Top Front End Developer Jobs in London

Build and maintain React/Next.js TypeScript frontend applications powering checkout, payments and policy renewal flows. Translate designs into responsive interfaces, integrate with APIs and payment providers, optimize performance, implement transactional workflows, and contribute to reusable frontend architecture and engineering best practices.

Build responsive, high-performance frontend applications using React, Next.js and TypeScript; translate UX designs into scalable component-based interfaces; integrate with backend APIs and workflow engines; optimise performance, maintain reusable components, participate in code reviews, and collaborate with product, design and backend teams to deliver AI-enabled workflow automation features.

Build fast, scalable React/Next.js frontend applications for customer-facing and internal AI-powered insurance workflows. Translate UX requirements into responsive interfaces, integrate with backend APIs and AI services, optimize performance, create reusable components, participate in code reviews, and collaborate with product, design, backend engineers and QA to shape frontend architecture and technical decisions.

Develop new user-facing features, collaborate with designers, manage complex state in frontend applications, and maintain component libraries.

The Senior Front End Developer will lead frontend technical direction, drive feature delivery using Next.js and TypeScript, mentor engineers, and collaborate across teams to enhance UI products.

The Software Engineer will develop, maintain, and test software for Avigilon's VMS, focusing on state management patterns, API integrations, and collaborating with teams on solutions.

Incard is seeking a Senior Frontend Engineer to implement complex frontend projects, focusing on performance and usability using React and TypeScript, among other technologies.

Design and implement real-time web interfaces for retail applications, advocate for user needs, and contribute to system design.

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.

Lead development of customer-facing and internal web applications using Next.js, React and TypeScript. Influence frontend architecture, build reusable components, and improve performance, accessibility, and technical SEO. Drive experimentation/A-B testing, observability and CI/CD best practices, mentor engineers, and collaborate with Product, Design, Marketing and Backend teams to deliver scalable, high-quality web experiences.

The Senior Frontend Engineer will develop cross-platform applications, focusing on user-friendly healthcare interfaces, ensuring performance, accessibility, and HIPAA compliance while collaborating directly with the CEO.

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.

Looking for a Senior Front-End Developer with extensive Vue.js experience to enhance the Jibble 2.0 platform, collaborating closely with product teams.

Lead frontend architecture and build customer-facing React + TypeScript interfaces end-to-end. Own product decisions from customer conversations to shipped features, collaborate with backend and infra as needed, join customer calls, and apply AI/LLM integrations and prompt engineering to ship high-quality, performant, accessible interfaces.

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.

Design and implement high-performance client-side web applications using Angular and TypeScript. Collaborate with product and backend teams to integrate RESTful APIs, apply TDD and unit testing, conduct peer reviews, and experiment with AI tooling to accelerate development of cloud-based 3D visualization tools.

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.

Build production frontend interfaces that expose AI agent behavior and backend APIs to lawyers. Implement agent interaction surfaces, DOCX document review/edit workflows, dashboards and task flows. Develop scalable UI patterns, state management, and abstractions in Next.js/TypeScript to ship trustworthy, reviewable, and reversible UIs for legal 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.

Build and maintain scalable, high-performance React/Next.js TypeScript frontends for engineering workflows. Implement reusable UI components, integrate with REST APIs and modern authentication, improve responsiveness and accessibility, lead frontend architecture, and collaborate with UX, product, and backend teams to ensure code quality and CI/CD practices.

Build and maintain user interfaces, APIs and pipelines; rapidly turn ideas into MVPs; own implementation and architecture; support releases with documentation and maintenance; contribute to code review, tooling, and product demos to drive customer impact.

Work as part of an agile team to design, develop, document and test frontend features for a mission-critical call-taking and dispatch platform. Build high-quality JavaScript/React/TypeScript user interfaces, collaborate with product and test engineers, follow modern development practices (SOLID, Git, pull requests), and support an expansion product while occasionally travelling to UK offices.

Seeking a Front-End Engineer to lead UI architectural evolution, design component libraries, ensure performance, and guide technical leadership in a rapidly growing team.