Top Front End Developer Jobs in Portugal

Develop user-facing web and Electron-based desktop applications using React, JavaScript/TypeScript and Node.js. Collaborate with a small multidisciplinary team of developers, data scientists, and clinicians to build digital health software and clinical algorithms. Communicate effectively with non-technical stakeholders and work in a fast-paced environment.

Design and build purpose-built business applications for public-sector clients across the full product lifecycle. Implement features using Java and React, apply DevOps practices, automated testing and GenAI-assisted development, collaborate closely with customers and cross-functional teams, and travel to client sites in Switzerland and Germany.

Develop and optimize frontend applications using Angular, JavaScript, HTML5, and CSS3. Create testable code, translate UI designs into user interfaces, contribute to frontend architecture, use version control, and apply CSS preprocessing tools. Roles are available across Portugal in hybrid and fully remote settings, with professional development and career growth support.

Develop web applications using VueJS, design REST APIs, write clean and high-quality code, and transform UI designs into JavaScript implementations. The role offers hybrid and fully remote opportunities across Portugal, along with career development, learning opportunities, work-life balance, and team support.

Develop frontend applications using ReactJS, JavaScript, HTML, and CSS. Translate UI designs into clean, high-quality code, contribute to frontend architecture, support continuous integration and application scalability, and collaborate with development teams using Git and SVN. Projects are available across Portugal in hybrid and fully remote arrangements, with English communication required.

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.

Looking for a Frontend Developer with experience in JavaScript and its frameworks, along with HTML5, CSS3, and REST APIs for a collaborative team.

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.

Full-Stack Engineer responsible for developing and maintaining front-end and back-end components, collaborating on product solutions, and improving user interfaces.

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.

Lead front-end technical strategy across multiple teams for a complex, data-dense merchant platform. Own architecture, component systems, state management, performance, accessibility, and front-end observability. Mentor engineers, drive cross-team alignment, and partner with Product, Design, and backend engineers to deliver a cohesive merchant experience including the Primer AI Companion.

Design, develop, implement and maintain web and mobile front ends. Provide technical leadership on UI/UX, create standards and architectures, build responsive, cross-browser interfaces, collaborate with developers and analysts, and deliver prototypes and production-ready implementations.

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.

Design and build high-performance, mobile-first web applications and internal CMS/analytics tools. Own frontend architecture, reusable UI systems, and developer-friendly foundations. Optimize rendering, caching, and Core Web Vitals for high-load environments. Implement complex editors, forms, dashboards, and state-heavy interfaces with strong testing and observability practices.

Own and evolve the marketing website platform: design Sanity content schemas, build Astro components and design-token-driven UI, ensure accessibility (WCAG 2.2 AA), SEO, localization and performance, extend tooling for AI-assisted composition, and ship end-to-end features from schema to production.

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

Serve as a senior Java full-stack engineer building and maintaining backend services for blockchain applications, integrate APIs with React/Vue frontends, design scalable enterprise blockchain solutions, troubleshoot complex backend issues, and collaborate with cross-functional teams to apply best practices.

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

Develop and maintain scalable front-end applications using AngularJS, integrate RESTful APIs, and collaborate with cross-functional teams while ensuring performance optimization and usability.

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.