We’re looking for a Backend Developer who can take ownership of our backend systems and help us build, maintain, and scale reliable production applications.

You’ll work across APIs, databases, real-time communication, payments, deployments, monitoring, and performance optimization. We’re looking for someone who is comfortable owning backend problems end-to-end rather than only working on isolated tickets.

What You’ll Do

- Build, maintain, and optimize Node.js + Express backend services
- Design and develop scalable REST APIs
- Design and manage MongoDB / Mongoose schemas
- Build and maintain WebSocket / Socket.io based real-time features
- Integrate and maintain payment gateways such as Razorpay, Cashfree, PhonePe, or similar providers
- Build reliable transaction, wallet, ledger, and payout-related backend flows
- Work with Redis for caching, queues, and background processing
- Monitor production servers, logs, application health, and system performance
- Set up alerts and help respond to production incidents
- Identify performance bottlenecks and optimize APIs, databases, and backend services
- Manage deployments and basic production infrastructure
- Improve backend reliability, scalability, security, and error handling
- Debug and resolve production issues independently
- Work closely with frontend and product teams to ship features end-to-end

Must Have

- 1+ years of hands-on Node.js backend development experience
- Strong knowledge of Node.js and Express.js




- Strong understanding of MongoDB and Mongoose
- Positive understanding of REST API design and backend architecture
- Hands-on experience with WebSockets / Socket.io
- Experience integrating payment gateways
- Understanding of authentication, authorization, validations, and API security
- Basic DevOps knowledge including deployments, server logs, restarts, and production debugging
- Strong debugging and problem-solving skills
- Ability to understand and work with an existing production codebase

Good to Have

- Experience with Redis for caching or job queues
- Experience deploying applications on AWS, GCP, Railway, or similar platforms
- Experience with Docker and CI/CD
- Familiarity with load testing tools such as k6 or JMeter
- Experience working on high-read, high-concurrency, or real-time applications
- Knowledge of payment, fintech, transaction, or ledger systems
- Experience building scalable background jobs and asynchronous workflows

You’ll Thrive Here If

- You take ownership of production issues instead of waiting for someone else to assign them
- You care about metrics, monitoring, and reliability, not just whether a feature works
- You think about scalability and performance before they become major problems
- You can independently take a problem from requirement → development → deployment → monitoring
- You’re comfortable working in a fast-moving setting where backend ownership matters

📌 Back End Developer (Noida)
🏢 ChatSpark
📍 Noida