Senior Fullstack Engineer

Title: Senior Full Stack Developer (React & Node)

Salary: Up to £110,000 D.O.E

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 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.

What you\’ll be doing:

• 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
• Collaborating with global trading and research teams to deliver innovative features
• Contributing across the full software lifecycle, from design to production support

What you\’ll get:

• Competitive salary plus bonus scheme
• Flexible working hours
• 25 days holiday plus bank holidays
• Learning and development opportunities
• And more!

This is a career-defining role where you\’ll have real influence over the architecture, performance, and evolution of a world-class trading solution. If you thrive in a fast-paced, high-impact environment – this one\’s for you.

If you\’re interested in this role or know someone who would be, then please apply to this advert and email a. methula@ ioassociates.co. uk

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