Java API Engineer – Low-Latency FIX & Cloud

Company: IG Group
Apply for the Java API Engineer – Low-Latency FIX & Cloud
Location: London
Job Description:

Requirements

  • Experience with developing external APIs
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  • A continuous improvement mentality, experience with coding using AI
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  • Identifies development risks and builds mitigations
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  • Around 5 years of Java development experience
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  • Strong concurrent/multithreaded programming skills
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  • Experience with asynchronous systems (streaming, messaging)
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  • Experience using the Spring Framework
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  • Linux proficiency, including shell scripting
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  • Experience with cloud (ideally AWS)

What the job involves

  • You’ll be at the heart of IG’s institutional growth strategy—building the APIs that traders rely on every day
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  • Your work directly enables IG Prime to onboard new clients, expand into new markets, and deliver the low-latency, reliable connectivity that institutional traders demand
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  • You’ll help grow the product offering by designing and delivering new API capabilities that meet evolving client needs
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  • Whether you’re shipping new features, hardening existing services, or collaborating with stakeholders to solve integration challenges, your contributions will have a real impact
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  • Develop and maintain IG’s FIX APIs
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  • Help deliver the IG Prime division’s product roadmap of new functionality
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  • Provide technical support to IG’s clients and FIX Support teams when required
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  • Monitor and manage FIX API services with a focus on performance, reliability, and resilience
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  • Collaborate with business stakeholders to improve processes and deliver excellent service
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  • Build test harnesses and increase automation across the FIX platform

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Posted: May 28th, 2026