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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior React Engineer - **Company:** Grid Dynamics - **Location:** Greater London, UK - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Tibco Ems, Java (Programming Language), Cloud Engineering, Software Quality, Data as a Services, Memory Management, Protocol Buffers, Enterprise Messaging Systems, Performance Tuning, Selenium, Software Construction, TypeScript, Virtualization Technology, WebSocket, Real Time Systems, ReactJS, Cypress (Programming Language), Software Application Programming, Backend, AngularJS, Playwright, Real Time Data, Apache Kafka, Front End Software Development - **Published:** September 10, 2026 - **Apply:** https://www.collegerecruiter.com/job/2840588494-senior-react-engineer ## About the Role Essential Skills & Experience * Strong commercial experience developing applications using React and TypeScript. * Experience delivering production-grade frontend systems in trading, market data, financial services or other high-throughput environments. * Deep understanding of browser internals, rendering performance, virtualisation, memory management and frontend optimisation techniques. * Experience consuming and managing real-time data feeds using WebSockets, pub/sub messaging or similar technologies. * Understanding of concepts such as backpressure, reconnection handling, snapshots and state recovery. * Strong understanding of software engineering best practices, testing and code quality. * Experience with Playwright, Cypress, Selenium or similar testing frameworks. * Ability to understand and troubleshoot backend services, particularly Java-based systems. Nice to have * Experience migrating Angular or AngularJS applications to React. * Knowledge of low-latency messaging platforms such as Solace, Tibco EMS, Kafka or Aeron. * Familiarity with binary protocols and wire formats including SBE, FlatBuffers or Protobuf. * Experience with AG Grid or similar enterprise-grade data grid frameworks. * Exposure to containerised deployment environments and cloud-native architectures. * Experience building applications for electronic trading, order management, market making, RFQ/RFS workflows or single dealer platforms., * Foreign Exchange (FX) * Spot and Forward Trading * FX Options * Pricing and Market Making * Transaction Cost Analysis (TCA) * Market Data Platforms ## Description We are seeking a highly skilled Senior React Engineer to join a front-office technology team responsible for building next-generation electronic trading and market data applications. This is an opportunity to work on highly performant, real-time systems used by traders and sales teams globally. You'll be responsible for building responsive, data-intensive user interfaces that process and visualise large volumes of streaming market data while maintaining exceptional user experience and performance., As a Senior React Engineer, you will work closely with frontend, backend and business stakeholders to deliver mission-critical trading applications. You'll play a key role in designing frontend architecture, optimising performance, and ensuring applications remain responsive under heavy data loads. * Design and develop high-performance web applications using React and TypeScript. * Build and maintain real-time user interfaces consuming large volumes of streaming market data. * Optimise browser performance, rendering pipelines, memory usage and application responsiveness. * Work closely with backend engineering teams to integrate low-latency data services. * Contribute to frontend architecture, technical standards and engineering best practices. * Develop robust testing strategies and maintain high levels of application quality. * Participate in system design discussions and performance tuning initiatives. * Support the evolution of trading and market data platforms used globally. ## Related Videos - [Watch Tests Go Brrrr! : Getting Started with Cypress in ReactJS](https://www.wearedevelopers.com/videos/282-watch-tests-go-brrrr-getting-started-with-cypress-in-reactjs) - [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock) - [Proactive monitoring and smoke testing in your production environment](https://www.wearedevelopers.com/videos/139-proactive-monitoring-and-smoke-testing-in-your-production-environment) - [Rethinking Reactive Architectures with GraphQL ](https://www.wearedevelopers.com/videos/121-rethinking-reactive-architectures-with-graphql) - [Meet Your New BFF: Backend to Frontend without the Duct Tape](https://www.wearedevelopers.com/videos/682-meet-your-new-bff-backend-to-frontend-without-the-duct-tape) - [React and the power of visualisation](https://www.wearedevelopers.com/videos/100-react-and-the-power-of-visualisation) ## Related Articles - [React Developer Salary [2023]](https://www.wearedevelopers.com/magazine/198-react-developer-salary-2023) - [16 Best Free React UI Libraries in 2025](https://www.wearedevelopers.com/magazine/148-16-best-free-react-ui-libraries-in-2025) - [The Best 7 Frontend Frameworks for Developers in 2025](https://www.wearedevelopers.com/magazine/400-the-best-7-frontend-frameworks-for-developers-in-2025) - [Frontend Developer Salary in The UK](https://www.wearedevelopers.com/magazine/233-frontend-developer-salary-in-the-uk) - [The Best JavaScript Framework to Learn](https://www.wearedevelopers.com/magazine/229-the-best-javascript-framework-to-learn) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated)