Robert Half Technology are assisting a market leading financial services organisation to recruit a React Developer on a contract basis. Hybrid working - London based.

* The React Developer will be responsible for designing, building, and maintaining high-quality front-end applications using React and TypeScript within a secure, data-driven environment. * Work closely with backend engineers, UX designers, and technical stakeholders to deliver robust, scalable web applications aligned to business and regulatory requirements. * Develop and maintain complex, data-heavy interfaces including dashboards, reporting views, grids, filters, and workflow-driven user journeys. * Implement efficient state management patterns, handling both client and server state, including caching, error handling, and data synchronisation strategies. * Ensure front-end performance is optimised through techniques such as code splitting, virtualisation, bundle optimisation, and rendering efficiency improvements. * Collaborate on API design through a Backend-for-Frontend (BFF) approach, ensuring clean, predictable data contracts. * Embed security-by-design principles into all front-end development, including secure data handling and authentication considerations. * Maintain high standards of accessibility, usability, and cross-browser compatibility. * Contribute to CI/CD pipelines, testing strategies, and overall engineering best practices. * Provide clear technical documentation and contribute to front-end architectural decisions.

* The React Developer will have strong commercial experience building modern React and TypeScript applications in financial services or similarly regulated environments. * Proven experience delivering complex, enterprise-grade front-end applications from build through to production. * Strong understanding of front-end architecture, including scalable project structure, reusable component design, and maintainable code patterns. * Advanced TypeScript skills, including typing API responses, shared models, and robust component interfaces. * Experience working with modern state management and data-fetching patterns (e.g. React Query / TanStack Query or equivalent). * Demonstrable experience building data-intensive UIs such as dashboards, analytics views, and high-interaction workflows. * Strong awareness of front-end performance optimisation techniques and debugging performance issues in production systems. * Experience implementing automated testing strategies with a pragmatic approach to test coverage and quality. * Solid understanding of secure front-end development practices, including authentication flows, session handling, and dependency management. * Exposure to modern front-end tooling and practices, including CI/CD pipelines and cloud-based deployment environments. * Strong communication skills with the ability to work effectively in cross-functional delivery teams.

* Market leading financial services business with a strong focus on technology-driven delivery * Contract-based role within a fast-paced, delivery-focused engineering environment * Hybrid working with a London base * Collaborative environment working on greenfield and enterprise-scale platforms

The salary range/rates of pay is dependent upon your experience, qualifications or training.

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