Top Front End Developer Jobs in Spain

Build and modernize Productboard’s frontend platform, migrating its legacy design system to Spark UI. Design AI-ready module boundaries, API contracts, documentation, and agent workflows involving tool use and autonomous execution. Develop high-performance React applications, validate experiments with users, collaborate with product and design teams, own features through production, mentor engineers, and share engineering knowledge across the organization.

Lead and grow a Valencia-based cross-platform frontend team (web, iOS, Android). Hire and develop engineers, define engineering operating model (CI/CD, testing, security, accessibility, observability), coordinate with Product/Design/Backend, drive delivery of card-management features to production, set quality thresholds, and establish predictable planning, release cadence and incident learning.

The Software Engineer will join the Frontend team to improve and maintain software tools, develop user interfaces, and collaborate with team members on coding standards and new features.

Build and maintain user-facing features and interfaces for Restream web services. Design and implement UI and business logic, collaborate with product designers and engineers, perform code reviews, improve reliability and scalability, and evaluate emerging technologies.

Design and implement complex customer-facing frontend features using TypeScript and React. Provide technical leadership, mentor junior engineers, drive frontend architecture and best practices, improve performance and accessibility, partner with product/design, integrate with backend APIs, and manage technical debt and scalability.

As a Senior Front-End Software Engineer, you'll design and implement services, contributing to the architecture and product strategy in a fast-paced environment.

Lead frontend architecture and development for Collate’s AI data platform. Build performant React and TypeScript experiences, establish reusable design systems, improve testing and CI/CD quality, translate complex data workflows into intuitive interfaces, mentor engineers, lead architectural decisions and code reviews, and enhance frontend tooling, documentation, and development workflows.

The Senior Frontend Engineer will optimize and refine existing code, implement UX/UI improvements, and maintain high code quality, working autonomously and collaboratively with designers and engineers.

SynergyOS seeks software engineers for backend, frontend, and DevOps roles to build a productivity platform for enterprises, enhancing office workflows.

Develop Vue.js components for a dashboard, create data visualizations, debug code, and collaborate with team members in an agile environment.

The role involves designing, building, and implementing new services, working closely with the product team, and taking ownership of projects from 0 to 1.

The Frontend Web Developer will create visually engaging web applications, collaborate with designers and backend developers, and optimize performance for a superior user experience.

Build and improve Restream’s web interfaces and user-facing features for the AI Clips team. Design UI and business logic, collaborate with product designers, participate in code reviews, improve system reliability, and evaluate emerging technologies. The role requires strong JavaScript and TypeScript expertise, advanced React knowledge, CSS preprocessor experience, and familiarity with backend development, cloud infrastructure, containers, and continuous deployment.

Lead the design and engineering of user interfaces and dashboards for Roche's digital products, mentoring junior engineers and driving technical solutions.

Senior UI developer responsible for designing and building responsive React-based UIs and dashboards for cybersecurity analytics. Develop backend services and APIs in Python, integrate security data sources, optimize SQL Server/PostgreSQL reporting, collaborate with stakeholders, influence architecture, and mentor junior developers.

Design, develop, and maintain cloud-based APIs, microservices, and integrations. Contribute to system architecture, write maintainable code, perform testing/debugging/optimization, mentor junior engineers, participate in code reviews, and collaborate with cross-functional teams to deliver scalable solutions using DevOps and cloud automation practices.

Develop server-side applications using Kotlin and Java, collaborate with teams to enhance Atlassian plugins, and ensure code quality through testing and reviews.

Lead design and implementation of scalable, secure, and high-performance React frontend applications. Build reusable components and design systems, drive architecture and best practices, mentor engineers, ensure testing, accessibility (WCAG), performance and security, and collaborate with product, UX, backend and QA to deliver production-ready features.

Develop and maintain scalable web applications using Vue.js, Nuxt 3, and TypeScript. Collaborate in Agile squads, own features end-to-end, ensure code quality with automated testing, and improve engineering standards for international e-commerce clients.

As a Frontend Engineer, you will build and enhance frontend solutions for financial configurations, develop internal tools, and create customer-facing interfaces, ensuring high performance and quality in financial applications.

The Staff/Lead Fullstack Engineer will enhance the Mimica Webapp by architecting scalable UI components, managing large datasets, and optimizing performance while collaborating with cross-functional teams.

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.

As a TypeScript developer, you'll write clean code, develop front-end solutions, and utilize various web technologies to enhance home design experiences.

Seeking a Frontend Developer skilled in TypeScript and JavaScript, with experience in web development and 2D/3D graphics, to join our team.

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