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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior React Fronted Developer (Data) - **Company:** Open Cosmos Ltd. - **Location:** Harwell Oxford, UK - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** HTML, Application Programming Interfaces (APIs), Data Analysis, Component-Based Software Engineering, Big Data, Cascading Style Sheets (CSS), Cloud Computing, Software Quality, Code Review, Continuous Integration, D3.Js, Data as a Services, Data Visualization, Database Applications, Data Streaming, TypeScript, Web Performance Optimization, Data Processing, ReactJS, Backend, Git, Material UI, Integration Tests, Data Analytics, Real Time Data, Front End Software Development, React Redux, Api Design, Software Version Control - **Published:** May 23, 2026 - **Apply:** https://uk.indeed.com/viewjob?jk=3727ebe396a5508d ## About the Role Do you have experience in TypeScript?, * Strong proficiency in React and TypeScript, with the ability to design scalable and maintainable front-end systems * Deep understanding of modern front-end development practices, including HTML, CSS, and component-based architecture * Strong capability in building data-driven interfaces and working with APIs and asynchronous data flows * Confident use of state management approaches like Redux, Zustand, Context, or similar * Familiarity with data visualisation libraries (e.g. D3.js, Recharts, or similar) * Strong understanding of front-end performance optimisation, particularly for large or complex datasets * Understanding of CI/CD concepts and cloud-native environments * Ability to structure, transform, and present complex data effectively in the front end * Strong understanding of version control systems (Git) and collaborative development practices * Clear and effective communication, with the ability to work across technical and non-technical teams * Ability to take ownership of front-end architecture, overall user experience and setting high standards for code quality, usability, and performance. * Proactivity in identifying and driving improvements across systems and workflows and providing guidance and support to other engineers, contributing to team capability * A collaborative and solution-oriented approach, working effectively across disciplines, operating in a fast-paced, scaling environment with evolving priorities ## Description As a Senior React Fronted Developer in the Data Team you will lead the design and development of the interfaces that bring the DataCosmos platform to life - building performant, scalable UI components and data visualisations that make complex satellite data clear, accessible, and actionable for users across the platform. You'll be: * Designing, developing, and maintaining React-based user interfaces for data exploration, visualisation, and delivery * Building intuitive and performant UI components to handle large and complex datasets * Implementing reusable, scalable front-end architecture and component libraries * Translating data requirements into clear, accessible, and user-friendly interfaces * Working closely with data and backend engineers to integrate APIs and data services effectively * Optimising front-end performance when handling high-volume or real-time data * Writing and maintain unit and integration tests to ensure reliability and robustness * Participating in code reviews, ensuring adherence to front-end best practices and coding standards * Contributing to CI/CD pipelines for front-end deployment and release * Providing technical guidance on React architecture, state management, and data handling patterns * Acting as a subject matter expert for front-end development within data-driven applications * Identifying opportunities to simplify, optimise, and enhance data visualisation and UI performance * Ensuring front-end solutions support clarity, usability, and efficiency for both technical and non-technical users ## Related Videos - [Web-based Information Visualization](https://www.wearedevelopers.com/videos/84-web-based-information-visualization) - [The Resilience of the World Wide Web](https://www.wearedevelopers.com/videos/1281-the-resilience-of-the-world-wide-web) - [How a Small Team Shrank a Microsoft Monorepo by 94%](https://www.wearedevelopers.com/videos/1236-how-a-small-team-shrank-a-microsoft-monorepo-by-94) - [The Pragmatic Architect: Balancing Necessity vs. Sufficiency in React Systems](https://www.wearedevelopers.com/videos/2101-the-pragmatic-architect-balancing-necessity-vs-sufficiency-in-react-systems) - [NoLoJS - Avoiding JavaScript Cruft with HTML and CSS - Aaron T. 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