Senior Frontend Developer - JavaScript - React - London - Miller Maxwell is assisting an International proprietary trading organisation seeking to expand their UI team. This senior position will see the successful Senior UI Developer working directly with front-office users to build customised UIs in a fast-paced, live trading environment. The team in place is a mix of Full Stack Engineers, Testers and Backend Software Engineers. This hire will be free to lead projects and take ownership of some exciting green-field development projects starting in 2025. This team approaches tech and mathematical problems with a unique perspective, consistently pushing the boundaries of innovation. Key Responsibilities for the Senior Frontend Developer: Collaborate with an experienced front-office team to enhance their quantitative trading platform, focusing on front-end development. Build user interfaces for front-office users. Implement, modify, and configure platform improvements. Work closely with Java and C++ Software Engineers to design new platform features. Requirements for the Senior Frontend Developer: A degree in a STEM-related subject. At least six years commercial frontend development experience. Proven experience with TypeScript and React. Proficiency in Redux, HTML, and CSS. Experience in a FinTech or Financial Services environment. Experience designing and developing electronic trading solutions – desirable. Demonstrable experience in building large-scale, data-driven platforms. What the client can offer the Senior Frontend Developer: An opportunity to join a team where you will be part of something extraordinary. With unparalleled opportunities for career progression and unmatched investment in employee development, this role offers: Competitive bonus Pension scheme Life insurance Private medical insurance Travel benefits 26 days holiday Gym membership and wellness benefits. If you are ready to take your career to the next level and work with a highly talented team, apply now