Low-Latency C++ Engineer for HFT Trading, PnL Impact

QNT Partners; United States; Remote; USD 180,000 - 300,000; Full time

Benefits offered by this job

Competitive compensation

Performance upside

Job summary

QNT Partners seeks an elite C++ engineer to join its fast-moving HFT group in the United States. You’ll write and tune the core trading stack, pushing for speed, safety and determinism while owning impactful code paths.

Work with top traders and researchers to optimize latency, memory layout, and CPU caches. Expect a flat, ownership-driven team where your work directly influences PnL and production-grade tooling and deployment.

Qualifications

• Minimum 2+ years building high-frequency/low-latency trading systems.
• Expertise in modern C++ (C++20+) and thoughtful use of features.
• Fluency with Linux, network stack, and system calls.
• Strong understanding of memory layouts, caches, and lock-free tech.
• Experience with performance profiling to validate improvements.
• Experience collaborating with traders/researchers to productionize ideas.

Responsibilities

• Build and optimise ultra-low-latency C++ for core trading and market connectivity systems.
• Hunt down jitter, cache misses and branch mispredictions, and measure everything twice.
• Work closely with traders and researchers to turn their ideas into production code, fast.
• Help shape tooling, testing and deployment so it can ship safely and often.
• Review code, share knowledge and make the team sharper.

Skills

High-frequency trading experience

C++20+

Linux proficiency

Performance profiling

Memory/CPU architecture

Networking & OS fundamentals

Job description

QNT Partners seeks an elite C++ engineer to join its fast-moving HFT group in the United States. You’ll write and tune the core trading stack, pushing for speed, safety and determinism while owning impactful code paths.

Work with top traders and researchers to optimize latency, memory layout, and CPU caches. Expect a flat, ownership-driven team where your work directly influences PnL and production-grade tooling and deployment.