Top Front End Developer Jobs in Lisbon

Develop and maintain the Investment Solutions frontend portal using TypeScript and modern web technologies. Write high-quality, tested, maintainable code; contribute to technical decisions, security, code quality, and technical debt reduction. Collaborate with engineers, designers, product owners, and business analysts, while mentoring team members and delivering user-focused features in an international environment.

Develop and maintain frontend features using React and backend functionality using Python on the CAP platform. Support data pipeline development and data preparation, onboard new country and use cases, provide technical support, create environments, and participate in Agile squad rituals while collaborating with technical leads, product owners, and business analysts.

Own the frontend architecture and production delivery of a multi-brand consumer platform built with React, Next.js, and TypeScript. Responsibilities include creating a configurable multi-brand system, owning a design system and component library, converting AI-built prototypes into production features, using AI coding agents, and ensuring high UI quality, performance, accessibility, and Core Web Vitals. The role requires autonomous end-to-end ownership and daily production coding.

Leads and mentors a frontend engineering team while remaining hands-on with coding, architecture, code reviews, and technical delivery. Owns migration to Nuxt.js and server-side rendering, performance engineering, Core Web Vitals, and technical SEO. Manages team performance, career development, and work allocation while collaborating with product, backend, and cross-functional stakeholders to deliver scalable, high-quality software.

Develop frontend interfaces and A/B experiments for a health-focused AI product using Vue 3, TypeScript, and Vite. Improve design systems and AI-assisted development workflows, own features from concept through production, collaborate across engineering, design, product, and analytics, and optimize performance, reliability, and development velocity using user data and experimentation results.

Develop and maintain responsive frontend applications using TypeScript, integrate APIs and services, implement UI/UX designs, optimize performance and scalability, apply frontend security and data protection practices, troubleshoot issues, participate in code reviews, and contribute to open-source privacy-focused projects.

Build and maintain high-performance JavaScript and TypeScript SDKs, payment components, and merchant-facing web applications. Develop responsive, accessible, secure interfaces handling complex payment data and workflows. Collaborate across Product, Design, and Engineering, contribute to backend-for-frontend services, optimize performance, implement testing and observability, and manage client library versioning and documentation. The role requires strong browser fundamentals, React experience, visual craftsmanship, and familiarity with security-sensitive transactional environments.

Build and improve a high-volume, mobile-first checkout experience supporting global payment flows, methods, currencies, and languages. Responsibilities include integrating payment SDKs, improving web performance and stability, analyzing product data and experiments to increase conversion, investigating production issues across frontend and backend systems, and contributing to technical decisions and code quality.

Own frontend delivery for AI-powered mental healthcare products using a large Angular monorepo. Develop, test, and release patient-facing and internal applications; improve architecture, performance, platform health, CI/CD, and NX structure. Build interfaces for AI features and use agentic coding tools in daily development. Collaborate cross-functionally while occasionally working across SQL, backend endpoints, and APIs.

Build high-performance, data-dense financial UIs with React and TypeScript, including virtualized grids, real-time views, reusable MUI components, and accessible workflows. Architect Node.js/TypeScript Backend for Frontend services, integrate backend APIs, optimize web performance, and collaborate with product, design, engineering, and business stakeholders. Contribute to AI-assisted development, legacy application migration, and agent-enabled user experiences.

Build and own complex, high-performance frontend experiences for observability products using Angular or another major frontend framework. Lead frontend architecture, translate complex data into intuitive interfaces, collaborate cross-functionally, write tested production code, review code, mentor engineers, and drive features from concept through production.

Lead the migration from Svelte to React, shape frontend architecture and design systems, improve performance, accessibility, testing, developer experience, and UX quality across teams. Guide cross-team initiatives, establish engineering standards, mentor senior engineers, influence technical direction, and advance effective agentic AI development practices. Translate complex product workflows into scalable, maintainable user experiences while collaborating with Product, Design, Engineering, and leadership.

Build and maintain scalable, highly available frontend applications using React and Redux. Collaborate with UX designers, develop Google Looker Studio dashboard widgets, contribute to Agile requirements and architecture, and leverage GCP, CDN, and NoSQL technologies. