4 results for React Engineer in London, London, City of

React Engineer

City of London, London
remote
Contract
- GBP / Yearly
Robert Half Technology are assisting a leading consultancy to recruit a Frontend Engineer on a contract basis. Inside IR35. Hybrid working - London based. ASAP start - 3 month contract.Role * The Frontend Engineer will design, develop, and maintain user-facing features across global platform solutions, ensuring performance, scalability, and responsiveness. * Build and implement multi-language UI components and localisation frameworks to support international products and users. * Support currency display, regional UX behaviours, and other localisation-driven interface requirements. * Develop features across live and seller platform surfaces with a strong focus on usability, consistency, and scalability. * Integrate frontend applications with backend services via GraphQL, ensuring efficient and reliable data flow. * Collaborate closely with backend engineers, consultants, and product stakeholders to deliver high-quality end-to-end solutions. * Contribute to the improvement of frontend architecture, design systems, and reusable component libraries. * Troubleshoot and resolve frontend performance, rendering, and integration issues efficiently. * Stay up to date with modern frontend technologies and best practices, applying continuous improvement to development processes.Profile * The Frontend Engineer will have 4+ years' experience in frontend development. * Strong expertise in React and modern JavaScript/TypeScript-based frameworks. * Experience with Next.js and Vite in production environments. * Strong knowledge of GraphQL and API integration patterns. * Experience building user experiences tied to transactions, pricing, or eCommerce workflows is highly desirable. * Ability to work across multiple systems and evolving requirements in a consultancy or client-facing environment. * Strong understanding of performance optimisation, responsive design, and UX best practices. * Excellent problem-solving skills with strong attention to detail. * Strong communication and collaboration abilities, with the ability to work effectively across client teams and stakeholders.Company * Leading consultancy * Hybrid working - London based, 3 days per week on siteSalary & Benefits The salary range/rates of pay is dependent upon your experience, qualifications or training.Robert Half Ltd acts as an employment business for temporary positions and an employment agency for permanent positions. Robert Half is committed to diversity, equity and inclusion. Suitable candidates with equivalent qualifications and more or less experience can apply. Rates of pay and salary ranges are dependent upon your experience, qualifications and training. If you wish to apply, please read our Privacy Notice describing how we may process, disclose and store your personal data: roberthalf.com/gb/en/privacy-notice.<img src="https://counter.adcourier.com/QWxmaWUuUm93ZXR0Ljk0Njc1LjEwOTIzQHJoaS5hcGxpdHJhay5jb20.gif">
2026-04-22T15:37:30Z

