Top Front End Developer Jobs in Barcelona

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 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.

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 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 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.

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.

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

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.

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

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 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 front-end development for subscription, maintenance, and invoicing applications. Own technical design, implement features with unit/integration tests, participate in code reviews, mentor junior developers, collaborate with product/QA/backend teams, and ensure reliable deployments and integration-to-production quality.

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.

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.

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.

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

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

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.

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

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.