Top Front End Developer Jobs in London

Build and lead frontend experiences for Perk Events, a group travel and events platform. Shape product direction, write architectural designs, manage technical debt, collaborate across squads, mentor engineers, and raise engineering quality. The role involves influencing product strategy, driving technical alignment, and delivering scalable experiences for event planners, suppliers, support teams, and participants.

Build and maintain customer-facing single-page web applications using React. Deliver end-to-end features, fix defects, write tests, participate in code reviews, produce documentation, and collaborate with cross-functional teams while considering accessibility, security, observability, and performance.

The Senior Front End Software Engineer will architect and develop user interfaces for data-intensive applications, mentor peers, and engage directly with users to improve product features.

Lead frontend engineer responsible for designing and delivering cloud-native, mobile-first solutions. Collaborate with cross-functional teams, write clean/testable code, troubleshoot, mentor junior developers, adopt AI-assisted development practices, and drive continuous improvement of development processes and automation.

Designs, develops, tests, and maintains scalable, secure front-end applications using React and TypeScript. Uses AI-assisted development tools responsibly, produces architecture artifacts, improves code quality, debugs complex issues, and creates visualizations from large datasets to drive system improvements.

Lead design and implementation of large-scale graph UI features, collaborate with design, backend, and stakeholders, optimize Keylines visuals, mentor junior engineers, ensure integration with backend services, and drive projects through the SDLC for a next-gen cybersecurity UI.

Develop and maintain React web applications for trade execution, portfolio management, and risk analysis. Build features with strong test coverage, collaborate across the technology stack, conduct code reviews, improve UI and UX, and contribute to architecture decisions. Work with real-time data, WebSockets, monorepo tooling, state management, monitoring, and AI-assisted development workflows. The role also involves REST and OpenAPI integration, automated testing, and performance improvements for data-intensive interfaces.

Develop and maintain front-end functionality for UKTV’s connected TV and video-on-demand platforms. Build features, fix bugs, implement accessibility, integrate third-party services, collaborate with platform partners, conduct code reviews, and contribute to agile planning and delivery. Serve as an in-house connected TV expert while maintaining code quality, supporting knowledge sharing, and responsibly using AI in development.

Build scalable, maintainable, and well-tested React applications that visualize AI and machine learning insights. Collaborate with data scientists, data engineers, and designers to deliver client-facing products. Lead frontend feature planning, deployment infrastructure, technical standards, reusable component libraries, mentoring, training, and onboarding while serving as the frontend engineering authority for the team.

Own the development of user-facing frontend experiences for real-time AI agent workflows. Drive frontend architecture and technical direction, improve code quality, performance, testing, and maintainability, and collaborate with users, Product, Design, and Engineering. Help simplify complex enterprise workflows while shaping interaction patterns for AI-powered software. The role also involves influencing technical decisions in an early-stage, high-ownership environment.

Lead frontend engineering for the Flexibility team, establishing technical direction and building customer-facing journeys for low-carbon energy technologies. Develop internal interfaces, prototypes, reusable components, and WebViews for mobile experiences. Collaborate with product, design, and stakeholders; contribute to the Coral design system; own development from requirements through deployment and monitoring; and deliver accessible, scalable, high-performance websites.

Build and evolve responsive React frontend applications for customers, partners, and internal users. Design and implement accessible, reliable interfaces and interactive workflows using TypeScript and modern frontend architecture. Contribute to agile product development, testing, CI, performance, maintainability, cross-browser compatibility, and internationalization while collaborating within a cross-functional team.

Build and maintain performant, secure frontend features for repository management using Vue.js and GraphQL. Collaborate across product, design, and backend teams, improve reliability and observability, write tests, participate in on-call and incident response, and apply AI tools responsibly to accelerate development while ensuring quality and safety.

Own Omnea’s front-end architecture and design system across product teams. Build reusable components, establish interface standards, improve performance and build tooling, and guide adoption. Partner closely with designers and engineers to deliver accessible, polished procurement interfaces. Contribute production TypeScript and React code, participate in customer-focused development, mentor teammates, and make autonomous architectural decisions in a fast-growing organization.

Own the delivery of high-quality frontend software in an autonomous Agile team. Design scalable features using TypeScript, React, Node.js, and related technologies; promote TDD, test automation, clean code, performance, and usability. Collaborate with product and design partners, contribute to planning and prioritization, estimate work, conduct code reviews, mentor engineers, share knowledge, and advocate for continuous technical improvement and responsible use of AI.

Own complex frontend features across web and mobile, design React and React Native systems, improve rendering and runtime performance, and maintain shared libraries and abstractions. Collaborate with product, backend engineering, and QA to deliver simple user experiences. Ensure quality through code review, unit, end-to-end, and visual-regression testing while mentoring colleagues and strengthening frontend engineering practices.

Shape frontend architecture and engineering direction across React and React Native product teams. Own shared libraries, platform capabilities, design-system foundations, developer tooling, performance, testing, state and data-flow strategy, and migration decisions. Diagnose systemic web and mobile issues, remain hands-on with implementation and investigations, partner across product, backend, and QA, and mentor senior engineers. Improve developer effectiveness, reliability, and product quality through durable technical mechanisms.

Design and implement browser-based trading tools with polished, sophisticated UIs. Build reusable UI libraries and abstractions, collaborate across the stack, and work closely with traders to capture user needs. Emphasizes typed functional programming and high UX standards.

Build and maintain scalable, high-performance React/TypeScript UIs, implement AI-driven features, develop advanced data visualizations, collaborate on API design, and maintain the internal design system while optimizing performance and real-time data handling.

Design, build, and operate reliable, scalable platform infrastructure. Manage cloud resources, IaC (Terraform, Helm, Go CRDs), Kubernetes and serverless deployments, monitoring/alerting (Datadog), CI/CD pipelines, incident response, SLIs/SLOs, and collaborate with product and platform teams to reduce toil and improve developer workflows.

Develop and maintain user-friendly, robust front-end applications in an agile environment. Responsibilities include UI development, cross-browser compatibility, secure web development, JavaScript framework development, jQuery, WebSocket-based applications, React Native mobile development, automated testing, and Git-based source control.

The Front-End Engineer will build UIs for the institutional team, develop data visualizations, and collaborate with traders to create optimized tools, focusing on reliability and performance.

Own and evolve the frontend web platform, design and run growth experiments to improve retention, engagement, and conversions, collaborate with product and marketing, and mentor teammates to define frontend best practices.

The Frontend Engineer will build user-friendly interfaces for complex financial workflows, develop responsive applications, and lead projects using AI technologies while collaborating with a small team.

The Senior Software Engineer will develop complex UIs for multi-modal data visualization, optimizing performance for 3D/4D scenes and collaborating across the stack and team.