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Senior Software Development Engineer (React)

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Summary

A 6-month contract (inside IR35) role in Sheffield (hybrid) for a senior engineer to build and modernise a large-scale React + TypeScript web platform serving the construction industry — new features, performance and scalability work, refactoring, and framework/dependency upgrades.

Senior Software Development Engineer (React)

Location: Sheffield (Hybrid)

Duration: 6 Months

IR35: Inside IR35

The Opportunity

We are currently seeking a Senior Software Development Engineer to join a collaborative and innovative engineering team responsible for delivering modern web applications used across the construction industry.

This is a fantastic opportunity to work on a large-scale React platform, contributing to new feature development, technical enhancements, performance improvements, codebase modernisation, and framework upgrades. You'll play a key role in delivering high-quality software while helping shape the future direction of the product.

The successful candidate will be a hands-on engineer with strong React expertise, a passion for clean code, and experience working within complex enterprise environments.

What You'll Be Doing

  • Developing and maintaining high-quality web applications using React and TypeScript
  • Delivering new features and functionality across an established product suite
  • Improving performance, scalability and user experience
  • Refactoring existing code and supporting application modernisation initiatives
  • Contributing to framework, library and dependency upgrades
  • Building reusable, maintainable and well-tested components
  • Integrating frontend applications with backend APIs and services
  • Investigating and resolving complex technical issues
  • Participating in code reviews and promoting engineering best practices
  • Collaborating closely with Product, Design, QA and Engineering teams
  • Supporting continuous improvement across development processes and tooling

Skills & Experience Required

  • Strong commercial experience building web applications with React and TypeScript

Skills

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