Senior C++ Developer ( Backend)

Delta6Labs FinTech Pvt Ltd; India; On-site; INR 4,000,000 - 7,000,000; Full time

Job summary

Delta6Labs FinTech Pvt Ltd in India is seeking a Senior C++ Developer to design and optimize low-latency trading systems for crypto markets. You will work on backend services such as order management, execution, and market data processing with a focus on scalability and reliability.

You will implement high-performance components, tune multithreaded code, and integrate with exchanges via REST, WebSocket, and FIX APIs in production environments.

Qualifications

• 6+ years of modern C++ experience, actively building with it daily.
• Strong depth in multithreading, concurrency, and Linux.
• Hands-on background building low-latency or high-performance backend systems.
• Experience with production-grade TCP/IP, WebSockets, and PostgreSQL.

Responsibilities

• Develop and tune low-latency trading systems for crypto markets.
• Build OMS, order routing, execution, and market data services.
• Integrate with exchanges via REST, WebSocket, and FIX APIs.
• Design backend APIs for orders, trades, and market data at scale.
• Investigate production issues and strengthen monitoring.

Skills

Modern C++ (C++17/20)

Multithreading

Linux

Low-latency / high-performance backend

TCP/IP

WebSockets

Tools

REST APIs

WebSockets

FIX APIs

PostgreSQL

Job description

We’re hiring a Senior C++ Developer to build and optimize low-latency, high-performance trading systems for crypto markets. You’ll be working on the backend services that actually run the trading engine, things like order management, execution, market data processing, and exchange integrations, all while keeping scalability, reliability, and raw performance front and center in an environment where milliseconds matter.

What You’ll Be Doing

• Developing and tuning low-latency trading systems built specifically for crypto markets
• Building out OMS, order routing, execution, and market data services from the ground up
• Integrating with exchanges over REST, WebSocket, and FIX APIs
• Designing backend APIs that handle orders, trades, and market data at scale
• Getting into the weeds on multithreaded application performance and reliability
• Tracking down production issues and tightening up system monitoring along the way

What We’re Looking For

• 6+ years working in Modern C++ (C++17/20), not just familiar with it, actually building with it day to day
• Real depth in multithreading, concurrency, and Linux; this role lives there
• Hands-on background building low-latency or high-performance backend systems
• Comfortable with TCP/IP, WebSockets, and PostgreSQL in production settings
• Experience in HFT, algorithmic trading, or OMS/EM work specifically