Job Title: Senior Backend Engineer

Experience Required: 5-10 Years

Location: Mumbai

Employment Type: Full-Time

Department: Engineering - Backend Development

About the Role

We are seeking an experienced Senior Backend Engineer to join our team. The ideal candidate will have strong expertise in building scalable, high-performance backend systems with Node.js and cloud technologies. You will be responsible for developing and maintaining our cloud-based PC services platform that serves millions of users.

Key Responsibilities

• Design, develop, and maintain robust RESTful APIs and WebSocket services for real-time communication
• Build and optimize scalable microservices architecture using Node.js and Express.js
• Implement and manage cloud infrastructure on Azure and Google Cloud Platform
• Design and optimize database schemas and queries for MongoDB
• Develop real-time features using WebSocket protocols and SocketCluster
• Implement secure authentication and authorization mechanisms (JWT, OAuth)
• Build and maintain background job processing systems using message queues
• Integrate with third-party APIs and services
• Write clean, maintainable, and well-documented code
• Implement monitoring, logging, and alerting solutions
• Participate in code reviews and maintain code quality standards
• Mentor junior developers and contribute to technical documentation
• Collaborate with frontend developers, DevOps, and product teams

Required Technical Skills

Core Technologies (Must Have)

• Node.js (v18+): 5+ years of production experience with Node.js backend development
• Express.js: Strong expertise in building RESTful APIs with Express.js framework
• MongoDB: 3+ years experience with MongoDB, Mongoose ORM, schema design, and query optimization
• Redis: Experience with caching strategies, session management, and distributed locks using Redis
• JavaScript/ES6+: Advanced proficiency in modern JavaScript, asynchronous programming, and design patterns

Cloud & Infrastructure

• Azure Services: Hands-on experience with Azure Event Hubs, Azure DevOps, and Azure deployment
• Google Cloud Platform (GCP): Experience with GCP Compute Engine, Cloud Storage, and Pub/Sub
• Docker: Containerization experience and Docker deployment strategies
• CI/CD: Experience with Azure Pipelines and automated deployment workflows

Real-time & Messaging

• WebSocket: Strong understanding of WebSocket protocol and real-time communication patterns
• Message Queues: Experience with AMQP, RabbitMQ, or similar message broker systems
• Background Jobs: Experience with job scheduling systems (Agenda, Bull, or similar)

Authentication & Security

• JWT/OAuth: Strong understanding of token-based authentication and authorization
• Security Best Practices: Knowledge of OWASP Top 10, input validation, rate limiting, and API security
• Encryption: Experience with bcrypt, password hashing, and data encryption

API Development & Documentation

• RESTful API Design: Expertise in designing scalable and maintainable REST APIs
• API Documentation: Experience with Swagger/OpenAPI specification
• API Versioning: Understanding of API versioning strategies

Development Tools & Practices

• Git: Proficient with Git workflows, branching strategies, and code collaboration
• Testing: Experience with Jest, unit testing, integration testing, and test-driven development
• Code Quality: Familiarity with ESLint, Prettier, and code review processes

Monitoring: Experience with Prometheus, application monitoring, and observability