Senior Financial Engineer

Title: Senior Full Stack Developer Salary: Up to £120,000 Plus bonus! Location: London (Hybrid) iO Associates is working with a global FinTech powerhouse that\’s leading the charge in delivering high-performance electronic trading platforms for institutional clients – and they\’re now looking for a Senior Full Stack Developer with Trading experience to join their growing engineering team! This is a fantastic opportunity to take ownership of a cutting-edge trading product and play a key role in building scalable, client-facing solutions using modern JavaScript technologies. Designing and developing robust full stack applications using React.js (v16+) and Node.js Working directly with proprietary trading engines to create high-performance tools Building white-label trading platforms tailored to client needs Contributing across the full software life cycle, from design to production support Competitive salary plus bonus scheme ~ Flexible working hours ~25 days holiday plus bank holidays ~ Learning and development opportunities ~ This is a career-defining role where you\’ll have real influence over the architecture, performance, and evolution of a world-class trading solution.