Ultra-Low Latency C++ Engineer for HFT Systems

Margo Group; Greater London; Hybrid; GBP 110,000 - 150,000; Full time

Job summary

MARGO in London is seeking a C++ Software Engineer to join latency-sensitive trading infrastructure in HFT environments. You will design and optimize ultra-low latency components, work on market data processing and order routing, and collaborate with infrastructure teams.

The role emphasizes speed, determinism, and ownership, with potential interaction with C# outside the critical path. Core tech includes Linux, lock-free programming, and advanced memory and CPU optimizations.

Qualifications

• Strong experience in C++ for performance-critical or low-latency systems.
• Proven background in HFT or ultra-low latency trading environments.
• Deep understanding of CPU architecture, caches and memory models.

Responsibilities

• Design, develop and optimise ultra-low latency C++ trading components.
• Work on critical execution paths for market data processing and order routing.
• Implement lock-free and wait-free algorithms.
• Analyse CPU behaviour and work with infra teams on kernel bypass / user-space networking.
• Ensure correctness, determinism and stability of production trading systems.

Skills

C++ development

Performance-critical systems

HFT/low latency

Linux internals

Concurrency & memory ordering

CPU architecture

Tools

DPDK

Solarflare Onload

Job description

MARGO in London is seeking a C++ Software Engineer to join latency-sensitive trading infrastructure in HFT environments. You will design and optimize ultra-low latency components, work on market data processing and order routing, and collaborate with infrastructure teams.

The role emphasizes speed, determinism, and ownership, with potential interaction with C# outside the critical path. Core tech includes Linux, lock-free programming, and advanced memory and CPU optimizations.