Senior React Frontend Developer, Data

Open Cosmos

Senior React Frontend Developer responsible for building scalable UI components for DataCosmos. Transforming satellite data into actionable insights at Open Cosmos with a collaborative approach.

Posted 6/14/2026full-timeHarwell • 🇬🇧 United KingdomSeniorWebsite

Tech Stack

Tools & technologies

CloudD3.jsJavaScriptReactReduxTypeScript

About the role

Key responsibilities & impact

Lead the design and development of the interfaces that bring the DataCosmos platform to life
Build performant, scalable UI components and data visualisations
Design, develop, and maintain React-based user interfaces for data exploration, visualisation, and delivery
Implement reusable, scalable front-end architecture and component libraries
Translate data requirements into clear, accessible, and user-friendly interfaces
Work closely with data and backend engineers to integrate APIs and data services effectively
Optimise front-end performance when handling high-volume or real-time data
Write and maintain unit and integration tests to ensure reliability and robustness
Participate in code reviews, ensuring adherence to front-end best practices and coding standards
Contribute to CI/CD pipelines for front-end deployment and release
Provide technical guidance on React architecture, state management, and data handling patterns
Act as a subject matter expert for front-end development within data-driven applications
Identify opportunities to simplify, optimise, and enhance data visualisation and UI performance
Ensure front-end solutions support clarity, usability, and efficiency for both technical and non-technical users

Requirements

What you’ll need

Strong proficiency in React and TypeScript
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.

Benefits

Comp & perks

Equal opportunity employer
A mission-driven company making space accessible to help solve real-world challenges
A diverse, ambitious, and supportive team

ATS Keywords

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Hard Skills & Tools

ReactTypeScriptHTMLCSSReduxZustandContextD3.jsRechartsGit

Soft Skills

communicationownershipcollaborationproblem-solvingtechnical guidanceuser experience focusadaptabilityattention to detailcode qualityusability