Senior Software Engineer (Python)

Were hiring a Senior Software Engineer (Python) - Trading Systems to own and evolve a production options trading system. It runs during market hours, ingests real-time market data, and requires profiling-led performance engineering to keep p50/p99 latency, jitter, and reliability within tight bounds.

Youll take meaningful ownership day-to-day, partnering closely with the founder and the engineering team to prioritise work, ship improvements quickly, and keep the system fast, reliable, and correct.

Who this is for

• This role is for engineers who have built and owned real-time, performance-critical systems.
• It is not suitable for candidates whose experience is mainly web product development (frontend-heavy or CRUD backends).
• Were looking for proven experience with measuring and improving p99 latency/jitter and operating systems during time-critical windows.
• Must be based in the UK and with a legal right to work in the UK

Location: UK-based

Working style: Mostly remote, occasional in-person days for planning/coordination

Support: Availability during core market hours required

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