Top Front End Developer Jobs in Spain

Design and implement developer-facing UI from Figma to production using Hotwire (Turbo + Stimulus) and ViewComponents. Own the dashboard, API playgrounds, docs, marketing site, and data visualization. Optimize performance and bundle size, maintain a coherent component system, and ship polished, production-ready front-end with tests and CI/CD.

Full-stack Developers at QuantCo build user interfaces for machine learning solutions, collaborating with data scientists and engineers to deliver actionable products.

Design, build, and maintain performant React/Redux/Vite web applications and data-visualization portals. Collaborate across teams to implement features and RESTful APIs, write tests, perform code reviews, debug complex issues, follow agile and CI/CD practices, refine UX details, and adopt tooling to speed development.

Join Cerebras Systems to optimize and develop frontend compiler infrastructure for PyTorch models on their unique wafer-scale AI platform, focusing on model representation and optimization.

Build and maintain a high-data web platform using modern frontend technologies. Deliver well-structured code, develop SPAs with React/Redux, integrate Node/Express backends, implement testing, use build tools, follow SCRUM, and adapt across environments.

Build and maintain responsive, high-performance user interfaces using React and modern front-end technologies. Translate UI/UX designs into reusable code, integrate with backend APIs, optimize performance and cross-browser compatibility, and contribute to testing, code reviews, and engineering best practices in a product-driven, remote environment.

The role involves developing high-quality Vue.js applications, creating interactions, collaborating with back-end engineers, and writing tests.

Senior frontend developer responsible for designing and delivering high-quality Angular applications, mentoring teammates, driving frontend best practices, participating across the SDLC, ensuring code quality through reviews and testing, and working with CI/CD, APIs, and databases.

The role involves building creative tools for content editing, enhancing features with PixiJS and WebGL, and improving collaboration workflows.

As a Front End Engineer, collaborate to build front-end applications, automate processes, support local teams, and educate squad members while ensuring high-quality software development.

Create high-quality AI-generated videos, avatars, audio, and visual narratives; build lightweight front-ends and demos to showcase AI prototypes; translate technical outputs into reusable client-ready marketing and case materials; collaborate with AI engineers, analysts, and consultants to iterate quickly and polish presentations for internal and client use.

Create high-quality AI-generated content (video, avatars, audio, visuals) and build lightweight front-ends/demos to showcase prototypes. Translate technical outputs into reusable, client-ready marketing and demonstration materials, collaborating closely with AI engineers, analysts, and consultants to iterate quickly and ensure polished, compelling presentations.

As a Frontend Engineer at Proton, you will develop features for Proton Drive, collaborate with teams, conduct code reviews, and implement testing strategies.

Develop and maintain resilient front-end components for Proton VPN, collaborating with engineering teams to enhance user experience and system performance.

Proton seeks a Senior Frontend Engineer to develop React components, lead complex projects, and enhance B2B product functionality while promoting privacy-oriented solutions for businesses.

As a Frontend Engineer, you will develop new features for Proton's services, collaborate with teams, ensure code quality, and implement testing strategies.

The Senior Frontend Engineer will develop and support innovative privacy-centric tools, ensuring seamless user experiences and collaborating with teams to enhance product features while managing software quality and team mentorship.

As a Frontend Software Engineer, you will build user interfaces for Amplemarket's sales platform, collaborating with co-founders and cross-functional teams to enhance product usability and user experience.