Top Web Developer Jobs in London

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.

Build end-to-end internal products and platform services for Spotify's subscription business, spanning frontend (TypeScript/React/Next.js), backend services (Java), GraphQL/gRPC APIs, and PostgreSQL. Design secure, auditable, SOX-compliant workflows, collaborate on architecture, write well-tested code, and participate in on-call rotations to ensure platform reliability.

Own and manage the company’s WordPress website, improving performance, content structure, information display, and platform effectiveness. Collaborate cross-functionally to support business growth and resolve technical issues for internal teams. The role requires extensive WordPress knowledge, strong communication, organization, prioritization, ownership, and a proactive work ethic. This is a fully office-based position in London, Monday through Friday, with a flexible start date.

Own and manage the company’s WordPress website, improving performance, information structure, content presentation, and platform effectiveness. Collaborate cross-functionally to support business growth and resolve technical issues for internal teams. The role requires extensive WordPress knowledge, website work examples, strong communication, organization, prioritization, initiative, ownership, and a high sense of urgency. This is an in-person position at the company’s London headquarters with a flexible start date.

Build and own critical web and mobile product surfaces for a trading platform. Develop full-stack features using Scala, Play Framework, React, TypeScript, and AG-Grid; lead migration from Codename One to React Native; improve quality, testing, observability, and performance; mentor engineers; support hiring and onboarding; and collaborate with desktop teams on feature parity and architecture.

Lead the rebuild of Phrase’s multilingual marketing website using Next.js, Storyblok, and Vercel. Own the reusable component library, WordPress content migration, accessibility and performance automation, SEO migration implementation, deployments, monitoring, integrations, and ongoing site development. Serve as marketing’s primary technical website contact and independently manage the live platform across six languages using AI-assisted coding workflows.

Build and maintain web and mobile application features across the Scala and Play Framework backend and React, TypeScript, and AG-Grid frontend. Responsibilities include fixing bugs, writing tested and maintainable code, responding to reviews, supporting mobile app evolution, and collaborating with developers, testers, and product stakeholders. The role offers guidance from senior engineers and involves APIs, gRPC integration, agile development, and ongoing product improvement.

Lead front-end development using React and TypeScript to build scalable, performant B2C and B2B features. Drive code quality, testing, and cross-functional delivery within squads. Champion enterprise-authorized AI-assisted engineering practices, SDLC automation, and responsible AI standards while mentoring teammates and contributing to technical decisions.

Build and operate full-stack features for elastic.co using React, TypeScript, and backend services. Own deployment pipelines, performance monitoring, observability, security vulnerability remediation, production troubleshooting, code reviews, and on-call support in a globally distributed team.

Lead the technical direction, architecture, development, testing, and support of the University of Edinburgh’s Drupal-based web publishing platform. Build complex enterprise features, uphold coding and development standards, troubleshoot problems, and mentor junior and mid-level developers. Work collaboratively in an agile, continuous-improvement environment while contributing to the evolution of large-scale open-source web services.

Own and evolve Praktika’s web ecosystem, including marketing sites, onboarding funnels, customer portals, web applications, and internal tools. Lead architecture, development, experimentation, deployment, monitoring, analytics, and integrations with authentication, payment, backend, and feature-flag services. Partner with Product, Marketing, and Growth to run experiments, optimize conversion and retention, and deliver engaging mobile-first experiences in a fully remote, asynchronous environment.

Drive quality assurance for web features from technical handoff through production release. Responsibilities include test planning, test case creation, functional and exploratory testing, regression, UI/UX, cross-browser, responsive, API, and end-to-end testing. Support releases through build validation and monitoring, document and review tests, collaborate with product and engineering teams, improve QA metrics, and optionally contribute to test automation.

Build and test full-stack web features using React, Next.js, TypeScript, and Tailwind CSS. Contribute to backend services and APIs with NestJS and Node.js, while learning AWS, Kubernetes, containers, CI/CD, and AI-assisted development workflows. Collaborate with experienced engineers and stakeholders to deploy production code and develop internal tools and developer-facing platforms for Epic Games services.

Design, build, and maintain end-to-end web solutions, collaborating across teams. Optimize performance, manage backend systems, and stay updated on trends.

Build and maintain internal and public-facing APIs and services powering the Web App and developer experience. Develop API functionality, Admin API systems, WebSocket and REST behavior, and usage and billing integrations with Stripe. Investigate production issues and security vulnerabilities, write and review tested code, make technical decisions, and collaborate across engineering, Product, and Design teams.

Build and operate large-scale distributed web crawlers that discover, fetch, extract, deduplicate, and recrawl billions of pages. Develop targeted pipelines for audio, video, and multilingual data, transforming web content into training-ready datasets. Create infrastructure and tooling for researchers to request, monitor, evaluate, and explore crawled data, while ensuring reliability, efficiency, compliance, politeness, and rate-limit handling.

Build and optimize high-traffic e-commerce user-facing web applications using React or similar frameworks. Collaborate with product and backend teams to integrate APIs, improve frontend performance, ensure cross-browser/device stability, participate in design and code reviews, and adopt new frontend technologies. Work onsite in London.

This role involves managing and improving the company's Wordpress website, optimizing content, supporting cross-functional teams, and addressing technical issues efficiently.

Leads frontend architecture and engineering for large-scale consumer web applications. Defines standards, reusable patterns, and headless API architectures using ReactJS, TypeScript, Next.js, and GraphQL. Drives performance, Core Web Vitals, accessibility, security, experimentation, design systems, and global scalability through CDN and edge technologies. Partners cross-functionally, mentors engineers, influences architecture across teams, and guides technical decisions for reliable, accessible, high-performing digital experiences.

The Ruby Engineer will focus on web scraping and browser automation, fix code issues promptly, support customers, and enhance search engine integrations.

Lead design and development of a high-performance Web SDK for device fingerprinting and behavior analytics. Implement algorithms for fingerprints and interaction capture, optimize cross-browser performance, build CI/CD and automated cross-browser tests, ensure data privacy/security, mentor engineers, conduct code reviews, and collaborate with product and QA to deliver scalable, maintainable SDKs.

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

Looking for developers with e-Commerce platform experience, strong JavaScript skills, and knowledge of HTML/CSS, working on high-profile projects.

Own and develop Unity’s Web runtime, optimizing build size, download, startup, and loading performance. Design and implement low-level improvements across C++, C#, JavaScript, WebAssembly, Emscripten, and LLVM, including multi-threading and progressive asset loading. Collaborate with platform teams, profile and debug across native and browser boundaries, mentor engineers, and establish code quality standards.

Build, design, maintain, and update websites and software applications supporting global language development and Bible translation work. Responsibilities include writing web content, developing with HTML, CSS, JavaScript, APIs, and WordPress, improving SEO, analyzing requirements, supporting users, documenting website management processes, and contributing to product roadmaps. The role requires independent and collaborative work, with travel to development-team meetings and language technology conferences.