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Senior Java/FIX Engineer - IG Prime
Production I.G · City of London - United Kingdom · Posted 21 days ago
Lead modernization of IG's FIX infrastructure serving institutional clients handling billions in daily transactions with real-time latency requirements.
Job Title Senior Java/FIX Engineer - IG Prime Job Description Prime Java/FIX Engineer
IG Group is a FTSE 100 fintech operating across five continents, serving over 1.4m customers and handling billions of dollars in transactions – built on scale, trust, and proof. We didn't pivot to innovation; it's how we've always operated. What that means for the people who work here is real: genuinely complex problems to solve, the technology and resources to tackle them properly, and the kind of scope that's rare in established businesses.
Join IG's public-facing API team, who own open spec trading APIs and FIX protocol using cutting edge tech for IG intuitional clients. Delivering secure, high-performance, low-latency solutions.
Your role in the Team’s Success:
Our team sits within the IG Prime division, building the institutional side of IG's business. The Prime API team owns the APIs that connect IG to institutional clients, brokers and partners across global markets — the trading and market-data plumbing that our largest clients depend on every trading day. Maintaining and modernising our FIX-based APIs is one of the team's core functions, and it's the area this role would lead on. That means real-time price distribution, order and execution flow, and reference data, running continuously through the trading day. When these systems degrade, clients notice immediately — so resilience, correctness and latency aren't aspirations here, they're the job. You'll join at a genuinely interesting point: we're building a new suite of cloud-native trading APIs alongside modernising our existing FIX estate. There's greenfield work and there's hard, high-stakes work on live systems, and you'd get both.
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