Top Front End Developer Jobs in Spain

Build and grow Celonis's process modeling library using TypeScript, Angular, and HTML5. Develop graph rendering, dynamic layouts, and interaction logic for complex data sets. Collaborate with Product, UX, and engineering teams, write tested production-quality code, make technical decisions, mentor engineers, and use AI coding tools daily to accelerate development.

Develop, deploy, release, monitor, and maintain frontend applications using React, JavaScript, and TypeScript. Translate business requirements into scalable frontend solutions, collaborate with stakeholders and architects, participate in agile planning and code reviews, and contribute to DevOps, testing, and software engineering communities.

Owns growth engineering initiatives across acquisition and conversion journeys, including landing pages, signup, checkout, subscriptions, and product launches. Builds fast, accessible front-end experiences using TypeScript, React, and Next.js, while contributing to Kotlin or Python backend services. Partners with marketing, CRM, product, design, and analytics teams; runs A/B tests; measures conversion outcomes; contributes to the design system; and ships continuously with monitoring and testing.

Design, develop, and maintain web and mobile applications for Alpaca’s trading API customers. Build responsive, performant, accessible user interfaces and deliver high-visibility features from design through deployment. Collaborate with cross-functional teams, contribute to frontend and backend systems, influence technical strategy, and mentor peers. Work includes trading dashboards, product features, and end-to-end user experiences across frontend and backend platforms.

Build and ship healthcare software across the frontend, API, and database using React, TypeScript, Next.js, tRPC, Prisma, and related technologies. Own features end to end, prototype with AI tools, test with patients and care teams, and improve performance, accessibility, reliability, and scalability. Collaborate closely with company leadership in a fast-paced startup environment while developing trustworthy automation for healthcare delivery.

Own frontend architecture and development for customer onboarding, private-area, billing, savings, and marketing products. Collaborate with international engineering and internal stakeholder teams, deliver customer-facing features, and adapt across business areas in an agile environment. Required expertise includes TypeScript, React, Next.js, GraphQL, CSS-in-JS, testing, and monorepo development. Backend experience with Python, Django, GraphQL, and PostgreSQL is advantageous.

Develop and maintain scalable Vue.js and Nuxt SSR applications for a composable e-commerce platform. Own frontend solutions from technical design through testing and production deployment, improve performance and customer experiences, and collaborate with backend, product, UX/UI, and engineering stakeholders. Participate in Scrum ceremonies and use AI coding tools to accelerate development while maintaining high engineering standards.

Build and evolve Stripe’s UI platform and design system, including reusable components, themes, frontend APIs, documentation, developer tooling, and automated quality checks. Own frontend projects from scoping through rollout, modernize Dashboard foundations, improve accessibility, internationalization, performance, reliability, observability, and developer experience, and collaborate with designers and engineers.

Build and scale a return-management product for eCommerce. Solve challenging frontend problems, own software from infrastructure to product, collaborate with product and e-commerce leaders, iterate quickly, and contribute to a high-performance engineering team in Barcelona.

Lead iOS development for a React Native application, integrating native SDKs, privacy technologies, analytics, advertising, authentication, and deep linking. Build the CircleCI and fastlane release pipeline, manage App Store submissions, write native Swift or Objective-C modules, maintain cross-platform compatibility, and oversee Jest and mobile end-to-end testing. Collaborate with product and backend teams while reviewing code and sharing iOS expertise.

Lead two distributed frontend engineering squads responsible for Grafana’s frontend platform and navigation. Manage and develop senior engineers, oversee hiring and planning, shape technical direction, partner with Product and Design, and own delivery from discovery through rollout. Improve engineering productivity through AI and automation, uphold quality and security standards, support customer and community discovery, and participate in engineering management on-call while driving reliability improvements.

Develop scalable, responsive web applications with React.js, translating designs into accessible, high-quality interfaces. Responsibilities include frontend architecture, state management, performance optimization, API integration, automated end-to-end and unit testing, code reviews, troubleshooting, documentation, and collaboration with backend developers. The role also requires staying current with frontend technologies and contributing to architectural and development best practices.

