Top Front End Developer Jobs in London

The Senior Software Engineer will develop features for Phantom's web platforms, lead new product initiatives, interface with users, and contribute to team culture.

Develop and test front-end components using Microsoft .NET stack (C#) and Visual Studio. Work with MS SQL Server, MFS library, Azure services and rule-engine pub/sub patterns. Handle configuration management, collaborate with stakeholders, and maintain certification in relevant technologies.

The Senior Frontend Engineer will maintain and improve the JavaScript SDK, design user-friendly APIs, ensure security and performance, collaborate with backend teams, and support developer documentation.

As a Senior Frontend Engineer, you'll create production-ready web components using React and TypeScript, optimize performance, and collaborate with teams to deliver complex UIs for AI applications.

As a Front End Engineer, you will develop impactful features, improve platform functionality, and collaborate with product and design teams, emphasizing JavaScript and Python.

The Senior Front-End Engineer will modernize and build front-end projects at Pitchup, utilizing Nuxt.js and Vue.js, while enhancing UI/UX and improving development practices.

Design and implement frontend applications using JS, CSS, React, and Flutter. Collaborate on technical specs and contribute to documentation, ensuring user experience and performance.

Design and develop engaging frontend features for an AI wealth management platform, collaborating with designers and backend engineers, while ensuring high standards in code quality and performance.

The Senior Frontend Engineer will lead the development of the Incard marketing website, focusing on UI quality, performance, SEO, and integrating marketing strategies.

Senior full-stack engineer building high-performance trading systems in TypeScript and Rust. Develop real-time, data-dense React UIs with reactive state management, design distributed systems (REST, WebSockets, TCP/UDP), own end-to-end lifecycle, ensure observability and reliability, mentor peers, and support production incidents.

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 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.

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.

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.

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.

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.

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.

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 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.

The role involves developing high-quality Vue.js applications, creating interactions, collaborating with back-end engineers, and writing tests.