Front-End JavaScript/TypeScript/React/AG Grid Software Engineer : Trading : £120-180k plus excellent bonus : London

We're partnering with a leading quantitative trading firm that's continuing to invest heavily in its engineering teams. They're looking for a talented Software Engineer to help build the next generation of high-performance trading applications used by traders, quants, and researchers across global markets. This is an opportunity to work on complex, data-intensive applications where performance, usability, and reliability are critical. You'll be building sophisticated web-based platforms that process and visualise large volumes of real-time financial data. Working as part of a highly collaborative engineering team, you'll design and develop modern frontend applications that power trading workflows. You'll work closely with traders, product specialists, and backend engineers to deliver intuitive, high-performance user interfaces. You'll be involved in: * Building complex, interactive data grids and financial dashboards * Developing responsive, performant web applications handling real-time market data * Creating reusable UI components and internal frontend libraries * Optimising rendering performance for large datasets * Collaborating with backend teams to integrate low-latency APIs * Influencing architecture and frontend best practices We're interested in engineers with strong experience building sophisticated web applications rather than simple websites. You'll ideally have experience with: * JavaScript and TypeScript * React * AG Grid (or similar enterprise data grid technologies) * State management (Redux, Zustand or equivalent) * Performance optimisation and rendering large datasets * WebSockets or real-time data streaming * RESTful APIs * HTML5 and modern CSS