Role & responsibilities

Senior Backend Engineer

Own and build the high-performance backend systems behind a live derivatives exchange. This is core-platform work: order flow, market data, risk, ledger, and settlement systems, where an off-by-one in a balance calculation is a production incident, not a bug ticket.

What You'll Do

- Own end-to-end design, development, and delivery of backend services - from spec through production and on-call
- Architect and build scalable APIs and microservices, including public-facing REST and WebSocket APIs and client SDKs
- Build real-time market data and order-flow paths: streaming ingestion, fan-out to thousands of concurrent WebSocket clients, and backpressure handling under load
- Implement financially correct logic - exact-precision arithmetic, idempotent order and transfer handling, double-entry ledger discipline, and reconciliation jobs
- Design and optimise database schemas across relational, NoSQL, and time-series systems
- Work with event-driven infrastructure (Kafka / NATS or similar) for order events, fills, and downstream consumers
- Write clean, well-tested, maintainable code - including deterministic tests for money-touching paths
- Collaborate with DevOps to deploy and monitor services in containerised, cloud-native environments
- Set up and use observobservability tooling - metrics, logs, traces, and latency SLOs - to proactively find and resolve issues
- Mentor engineers, run code reviews, and drive engineering standards across the team




- Participate in system design reviews and technical decision-making

What We're Looking For
- 5+ years of professional backend development experience
- Strong hands-on experience with Node.js and NestJS in production
- Solid grounding in data structures, algorithms, concurrency, and problem-solving
- Experience with AWS: EC2, Lambda, and EKS
- Solid experience with PostgreSQL and MySQL; working knowledge of MongoDB
- Experience designing and operating high-throughput, low-latency APIs - including WebSocket services at scale
- Working knowledge of Prometheus, Grafana and Loki
- Practical experience with caching and in-memory data stores (Redis or equivalent)
- Demonstrated ownership mentality - able to independently drive a feature from concept to production
- Strong leadership qualities, with experience guiding or mentoring engineers
- Excellent debugging, system design, and communication skills

Preferred candidate profile

Nice to Have

- Prior experience in fintech, trading, brokerage, payments, or other transaction-critical systems
- Familiarity with exchange concepts: order books, matching, margin, liquidation, funding rates, settlement
- Experience integrating third-party exchange or liquidity provider APIs (REST + WebSocket)
- Time-series databases such as TimescaleDB
- Event-driven architectures and message queues at scale
- Exposure to Rust, Go, or another systems language used alongside a Node.js service layer
- Experience with API security: authentication, key management, rate limiting, replay protection

📌 Senior Backend Engineer (Mumbai)
🏢 Graviti Exchange
📍 Mumbai