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 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.

Leads the design and delivery of scalable full-stack software, with a strong frontend focus using React, TypeScript, and Next.js. The role influences architecture, engineering standards, cloud and platform direction, and modern practices such as CI/CD, testing, observability, and DevSecOps. It involves mentoring engineers, partnering with product and architecture stakeholders, supporting production platforms, and contributing to customer channels, data services, and AI-enabled business banking experiences.

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.

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.

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.

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.

Frontend Developer Interns will build, test, document, and maintain UI components and pages for Smart TV applications. They will collaborate with backend engineers, product managers, and UX designers, participate in peer reviews and sprint ceremonies, maintain documentation, and support feature deployments. The role emphasizes JavaScript, React, HTML5, CSS3, responsive design, frontend testing, RESTful API integration, accessibility, video playback, and performance optimization.

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.

Identifies emerging technologies, market signals, and growth opportunities using hypothesis-driven innovation. Designs experiments, validation plans, prototypes, and learning cycles to reduce uncertainty and support decision-making. Analyzes results, develops actionable recommendations, facilitates ideation and co-creation workshops, and collaborates with consumers, customers, suppliers, startups, universities, and technology centers. Leads selected disruptive innovation projects and communicates findings to project teams and leadership. Requires approximately 15–25% travel.

Develop modern React-based interfaces for investment risk applications using JavaScript, TypeScript, HTML, and CSS. Shape frontend architecture, reusable components, usability, accessibility, performance, and design consistency. Collaborate with business, product, backend, testing, and architecture teams to translate complex workflows into intuitive solutions. Integrate Java and Spring services, support APIs and authentication flows, participate in testing and deployment, and provide technical ownership and guidance for UI development.

Develop and lead frontend UI development for investment risk modernization using React, JavaScript, TypeScript, HTML, and CSS. Shape frontend architecture, reusable components, usability, accessibility, and performance while integrating Java and Spring backend services. Collaborate with analysts, product stakeholders, testers, architects, and developers throughout the delivery lifecycle. Guide UI technical decisions, review code and designs, support releases, and improve engineering standards and user experiences.

Build and optimize ZOE’s customer-facing website using TypeScript, React, and Next.js, with a strong focus on accessibility, performance, responsive design, and design-system development. Collaborate with designers, analysts, and product teams on user experiences and A/B testing. Contribute to backend services using Kotlin or Python, support API development, write maintainable code, and ship production improvements regularly.

Lead the frontend architecture and migration from Svelte to React, evolve the design system, improve performance, accessibility, testing, developer experience, and technical quality across teams. The role requires staff-level technical leadership, cross-functional influence, mentoring, strong product judgment, and practical use of AI coding and agentic development tools.

Develop and evolve frontend architecture for cloud-native AWS applications. Build React.js interfaces using Redux and Hooks, optimize performance, implement and test software, fix bugs, maintain production systems, collaborate with cross-functional teams, evaluate technologies, and incorporate user feedback. The role involves delivering greenfield software in an Agile, DevOps-oriented environment.

Design, develop, test, deploy and monitor software modules in a cross-functional Agile/DevOps team. Collaborate with architects and business stakeholders, participate in planning, PR reviews, and knowledge-sharing; deliver high-quality code following TDD/BDD and CI/CD practices.

Build and maintain full-stack product features with a strong frontend focus. Responsibilities include evolving frontend architecture, backend services, tooling, and the custom design system; improving performance, reliability, and developer experience; writing unit and end-to-end tests; and collaborating with product, design, QA, and engineering teams. Senior engineers also influence architecture, own design-system development, guide performance decisions, shape UX solutions, and mentor teammates.

Build and maintain scalable full-stack product features with a frontend focus. Contribute to frontend architecture, backend services, design systems, testing, performance, reliability, and developer experience. Collaborate with product, design, QA, and engineering teams to shape solutions. Senior engineers also influence architecture, own the design system, guide performance decisions, and mentor teammates.

Own Restate’s frontend product experience, building fast, accessible, secure interfaces for monitoring durable workflows and distributed systems. Develop data-intensive timelines, charts, filtering, search, live updates, client state, and shared components. Collaborate directly with design, engineering, and founders from concept through production. Improve performance, usability, testing, information design, and safe handling of untrusted content while contributing to API and backend discussions when needed.

Lead and mentor frontend software engineers, guide frontend platform architecture, contribute to code and technical design, and build scalable, performant web experiences. Partner with Product and Design to translate business needs into technical solutions, improve engineering standards and tooling, and drive enhancements in quality, reliability, developer experience, and delivery.

Build and improve high-quality web products and reusable design-system components. Own frontend performance, including data loading, caching, server rendering, and streaming. Apply strong product judgment to complex UX problems and collaborate with designers, engineers, and product leaders. Work autonomously across products, establish frontend quality standards, and help elevate team practices through technical leadership and craftsmanship.

Lead frontend architecture and development for high-traffic, real-time booking interfaces. Build reusable UI systems, shared data-access layers, and real-time synchronization features. Drive frontend migrations into a monorepo, improve TypeScript and CI tooling, establish testing and monitoring practices, ensure reliable releases, and mentor engineers across product squads.

Verify the front end of high-performance RISC-V CPU cores, including instruction fetch, branch prediction, decode, dispatch, and speculative execution. Develop verification strategies, SystemVerilog/UVM testbenches, constrained-random tests, assertions, and functional coverage. Debug RTL and simulation failures using waveforms and collaborate with CPU architects, RTL designers, and software teams to identify root causes and ensure correctness across workloads and corner cases.