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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior React.js Engineer - London - **Company:** Strike IT Services - **Location:** London, UK - **Experience:** Expert - **Contract:** Contract - **Skills:** JavaScript (Programming Language), HTML5, Automation of Tests, Microsoft Azure, Cascading Style Sheets (CSS), Cloud Computing, Code Review, Continuous Integration, DevOps, Document Object Model, Design of User Interfaces, Performance Tuning, Next.js, Web Application Security, Systems Integration, Web Content Accessibility Guidelines, Network Routers, ReactJS, Rollup, Delivery Pipeline, Backend, Webpack, Material UI, Front End Software Development, React Redux, React Testing Library, Api Design, Software Coding, Restful APIs, Es2015 - **Published:** June 30, 2026 - **Apply:** https://computerjobs.com/gb/en/mob/job/4AA244C0973F72870F ## About the Role 4-5+ years' commercial experience in Frontend Development Strong hands-on development experience with React.js Excellent coding skills using JavaScript (ES6+), HTML5 and CSS3 Strong understanding of responsive UI/UX design principles Hands-on experience with: * Material-UI (MUI) * Styled Components * Webpack * Rollup * Storybook * React Router DOM (including complex parent-child routing) * DOM manipulation techniques Expertise in state management frameworks including: * Redux * Zustand * Context API * Custom Hooks Strong understanding of: * Component architecture * Reusability patterns * Performance optimisation * Frontend design principles Hands-on experience with automated testing using: * Jest * React Testing Library Backend & APIs Experience integrating and consuming RESTful APIs Cloud, DevOps & Deployment Experience deploying Front End applications within Microsoft Azure Cloud Experience with Azure DevOps Knowledge of CI/CD pipelines and automated build/deployment processes Micro Frontends Experience or strong understanding of: * Module Federation * Micro Front End architecture * Large-scale distributed Front End applications Non-Functional Requirements (NFRs) Strong understanding and practical experience of: * Web application security * Performance optimisation * Accessibility (WCAG) * Scalability * Resilience Desirable Experience Experience with Next.js for Server Side rendering and SEO optimisation Experience using DevExtreme DataGrid and DevExtreme BI Dashboards Experience with ExcelJS for advanced export and reporting capabilities Experience integrating with enterprise component libraries/design systems ## Description We are seeking an experienced Senior React.js Engineer to join a major digital transformation programme within a leading global consultancy. You will play a key role in designing and developing modern, scalable web applications within a complex enterprise environment. This is an excellent opportunity to work on large-scale, business-critical platforms, leveraging modern Front End technologies, micro-Front End architecture, cloud-native deployment models, and best-in-class engineering practices. INSIDE IR35 HYBRID WORKING Key Responsibilities * Design, develop and maintain high-quality, scalable web applications using React.js. * Build reusable, maintainable and performant UI components aligned to enterprise standards. * Work closely with architects, designers, product teams and Back End engineers to deliver robust end-to-end solutions. * Integrate and consume RESTful APIs and collaborate with Back End teams on API design and optimisation. * Implement and maintain micro Front End architectures using modern tooling and module federation principles. * Ensure solutions meet key Non-Functional Requirements (NFRs), including security, accessibility, performance and scalability. * Contribute to CI/CD pipelines, automated testing and deployment processes. * Participate in code reviews, technical design sessions and architectural discussions. * Drive best practices around component architecture, state management, testing and Front End performance optimisation. Essential Skills & Experience Frontend Development 4-5+ years' commercial experience in Frontend Development Strong hands-on development experience with React.js Excellent coding skills using JavaScript (ES6+), HTML5 and CSS3 Strong understanding of responsive UI/UX design principles Hands-on experience with: * Material-UI (MUI) * Styled Components * Webpack * Rollup * Storybook * React Router DOM (including complex parent-child routing) * DOM manipulation techniques Expertise in state management frameworks including: * Redux * Zustand * Context API * Custom Hooks Strong understanding of: * Component architecture * Reusability patterns * Performance optimisation * Frontend design principles Hands-on experience with automated testing using: * Jest * React Testing Library Backend & APIs Experience integrating and consuming RESTful APIs Cloud, DevOps & Deployment Experience deploying Front End applications within Microsoft Azure Cloud Experience with Azure DevOps Knowledge of CI/CD pipelines and automated build/deployment processes Micro Frontends Experience or strong understanding of: * Module Federation * Micro Front End architecture * Large-scale distributed Front End applications Non-Functional Requirements (NFRs) Strong understanding and practical experience of: * Web application security * Performance optimisation * Accessibility (WCAG) * Scalability * Resilience Desirable Experience Experience with Next.js for Server Side rendering and SEO optimisation Experience using DevExtreme DataGrid and DevExtreme BI Dashboards Experience with ExcelJS for advanced export and reporting capabilities Experience integrating with enterprise component libraries/design systems ## Related Videos - [To New Frontiers: The Future of Frontend Development](https://www.wearedevelopers.com/videos/404-to-new-frontiers-the-future-of-frontend-development) - [From DevOps to Scaled DevOps: How We’re Rebuilding Continuous Delivery as a Platform](https://www.wearedevelopers.com/videos/100018-from-devops-to-scaled-devops-how-we-re-rebuilding-continuous-delivery-as-a-platform) - [The Resilience of the World Wide Web](https://www.wearedevelopers.com/videos/1281-the-resilience-of-the-world-wide-web) - [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) - [DevOps Maturity Check – a way to balance autonomy and alignment](https://www.wearedevelopers.com/videos/58-devops-maturity-check-a-way-to-balance-autonomy-and-alignment) - [Can SVG be fast? 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