Head of HFT Platform Engineering

Fionics; New York (NY); On-site; USD 240,000 - 420,000; Full time

Job summary

Fionics in New York is seeking a Head of Platform Engineering to own the architectural direction of high-frequency trading systems. You will modernise the stack, lead a hands-on engineering team, and stay actively coding alongside traders to align with firm priorities.

The ideal candidate has a strong background in HFT environments, deep C++ expertise, and a track record of end-to-end system ownership from conception to production.

Qualifications

• Proven track record in low-latency trading systems.
• Experience owning systems end-to-end.
• Relocation to New York preferred.

Responsibilities

• Define architecture and technical direction for trading systems.
• Modernise and evolve low-latency C++ codebase.
• Lead and mentor engineering team.
• Stay hands-on and write production code.
• Collaborate with traders and founder on priorities.

Skills

C++

Low-latency

Team leadership

System ownership

Job description

Head of Platform Engineering — High-Frequency Trading

New York, NY

A New York HFT that has been consistently profitable for over a decade and doubled its PnL last year. Small, well-capitalised and deliberately low-profile, they're looking for one person to own their engineering function end to end.

This is a rare ownership seat. You'll set the technical direction, modernise the stack, grow & lead the team, and stay hands-on in the code.

WHAT YOU'LL DO

• Own the architecture and technical direction of the trading systems
• Modernise and evolve an established low-latency C++ codebase
• Lead and mentor the engineering team
• Stay hands-on — design and write production code, not just manage
• Work directly with traders and the founder on firm priorities

WHAT YOU'LL BRING

• A strong engineering background from another HFT or top-tier trading firm
• Deep, hands-on expertise in low-latency systems (C++)
• A track record of owning systems end to end, ideally somewhere you've seen the whole picture rather than one narrow lane
• The judgement to lead and set direction while staying technical
• Based in, or willing to relocate to, New York