Top Web Developer Jobs in London

Develop and maintain responsive event websites and marketing emails using Stova and front-end technologies. Collaborate with event planners, clients, stakeholders, and vendors on conference and event execution. Manage multiple projects, test the digital events platform, identify bugs and use cases, follow compliance procedures, and communicate effectively with senior stakeholders.

Build browser infrastructure and web access systems for an agentic search engine operating at internet scale. Research browser communication, fingerprinting, client verification, networking, JavaScript execution, and modern web technologies. Develop browser instrumentation, debugging, observability, and experimentation tooling, then translate technical research into reliable production systems.

Build and maintain Monzo’s public website, scalable international web infrastructure, component library, and content management system. Collaborate with product managers and cross-functional teams to identify opportunities, develop frontend features, and own work throughout the product lifecycle. The role emphasizes performant, secure, scalable web experiences, user experience, data-informed decisions, prioritization, and contribution to a large frontend codebase.

Own Granola’s website from concept through production, combining visual design judgment with front-end engineering. Build high-quality marketing experiences, reusable components, CMS workflows, campaign landing pages, and A/B tests. Improve SEO, performance, accessibility, navigation, pricing, and calls to action while collaborating with marketing, design, and product teams in a London-based, in-person 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.

Design and implement large-scale browser-based rendering infrastructure to execute and extract structured content from JS-heavy web apps. Improve rendering quality, performance, cost, and throughput at internet scale and productionize rendering research.

Build QA processes, test plans, release criteria, and scalable UI, API, and integration automation for Android, iOS, and web clients. Integrate automated testing into CI/CD pipelines, conduct exploratory and release testing on real devices, and validate video playback, purchases, subscriptions, and A/B tests. Track quality metrics, flaky tests, and crash trends while collaborating with Engineering, Product, and Design to improve product quality.

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 web compatibility triage and incident response across DuckDuckGo browsers on Mac, Windows, iOS, and Android. Debug complex web applications and third-party code, distinguish site, browser, and privacy-related issues, reverse-engineer obfuscated code, build durable cross-platform fixes, and develop automation and LLM agent tooling to reproduce and triage breakage. Lead ambiguous projects independently and communicate with technical and non-technical stakeholders.

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.

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.

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.

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.

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.

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.

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.

As a Wordpress Web Developer, you will manage and improve the company website's performance, support teams with technical issues, and ensure effective content sharing.