sector 67, Gurgaon Experience: 3+ years Type: Full-time About Fairdeal.Market Fairdeal.Market is a rapidly growing B2B quick commerce company offering a wide range of products with delivery times as short as 20 minutes. Our mission is to ensure that every shopping bag worldwide can be filled efficiently and sustainably. Role Summary As a Senior Backend Engineer , you will be responsible for designing and implementing robust, scalable, and high-performance backend services. You will contribute to architectural decisions, solve complex technical problems, and mentor junior developers across the stack, with a strong emphasis on Node.js, Express.js, MongoDB , and backend architecture. Familiarity with Docker and CI/CD pipelines is plus. Key Responsibilities Architect and implement backend services and REST APIs using Node.js and Express.js. Design scalable data models and work with MongoDB and NoSQL databases efficiently. Solve complex problems related to performance, scalability, and data integrity. Ensure code quality through test coverage, peer reviews, and automated workflows. Collaborate with frontend developers, product managers, and DevOps for feature implementation. Lead the technical architecture of new features and services. Manage background jobs, queues, event-driven architecture. Ensure application security and data protection protocols. Optimize application for performance, scalability, and maintainability. Mentor and guide junior engineers, ensuring best coding practices are followed. Participate in sprint planning, technical discussions, and release management. Qualifications Education: B.Tech in Computer Science, Information Technology, or related field. 3+ years of hands-on experience with the MERN stack, especially in backend development. Proficiency in JavaScript and Node.js , with deep understanding of Express.js . Strong database knowledge, especially MongoDB , including schema design and optimization. Experience in architecting scalable backend systems . Familiarity with Docker , containerization concepts, and CI/CD pipelines (e.g., GitHub Actions, Jenkins, GitLab CI). Understanding of REST APIs, microservices, and API documentation (Swagger/OpenAPI). Familiarity with Redis, message queues (RabbitMQ, Kafka) is a plus. Strong problem-solving and analytical skills. Excellent written and verbal communication. Good to Have Exposure to cloud platforms like AWS (EC2, S3, Lambda). Experience with monitoring/logging tools (ELK Stack, Prometheus, Grafana). Knowledge of GraphQL , WebSockets , or gRPC . Contribution to open-source or public code repositories. Show more Show less