Quantitative Developer – Backend & Real-Time Systems

Experience: 4–5 Years

Location: Mumbai

Employment Type: Full-Time | Work from Office

CTC: Up to ₹15 LPA

About GreyOak

GreyOak Capital Intelligence is an early-stage financial-market intelligence startup building quantitative systems and data-driven products for traders, investors and financial institutions.

We are looking for a Quantitative Developer who can take end-to-end ownership of our quantitative backend infrastructure — from implementing research and backtesting systems to real-time market data, APIs, WebSockets and production deployment.

Key Responsibilities

- Convert quantitative research into reliable production systems.
- Build and maintain strategy, signal and backtesting engines.
- Develop multi-stock and multi-timeframe quantitative systems.
- Build and manage historical and real-time market-data pipelines.
- Handle WebSocket feeds, live data processing and connection reliability.
- Build backend APIs and services for quantitative outputs.
- Work with PostgreSQL, Redis and large financial datasets.
- Conduct walk-forward, out-of-sample and robustness testing.
- Prevent look-ahead bias, data leakage, survivorship bias and overfitting.
- Optimise Python workloads for performance and scalability.
- Handle deployment, debugging, monitoring and production issues.




- Work closely with Quant Researchers and take ownership from research implementation through production deployment.

Required Skills
- 4–5 years of experience in Quantitative Development, Algorithmic Trading, Systematic Trading or backend engineering within financial markets.
- Strong Python and SQL.
- Solid knowledge of NumPy, Pandas, Polars and SciPy.
- Experience building backtesting, strategy or signal-generation systems.
- Experience with REST APIs and WebSockets.
- Strong understanding of financial time-series and market data.
- Experience with PostgreSQL and Redis.
- Working knowledge of Git, Linux and Docker.
- Ability to independently design, build, test and maintain production systems.

Good to Have
- Experience with NSE/BSE markets.
- Broker APIs and real-time market-data feeds.
- FastAPI, Django or Flask.
- AWS, DigitalOcean, GCP or similar cloud infrastructure.
- Numba, Cython or C++.
- Previous experience at a prop firm, broker, fintech or quantitative trading company.

Who We Are Looking For We need someone comfortable working in a fast-moving startup environment who can independently take ownership across:

Research Implementation → Backtesting → Backend → Real-Time Data/WebSockets → Production → Monitoring

📌 Quantitative Developer – Backend & Real-Time Systems (Mumbai)
🏢 GreyOak Capital Intelligence
📍 Mumbai