Hays Software Engineering are looking for a Principal Developer looking to take the next step in their career whilst also remaining hands-on in joining a new FX matching engine team within a world renowned Financial Services business. What you will be doing: Spearhead the design and development of a high-performance FX Exchange application, utilising Java as the primary language with foundational expertise in C++. Shape the technical vision, ensuring the implementation of robust, scalable, and secure FX trading solutions across FX Spot and FX Swaps products. Architect systems that adhere to key operational, risk management, and regulatory requirements. Optimise Java applications and fine-tune operating systems to maximise performance in high-frequency trading environments.What we are looking for: 10-15 years hands-on Java experience. Experience building FX trading applications. Experience within High Frequency Trading environments. Understanding of FIX protocol, Low Latency & binary protocols for market data.Benefits details: 25 annual leave days bank holidays. Performance bonus (20%) 5% non-contributory pension Cycle to work scheme £1,000 annual well-being sumHays Specialist Recruitment Limited acts as an employment agency for permanent recruitment and employment business for the supply of temporary workers. By applying for this job you accept the T&C's, Privacy Policy and Disclaimers which can be found at (url removed)