Top Front End Developer Jobs in London

Hands-on engineering leader owning the frontend team for a low-latency trading platform. Build and review TypeScript and Rust code, set architecture and standards, deliver real-time trading interfaces, ensure operational readiness and incident ownership, and mentor and grow engineers while shaping product roadmap with senior stakeholders.

Develop mobile-first, responsive Vue.js frontends focused on performance and UX. Build frontend management systems, participate in code reviews and team ceremonies, mentor junior engineers, and collaborate with backend teams.

Develop server-side applications using Kotlin and Java, collaborate with teams to enhance Atlassian plugins, and ensure code quality through testing and reviews.

Own and evolve the marketing website platform: design Sanity content schemas, build Astro components and design-token-driven UI, ensure accessibility (WCAG 2.2 AA), SEO, localization and performance, extend tooling for AI-assisted composition, and ship end-to-end features from schema to production.

Lead end-to-end implementation of high-fidelity, performant, and accessible frontend features for a realtime collaborative visual canvas. Translate designs into polished interactions, optimize performance and accessibility, collaborate with PMs, designers, and backend engineers, and shape frontend best practices and design systems.

Own and shape the customer-facing web app and marketing landing page using React/Next.js. Define frontend architecture, standards, accessibility, performance, and developer tooling. Build complex, data-rich UIs with designers and full-stack engineers, improve CI/CD and developer experience, and introduce AI-assisted frontend workflows.

As a Senior Frontend Engineer at Fresha, you will design and develop applications, ensuring performance and quality, while collaborating with cross-functional teams. Familiarity with modern JavaScript tools, React/Redux, and an autonomous work style are essential.

Lead front-end technical vision and architecture for a tribe, drive cross-team initiatives, write and review complex React SPAs, improve stability/performance/scalability, mentor engineers, and champion engineering standards while collaborating with Product, Design, Data and QA.

The Staff/Lead Fullstack Engineer will enhance the Mimica Webapp by architecting scalable UI components, managing large datasets, and optimizing performance while collaborating with cross-functional teams.

Develop and maintain frontend software for a video management platform using TypeScript and modern frameworks. Implement state management and API integrations (REST, websockets), write tested maintainable code, apply CI/CD and Git practices, debug and analyze issues, and collaborate with cross-functional teams to build resilient, scalable systems.

The Frontend Engineer will implement UI features, automate UI testing, and oversee production releases while focusing on user experience in the blockchain space.

Design and implement developer-facing UI from Figma to production using Hotwire (Turbo + Stimulus) and ViewComponents. Own the dashboard, API playgrounds, docs, marketing site, and data visualization. Optimize performance and bundle size, maintain a coherent component system, and ship polished, production-ready front-end with tests and CI/CD.

Design and build next-generation AI-assisted interfaces for complex IP workflows. Lead front-end architecture, rapidly prototype and ship features from user feedback, integrate advanced WYSIWYG editors, and contribute across the full stack to ensure robust, high-performance delivery as a founding engineering hire.

Build high-quality user-facing experiences primarily in TypeScript and React; influence frontend architecture and product design; own tasks end-to-end; collaborate with designers and AI experts; build component libraries and internal tooling; debug backend issues encountered in development; set technical direction and establish engineering conventions.

As a Product Engineer at Atla, you will build user-centric platforms for AI agent evaluation, focusing on frontend development and collaboration with various teams.

As a Senior Frontend Engineer, you'll design user interfaces for a machine learning marketing system, implement applications using React, and collaborate with clients and teams to gather and translate requirements into technical designs.

Own end-to-end features across Java backends and a TypeScript/Angular frontend for a multi-tenant SaaS platform. Design APIs, schema and queries (MySQL/ClickHouse), build performant UIs, write unit/integration/e2e tests, deploy via containers/CI-CD, and integrate LLM/agentic workflows to help users find and fix data quality issues.

Lead frontend work on a TypeScript/Angular product, owning component architecture, state management, performance, and tests. Build data-dense UIs and Storybook-driven components, ship agentic (LLM) features, shape APIs and implement backend Java endpoints, write SQL, mentor engineers, and work directly with product, design, and customers to deliver end-to-end features.

Design, build, and maintain responsive, accessible, high-performance web applications; create reusable components and frontend architectures; collaborate with designers and product teams; participate in code reviews, CI/CD, and agile delivery. Senior engineers provide technical leadership, mentoring, standards, and architecture guidance across teams.

Design, build and maintain responsive, high-performance web and mobile interfaces using React/React Native and TypeScript. Collaborate with Product and Design, translate Figma prototypes, implement monitoring/error tracking, write tests, review code, and improve CI/CD and engineering practices to deliver polished user experiences.

Lead front-end technical strategy across multiple teams for a complex, data-dense merchant platform. Own architecture, component systems, state management, performance, accessibility, and front-end observability. Mentor engineers, drive cross-team alignment, and partner with Product, Design, and backend engineers to deliver a cohesive merchant experience including the Primer AI Companion.

As a Senior Frontend Engineer, you will design, implement, and optimize high-quality features for mortgage products using modern technologies while collaborating with stakeholders to improve user experience and frontend architecture.

As a Senior Front-End Engineer, you will develop responsive web applications using React and TypeScript, collaborate with backend teams, and contribute to product direction.

Lead the design and implementation of core authentication infrastructure at Phantom, focusing on secure authentication systems, secrets management, and API integrations.

Lead front-end engineer on the Mapper Team building scalable data-visualization and real-time multi-user front-end features. Own end-to-end projects, contribute to architecture and processes, mentor peers, participate in hiring, and deliver high-performance, testable, maintainable UI code.