Are you a frontend software developer with experience in React or Angular? If yes, this could be your ideal next role! A well-funded, research-led technology start-up is seeking a Mid–Senior Front-End Developer to join its growing team in Cambridge. This is a high-impact role where you’ll take ownership of front-end development, working closely with engineers and researchers to translate complex systems into intuitive, production-ready user experiences. The Role As a Front-End Developer, you will lead the design and development of modern web applications - taking products from early-stage prototypes through to full production deployment. You’ll work in a highly technical, fast-paced environment, collaborating with backend engineers and research teams to build interfaces for sophisticated AI-driven systems. While this role will evolve into leading a small front-end function, it remains hands-on and development-focused. What You’ll Be Doing: * Designing, building, and maintaining modern front-end applications using React or Angular. * Taking ownership of projects from prototype through to production deployment. * Translating complex technical workflows into clean, user-friendly interfaces. * Ensuring performance, scalability, and maintainability of front-end systems. * Contributing to architectural decisions across the wider platform. * Mentoring and supporting other front-end developers as the team grows. * 5+ years’ commercial experience in front-end development. * Strong experience with React or Angular (experience with both is advantageous). * Proven ability to own and deliver front-end projects end-to-end. * Solid understanding of modern front-end architecture, state management, and tooling. * Experience working with APIs and backend-integrated systems. * Ability to read and understand Python-based codebases (particularly research prototypes). * Strong problem-solving skills and ability to work independently. * Excellent communication skills when working across technical disciplines. * Experience working on LLM-powered or AI-driven applications. * Exposure to agentic workflows or complex computational systems. * Background in start-ups or early-stage environments. * Experience building developer tools, dashboards, or technical UIs. Who You Are: * Comfortable operating in a fast-moving, research-heavy environment. * Curious and motivated by technically challenging problems. * Able to bridge the gap between complex backend systems and user experience. * Proactive, adaptable, and ownership-driven. * Interested in working closely with highly technical engineers and researchers. #J-18808-Ljbffr
Senior Frontend Developer
