Front End Tech Lead (React)

Contact email: Job ref: BBBH Title: Lead Frontend Engineer (React) Salary: Up to £90,000 per annum Location: Belfast (Hybrid 2x PW) Are you a Lead Frontend Developer looking for your next opportunity? If so iO Associates is exclusively working with a fast-growing team of engineers, researchers, and designers based in Belfast, building smarter, safer AI solutions for regulated industries. As AI transforms the way organisations operate, our clients bridge the gap between opportunity and implementation, helping clients in defence and the private sector solve complex challenges with responsible, cutting-edge technology. What they're looking for! They're looking for a Lead Frontend Engineer to join their product engineering team and play a key role in shaping the technical direction of their AI-powered platforms. You'll take ownership of building intuitive, high-performance user interfaces, contribute to architectural decisions, and mentor others in a collaborative, product-driven environment. What You'll need: 8 years of experience in frontend development, with deep knowledge of JavaScript/TypeScript. Proven expertise in React, or similar frameworks. Solid understanding of state management (e.g., Redux, Pinia) and component-based architecture. Experience integrating with RESTful and GraphQL APIs. Familiarity with performance optimisation, accessibility best practices, and cross-browser compatibility. Strong communication skills and a collaborative mindset. A track record of technical leadership and mentoring. Nice to Have Exposure to backend systems or full-stack development. Experience with AI/ML platforms or data-heavy applications. Familiarity with secure or regulated industry environments. What you get: 25 days holidays, plus bank holidays life assurance Private Medical cover Flexible working And more! Our client has a 2 stage interview process and for the right candidate they'll interview this week! If you're interested in this role, or know someone who would be, then please apply to this role and contact a.