React Developer

London, London
remote
Contract
- GBP / Yearly
Robert Half Technology are assisting a market leading financial services organisation to recruit a React Developer on a contract basis. Hybrid working - London basedRole<ul><li>The React developer will be working on the build of a product-grade React & Typescript application from greenfield through to a maintainable, globally scalable, and secure product</li><li>Greenfield build to production: build a production-grade React & TypeScript application from zero to a maintainable, scalable platform</li><li>Data-dense UI delivery: Deliver high-quality UI for dashboards, tables/grids, filtering/sorting, drilldowns, forms, and multi-step workflows</li><li>State & data patterns: implement robust client-state and server-state patterns including loading/error states, retries, resilience, caching and invalidation</li><li>Performance engineering: Drive render efficiency, bundle size control, code splitting, virtualisation for large datasets, network efficiency, and instrumentation/observability</li><li>API contract collaboration: Work with backend engineers on predictable API contracts via BFF (pagination, aggregation shapes, response models, error semantics)</li><li>Security-by-design delivery: Apply secure front-end practices (auth/session hygiene, safe client-side data handling, dependency hygiene)</li><li>Accessibility & usability: Ensure keyboard support, focus management, ARIA where appropriate, and strong empty/error states for complex UIs</li><li>Quality discipline: Maintain a strong quality bar through code review, automated tests, CI quality gates, and release readiness</li><li>Delivery pipelines: Contribute practically to build tooling, CI checks, deployment considerations and environment configuration</li><li>Documentation: Produce concise, proper documentation for key decisions, patterns and non obvious implementation details</li></ul>Profile<ul><li>The React Developer will have significant commercial experience within financial services, building modern React applications (hooks, composition patterns, controlled/uncontrolled components, state lifting, modularisation</li><li>Demonstrated ability to operate as a senior engineer: strong judgement, proactive risk management, pragmatic delivery, and high code quality standards</li><li>Proven ability to design front-end architecture for long-term maintainability (module structure, feature boundaries, shared UI patterns, conventions)</li><li>Comfortable establishing foundations early (linting/formatting, project structure, testing strategy, patterns for API access, error handling, and observability hook)</li><li>Experience shipping complex interface: tables/grids, dashboards, rich filters, multi-step workflows, and interaction-heavy UIs</li><li>Familiarity with performance constraints caused by large datasets and frequent UI interactions (virtualisation, event handling)</li><li>Strong TypeScript capability across: typed component APIs (props/contracts), shared domain models/DTOs, safe typing around API responses, error and async flows, sensible user use of generics/utility types without over-engineering</li><li>Proven judgement selecting and implementing state patterns: clear separation of UI state vs server state, caching & invalidating strategies, avoiding unnecessary re-render and state leaks</li><li>Experience with modern tooling such as TanStack Query</li><li>Strong awareness of security/performance best practices in client data fetching and caching (handling auth/session, sensitive data considerations, preventing accidental data leakage, safe error handling)</li><li>Experience writing and maintaining meaningful automated tests with a strong judgement on what to test, keeping suites fast and avoiding brittleness</li><li>Evidence of improving real-world performance (bundle analysis, render optimisation, code splitting, virtualisation)</li><li>Ability to keep UI responsive under heavy interaction patterns and large datasets.</li><li>Security-conscious delivery</li><li>Security-minded development practices (OWASP awareness, auth/session hygiene, dependency hygiene)</li><li>Comfortable operating in environments where confidentiality, disciplined change control and auditability matter</li><li>Data visualisation (interactive charts; performance-conscious rendering)</li></ul>Company<ul><li>Market leading financial services organisation with offices in London</li><li>Hybrid working - London based </li></ul>Salary & BenefitsThe salary range/rates of pay is dependent upon your experience, qualifications or training.Robert Half Ltd acts as an employment business for temporary positions and an employment agency for permanent positions. Robert Half is committed to diversity, equity and inclusion. Suitable candidates with equivalent qualifications and more or less experience can apply. Rates of pay and salary ranges are dependent upon your experience, qualifications and training. If you wish to apply, please read our Privacy Notice describing how we may process, disclose and store your personal data: roberthalf.com/gb/en/privacy-notice.<img src="https://counter.adcourier.com/S2F6aW0uSGFzc2FuLjEyNjE1LjEwOTIzQHJoaS5hcGxpdHJhay5jb20.gif">
2026-04-02T14:22:40Z

Full Stack Engineer (React, TypeScript, AWS)

