React Engineer
Randstad Digital
Job Description
Lead React Engineer Location: Sheffield, UK (Hybrid – 2-3 days per week in the office) Day Rate : £400 per day Umbrella Contract Length: 6-Month Contract Are you a senior or lead-level frontend expert who loves building slick, scalable, and highly accessible user interfaces? We are looking for a Lead React Engineer to join our team in Sheffield for an exciting 6-month project. If you thrive on solving complex architecture puzzles, mentoring junior devs by example, and writing pristine TypeScript, we want to hear from you.
What You’ll Be Doing Architect & Build: Drive the development of high-performance production web applications using React and modern frontend tooling. Optimize & Debug: Dive into existing codebases to hunt down bugs, implement functional enhancements, fix layout issues, and level up overall code quality. System Design: Own frontend architecture decisions—from state management and component design to smart data fetching, caching, and performance tuning.
Champion Accessibility: Ensure our digital products are inclusive, delivering seamless experiences aligned with WCAG practices. Maintain Quality: Lead by example with robust testing approaches (Unit, Integration, E2E) and strict code quality standards. What We’re Looking For React Mastery: Deep, production-proven experience with React and the modern frontend ecosystem.
JS/TS Expert: Advanced knowledge of JavaScript (ES6+) and strong day-to-day proficiency in TypeScript. UI Fundamentals: Solid grasp of HTML5, CSS3, responsive layouts, modern CSS patterns, and native browser APIs. Testing Advocate: Hands-on experience with unit, integration, and end-to-end testing frameworks.
The Technical Bar: As part of our hiring process, candidates will need to complete a Karat technical assessment. The Setup This is a hybrid role based in our Sheffield office. You’ll need to be in the office 2-3 days a week to collaborate with the team face-to-face, with the remaining days working remotely. #ReactJS #TypeScript #WebDevelopment #SheffieldJobs #TechContracts #FrontendEngineer