Quantitative Developer; Rust​/C++

Tech Shack City Of London, England, United Kingdom

This range is provided by Tech Shack. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more.

Direct message the job poster from Tech Shack

Tech Shack are working with a high-performing quantitative trading firm building out their HFT desk. They trade globally across major liquidity venues and are hiring a Front Office Trading Systems Engineer (Rust/C++) to work on the hot path - the systems closest to trading and PnL.

This is a Rust-first role (production Rust), but open to elite C++ engineers who are happy to work Rust day-to-day.

Location: London preferred (hybrid). Remote considered for exceptional profiles, but priority is London-based candidates.

Compensation: £150,000 - £250,000 total comp + meaningful PnL-linked upside (role and impact dependent).

You’ll sit with senior engineers and work directly with traders/quants to build and optimise the top layer of the stack:

• Tail latency / jitter work: profiling, instrumentation, removing bottlenecks, improving p99/p999 behaviour under load.
• Low‑latency engineering: CPU affinity, memory layout, lock‑free patterns, async/event‑driven systems, network behaviour.
• Production outcomes: robustness, observability, and performance that holds up in live trading (not "lab only").
• Desk adjacency: translating research/ideas into production trading behaviour alongside quants.

• 3+ years in performance‑critical systems.
• Proven low‑latency / HFT trading background (prop, market maker, quant fund, or equivalent).
• Strong hands‑on Rust or C++ in production (Go considered if the latency story is real).
• Evidence you’ve owned meaningful parts of FO systems (not just generic infra), e.g.
  market data handlers, order gateway, execution/routing, pricing/risk checks, simulation/backtesting support
  .
• Comfortable explaining what you changed,
  how you measured it
  , and the impact on latency/throughput/stability.

• Exchange protocols (FIX, ITCH/OUCH/binary feeds, multiplexed Web Sockets), colocation realities, Aeron/SBE.
• Kernel bypass / DPDK / tuning.

• Real upside tied to desk performance.
• Small, senior team - you’ll ship things that matter.

If you’ve built front‑office trading systems in production (market data / execution / risk / routing), apply to this advert or reach out directly to discuss the details on a call.