Senior Front End React Engineer : Quant Fund : London Hybrid

We're partnering with one of the world's most successful quantitative investment firms to hire an exceptional Senior Front End React Engineer. This is an opportunity to build sophisticated trading and analytics platforms that are used by some of the brightest minds in quantitative finance. This isn't a role where you'll be building marketing websites or standard business applications. You'll work directly alongside quantitative researchers, traders, and engineering teams to create ultra-high-performance, data-rich applications that enable real-time decision making in global financial markets. If you're passionate about crafting elegant user experiences for highly complex systems, enjoy solving technically demanding problems, and want to work in an environment where engineering excellence is genuinely valued, we'd love to hear from you. Job spec Designing and building modern React applications used by traders and quantitative researchers.Creating intuitive visualisations for complex financial and market data.Developing high-performance front-end architectures capable of handling large volumes of real-time streaming data.Collaborating closely with backend engineers, platform teams, quants and portfolio managers.Driving best practices across architecture, testing, performance optimisation and code quality.Influencing product direction by working directly with end users in a highly collaborative environment.Helping shape the future of next-generation trading and research platforms. Requirements Strong commercial experience developing applications with React and TypeScript.Deep understanding of modern JavaScript, HTML5 and CSS.Experience with complex state management and scalable front-end architecture.Strong appreciation for performance optimisation and responsive user interfaces.Experience consuming real-time APIs (WebSockets, GraphQL and/or REST).Excellent problem-solving ability with a genuine passion for software engineering.Comfortable working within highly collaborative engineering teams.Bachelors or Masters degree in Computer Science or STEM subject Bonus Points Experience with financial markets, trading systems or market data.Knowledge of data visualisation libraries such as D3, Highcharts or AG Grid.Experience working with cloud technologies or containerised environments.Familiarity with CI/CD, automated testing and DevOps practices.Exposure to Python or other backend technologies.