Senior C++ Developer with Market Data Experience

Salary: £48,000 - 68,000 per year

Requirements:

• Strong proficiency in modern C++ (C++17/20 or later)
• Hands-on experience with Market Data
• Solid understanding of concurrency and synchronization (lock-free / low-lock patterns, atomics, memory models, etc.)
• Proven experience building performance-critical, real-time, or low-latency systems (e.g., networking, trading systems, telemetry, gaming engines, or similar)
• Strong knowledge of computer science fundamentals: data structures, algorithms, memory management, and optimization
• Practical experience with Linux systems programming (sockets, epoll/select, threads, memory management, CPU affinity, etc.)
• Experience using profiling, benchmarking, and performance analysis tools (e.g., perf, valgrind, flame graphs, CPU/memory profilers)
• Proficiency with version control (Git) and standard build systems (CMake, Ninja, etc.)
• Excellent problem-solving skills and attention to detail; ability to work in a fast-paced environment
• English: B2 Upper Intermediate
• Seniority: Senior
• Location: London, United Kingdom of Great Britain and Northern Ireland

Responsibilities:

• Design, implement, and maintain high performance C++ services handling high message rates and low latency workloads
• Optimize existing components for latency, throughput, and CPU/memory efficiency
• Develop and tune networking, messaging, and I/O layers to handle large data volumes reliably
• Profile and debug performance issues at application, OS, and network levels
• Collaborate with quantitative, trading, and infrastructure teams (or analogous business/tech teams) to translate requirements into robust technical solutions
• Write clean, production quality code with appropriate tests and documentation
• Participate in code reviews, design discussions, and continuous improvement of engineering practices

Technologies:

• Bash
• Git
• Hardware
• Linux
• Network
• PyTorch
• Python
• RDMA
• pandas
• C++
• VR

More:

We are looking for a C++ engineer to design and build high performance, low latency applications that process large volumes of real time data. We work on systems where microseconds and throughput matter, optimizing every layer from algorithms and data structures to networking and OS interaction. The compensation for this role in NYC is 140000-200000 USD gross per year, based on the interview process results. Nice to have includes experience with kernel bypass or user space networking technologies such as DPDK, RDMA, VMA, or Solarflare/OpenOnload; financial markets, market data distribution, order routing, or exchange connectivity; market data protocols such as FIX, MDP, ITCH, or proprietary exchange feeds; multicast, low latency networking, and clock synchronization such as PTP; hardware aware optimization including NUMA, cache optimization, vectorization/SIMD, and CPU pinning; monitoring and telemetry for high performance systems; scripting languages such as Python or Bash for tooling and automation; and KDB+ data analysis with Python tools such as pytorch, pandas, and arrow.

last updated 36 week of 2026