St. Albans, Hertfordshire
remote
Permanent
- GBP / Yearly
Full Stack Engineer (React, TypeScript, AWS) - Growing Company! Perm Role OnlyHybrid Working: 2 days in the office and 3 days from homeLocation: North West London / Hertfordshire (near Watford) A growing firm is hiring a Full-Stack Engineer to join a small, high-impact team building modern, scalable web applications. This is a hands-on, greenfield role with full ownership from idea to production, working closely with the business to deliver tools that make a real impact.What you'll do<ul style="direction: ltr; unicode-bidi: embed; margin-top: 0in; margin-bottom: 0in;" type="disc"><li style="margin-top: 0; margin-bottom: 0; vertical-align: middle;">Build full-stack applications using React, TypeScript, and AWS</li><li style="margin-top: 0; margin-bottom: 0; vertical-align: middle;">Own projects end-to-end</li><li style="margin-top: 0; margin-bottom: 0; vertical-align: middle;">Work directly with stakeholders to deliver solutions</li><li style="margin-top: 0; margin-bottom: 0; vertical-align: middle;">Develop intuitive frontends and scalable backend services</li></ul>What you'll need<ul type="disc" style="direction: ltr; unicode-bidi: embed; margin-top: 0in; margin-bottom: 0in;"><li style="margin-top: 0; margin-bottom: 0; vertical-align: middle;">3+ years' experience building web applications</li><li style="margin-top: 0; margin-bottom: 0; vertical-align: middle;">Strong React and TypeScript (full-stack)</li><li style="margin-top: 0; margin-bottom: 0; vertical-align: middle;">Experience with Node.js and SQL/PostgreSQL</li><li style="margin-top: 0; margin-bottom: 0; vertical-align: middle;">Exposure to AWS, Docker, and CI/CD</li><li style="margin-top: 0; margin-bottom: 0; vertical-align: middle;">Comfortable working autonomously</li></ul>Why join<ul style="direction: ltr; unicode-bidi: embed; margin-top: 0in; margin-bottom: 0in;" type="disc"><li style="margin-top: 0; margin-bottom: 0; vertical-align: middle;">Greenfield development</li><li style="margin-top: 0; margin-bottom: 0; vertical-align: middle;">Small team with real ownership</li><li style="margin-top: 0; margin-bottom: 0; vertical-align: middle;">Modern tech stack</li><li style="margin-top: 0; margin-bottom: 0; vertical-align: middle;">Strong transport links, parking, and Thameslink access into Central London</li></ul> 2 stage process and fast turnaroundExcellent Benefits (25 days holidays, Healthcare, Pension, Training allowance and including a bonus) Robert Half Limited is in partnership with this client.Important Note:This is a UK based role, Applicants must have full rights to work in the UK. We are unable to consider fully remote, B2B or B2C contractors. APPLY NOW!!!Robert Half Ltd acts as an employment business for temporary positions and an employment agency for permanent positions. Robert Half is committed to diversity, equity and inclusion. Suitable candidates with equivalent qualifications and more or less experience can apply. Rates of pay and salary ranges are dependent upon your experience, qualifications and training. If you wish to apply, please read our Privacy Notice describing how we may process, disclose and store your personal data: roberthalf.com/gb/en/privacy-notice.<img src="https://counter.adcourier.com/dG9ueS5rb3lyYXR0eS42MTEzNy4xMDkyM0ByaGkuYXBsaXRyYWsuY29t.gif">
2026-05-01T05:55:40Z

React Developer

London, London
remote
Contract
- GBP / Yearly
Robert Half Technology are assisting a global market leading e-commerce organisation to recruit a React Developer on a 6 months contract basis. Hybrid working - London basedAs a React Developer, you will build features that enable the platform to operate globally, supporting localisation, performance, and seamless integration with backend systems.Role<ul><li>The React Developer will be responsible for implementing multi-language UI and localisation frameworks</li><li>Supporting currency display and regional UX behaviour</li><li>Building features across Live and seller platform surfaces</li><li>Integrating with backend services via GraphQL</li><li>Contributing to consistency across web and mobile experiences</li><li>Build and own frontend features end-to-end</li><li>Ensure performance, usability, and responsiveness</li><li>Collaborate closely with backend and product teams</li><li>Contribute to improvements in frontend systems and patterns</li></ul>Profile<ul><li>Strong experience with React and modern web frameworks</li><li>Familiarity with Next.js, Vite, and GraphQL</li><li>Experience building user experiences tied to transactions, pricing, or eCommerce flows is strongly preferred</li><li>The React Developer will be able to work across multiple systems and evolving requirements Code-Writing Contribution Develops production-ready UI features with increasing complexity and ownership.</li></ul>Company<ul><li>Global market leading e-commerce organisation with offices in London</li><li>Hybrid working - London based </li></ul>Salary & BenefitsThe salary range/rates of pay is dependent upon your experience, qualifications or training.Robert Half Ltd acts as an employment business for temporary positions and an employment agency for permanent positions. Robert Half is committed to diversity, equity and inclusion. Suitable candidates with equivalent qualifications and more or less experience can apply. Rates of pay and salary ranges are dependent upon your experience, qualifications and training. If you wish to apply, please read our Privacy Notice describing how we may process, disclose and store your personal data: roberthalf.com/gb/en/privacy-notice.<img src="https://counter.adcourier.com/S2F6aW0uSGFzc2FuLjg4NzUzLjEwOTIzQHJoaS5hcGxpdHJhay5jb20.gif">
2026-04-22T10:14:04Z