Top Front End Developer Jobs in Spain

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 grow Celonis’s process modeling library using TypeScript, Angular, and HTML5. Develop graph rendering, dynamic layouts, and interaction logic for complex datasets. Apply AI coding tools daily, collaborate with Product and UX, write tested code, make technical decisions, and mentor engineers.

Design, build, and maintain complex, high-performance Angular frontend applications. Architect reusable component libraries and state management, integrate REST and real-time data, optimize performance and accessibility, write tests and participate in code reviews, and mentor junior engineers.

Build and maintain front-end features and developer-facing tooling for New Relic One using modern JavaScript/TypeScript. Select frameworks, produce performant CLI tools, automate developer tasks, collaborate on UI best practices, and implement CI pipelines and testing.

Build and deploy software for Stripe’s financial infrastructure, specializing in frontend or related technical areas. Collaborate on multi-person coding projects, learn unfamiliar systems, contribute to large codebases, participate in code reviews, and safely update production systems. New graduates are expected to apply strong programming fundamentals, communicate clearly, use AI tools responsibly, and solve complex technical problems with increasing independence.

Build performant, reusable frontend interfaces for complex finance and business-planning workflows, including data visualizations, customization tools, modeling components, and real-time calculations. Collaborate with product, design, operations, and engineering teams; incorporate customer feedback; optimize data structures and application performance; maintain observability; and take operational ownership of developed components.

Design, architect, implement, and maintain React and TypeScript web applications. Develop responsive HTML/CSS pages and email templates optimized for SEO and Core Web Vitals. Write unit and integration tests, solve technical challenges, collaborate with the team, and take ownership of project delivery. Preferred experience includes Redux, React Query, Jest, Cypress, and SSR/SSG frameworks such as Next.js, Astro, or Remix.

Develop and deploy performant frontend applications using React, TypeScript, JavaScript, Redux, and Next.js. Analyze requirements, resolve technical issues, support legacy C# and .NET applications, and collaborate with distributed Agile teams. Integrate AWS infrastructure, maintain CI/CD practices, write automated tests, implement accessible UI systems, and uphold clean-code and security standards. Preferred experience includes Node.js, NoSQL, GraphQL, monitoring tools, and AI productivity tooling.

Build and maintain complex web applications with a frontend focus and reliable backend integrations. Design architectures, develop responsive React applications, optimize performance and scalability, manage testing, and support deployments. Collaborate with product, UI/UX, production, management, and external stakeholders. Contribute to technical decisions, mentor junior engineers, participate in hiring, automate processes, and promote engineering knowledge sharing.

Own complex frontend features across web and mobile, design React and React Native systems, improve rendering and runtime performance, and build maintainable shared abstractions. Collaborate with product, backend engineering, and QA to deliver simple user experiences. Maintain quality through code reviews and unit, end-to-end, and visual-regression testing while mentoring colleagues and improving frontend engineering standards.

Shape frontend architecture and technical direction across React, React Native, and an Nx monorepo. Own shared libraries, platform capabilities, design-system foundations, developer tooling, performance, testing, migrations, and developer experience. Diagnose systemic web and mobile issues, remain hands-on with implementation and investigation, influence cross-team decisions, partner with product and engineering, and mentor senior engineers while improving reliability and product quality.

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.

Build, test, and optimize responsive web applications using Next.js and React. Collaborate with designers and back-end engineers to implement high-performance, cross-browser UIs, manage state with Redux/Context API, integrate RESTful APIs, and debug front-end issues while following best practices and maintaining clean, scalable code in a remote team.

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 frontend engineering for CTV Smart TV applications: improve architecture and coding standards, design and deliver web app features, perform code reviews, ensure timely delivery, collaborate with backend/product/UX, and track SLAs, KPIs and team objectives.

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.

Build and ship secure, reliable React applications for critical banking journeys. Responsibilities include developing frontend features, evolving component libraries and state-management patterns, implementing testing and CI/CD practices, embedding accessibility, security, and regulatory compliance, improving delivery quality and observability, monitoring production health, resolving incidents, collaborating cross-functionally, documenting frontend standards, and mentoring engineers.

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.

Build and architect high-performance, data-rich interfaces using React and TypeScript for observability products. Own frontend architecture, state management, component patterns, visualization, testing, and performance across massive datasets. Collaborate with product, design, and backend teams to deliver user-facing features, leverage AI coding tools, advocate for user experience, and mentor engineers. Experience with observability, OpenTelemetry, cloud-native technologies, and startup environments is advantageous.

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.