C++ Engineer - Market Data

Arcus Search; Greater London; On-site; GBP 90,000 - 150,000; Full time

Job summary

Arcus Search in London is seeking a Market Data Engineer to develop and optimise high‑performance market data feed handlers in modern C++. You will work on binary exchange protocols, exchange connectivity, and real‑time data delivery for trading and research workflows.

You’ll contribute to low-latency Linux environments, collaborate with quants and traders, and help scale systems across global markets, ensuring precision and reliability in data streams.

Qualifications

• Experience in modern C++ within market data or trading systems.
• Background with market data feeds and exchange connectivity.
• Experience with low-latency Linux environments.

Responsibilities

• Build and maintain high-performance market data feed handlers in C++.
• Implement and optimise binary exchange protocols across venues.
• Collaborate with trading and research teams to ensure timely data delivery.
• Improve latency, throughput and resilience of real-time data systems.
• Contribute to exchange connectivity and production stability.

Skills

Modern C++ (C++11/14/17+)

Market data feeds

Linux low-latency systems

Networking concepts

Binary protocols

Python (nice-to-have)

Distributed systems

Job description

I’m working with a leading quantitative research and trading firm looking to expand their Market Data Engineering team in London. This team sits at the core of a high-performance trading environment, building and optimising the systems that connect their platform to ~50 global exchanges. The focus is on low-latency data ingestion, exchange connectivity and reliable delivery of real-time market data into trading and research workflows.

The role

• Build and maintain high-performance market data feed handlers in modern C++
• Implement and optimise binary exchange protocols across multiple venues
• Work closely with trading and research teams to ensure timely, accurate data delivery
• Improve latency, throughput and resilience of real-time data systems
• Contribute to exchange connectivity, colocation setups and production stability

What they’re looking for

• Commercial experience in modern C++ (C++11/14/17+)
• Background working on market data feeds, exchange connectivity or trading systems
• Experience with low-latency systems in Linux environments
• Any experience with Python is a plus
• Understanding of networking concepts and binary protocols
• Exposure to high-throughput, real-time distributed systems

Environment

• High-performance, engineering-led culture with a focus on precision and long-term thinking
• Systems operating at significant scale across global markets
• Close collaboration between engineers, quants and traders
• Opportunity to work on problems where performance and correctness are critical