> Markdown version of [/jobs/ext/4631132-ui-developer-react-next-js](https://www.wearedevelopers.com/jobs/ext/4631132-ui-developer-react-next-js). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # UI Developer - React/Next.js - **Company:** Synergize Consulting Ltd - **Location:** London, United Kingdom - **Contract:** Temporary contract - **Skills:** HTML, Application Programming Interfaces (APIs), Acceptance Test-Driven Development, Software Quality, Code Reuse, Code Review, Design of User Interfaces, Live Connect (Windows), Next.js, Website Wireframe, ReactJS, Software Coding - **Published:** November 8, 2026 - **Apply:** https://www.careerboard.com/gb/en/find-jobs-in-United-Kingdom/-856D0DE596CD84AB1B/ ## About the Role * Strong commercial UI development experience. * Hands-on React and Next.js expertise. * HTML wireframing and prototyping skills. * Experience using API mocking frameworks. * A commitment to software quality, testing and user needs. * Clearance: BPSS required, with a minimum of three years' UK residency. Previous government digital delivery or accessibility experience would be beneficial. ## Description * Developing responsive interfaces using React and Next.js. * Creating HTML wireframes and prototypes to explore and validate user journeys. * Using API mocking frameworks to support development and testing. * Writing clean, secure, reusable code using a test-driven approach. * Contributing to coding standards, code reviews and continuous improvement. * Supporting live services and investigating production issues. * Sharing knowledge and mentoring colleagues where appropriate to your level.