Build and maintain frontend platform tooling across React web and React Native applications. Develop reusable cross-platform libraries, establish technical standards, guide the team roadmap, support technology migrations, and improve development workflows. Mentor engineers in Barcelona, represent Client Platform across the organization, and promote quality through testing, observability, monitoring, and effective use of AI-assisted development.

Own the frontend architecture and production delivery of a multi-brand consumer platform built with React, Next.js, and TypeScript. Responsibilities include creating a configurable multi-brand system, owning a design system and component library, converting AI-built prototypes into production features, using AI coding agents, and ensuring high UI quality, performance, accessibility, and Core Web Vitals. The role requires autonomous end-to-end ownership and daily production coding.

Leads and mentors a frontend engineering team while remaining hands-on with coding, architecture, code reviews, and technical delivery. Owns migration to Nuxt.js and server-side rendering, performance engineering, Core Web Vitals, and technical SEO. Manages team performance, career development, and work allocation while collaborating with product, backend, and cross-functional stakeholders to deliver scalable, high-quality software.

Develop frontend interfaces and A/B experiments for a health-focused AI product using Vue 3, TypeScript, and Vite. Improve design systems and AI-assisted development workflows, own features from concept through production, collaborate across engineering, design, product, and analytics, and optimize performance, reliability, and development velocity using user data and experimentation results.

Develop and maintain Keet Desktop, a cross-platform peer-to-peer communications application built with React and the Pear runtime. Responsibilities include implementing UI/UX, optimizing performance, writing maintainable and tested code, debugging complex frontend applications, and contributing to decentralized communication technology. The role involves collaboration within a remote global team and may include desktop application, real-time communication, and open-source development.

Develop and maintain Keet Desktop, a cross-platform peer-to-peer communications application built with React and the Pear runtime. Responsibilities include implementing UI/UX, optimizing performance, writing maintainable and tested code, debugging complex frontend applications, and contributing to decentralized communication technologies in a globally distributed remote team.

Develop and maintain responsive frontend applications using TypeScript, integrate APIs and services, implement UI/UX designs, optimize performance and scalability, apply frontend security and data protection practices, troubleshoot issues, participate in code reviews, and contribute to open-source privacy-focused projects.

Build and improve frontend platform capabilities, developer tooling, Golden Paths, CI/CD, deployment workflows, and application architecture. Improve frontend delivery, performance, caching, observability, testing, and developer experience across the stack. Operate production systems, participate in incident response and technical discussions, establish practical standards, and collaborate with product engineers, platform teams, and technical leaders.

Support QA engineers by testing features, designing and executing test cases, documenting and tracking bugs, collaborating with developers and BAs, and participating in sprint planning to improve product quality.

Own end-to-end frontend delivery for AI-powered healthcare products across patient, clinician, and administrative applications. Develop and maintain a large Angular codebase, design scalable architectures, write tested code, improve performance and platform health, and contribute to Nx monorepo, CI/CD, and framework upgrades. Build interfaces for AI features while using agentic development tools. Collaborate cross-functionally and work across API, backend, and SQL layers when needed.

Own and improve testing practices for web applications in an agile environment. Build automated UI, component, end-to-end, API, visual regression, and cross-browser tests; prepare environments and test data; analyze failures; support root-cause investigations; communicate quality metrics; and contribute to continuous testing and delivery. Collaborate with developers, UX, and product stakeholders to identify risks and prevent defects throughout the software lifecycle.

Build and own frontend experiences for Perk Events, a multi-sided group travel and events platform. Define product direction, architect scalable solutions, improve technical quality, manage technical debt, and lead cross-team initiatives. Mentor engineers, raise engineering standards, contribute to design documents, and collaborate with product managers, engineering managers, and architects to deliver impactful customer experiences.

Build and own complex, high-performance frontend experiences for observability products using Angular or another major frontend framework. Lead frontend architecture, translate complex data into intuitive interfaces, collaborate cross-functionally, write tested production code, review code, mentor engineers, and drive features from concept through production.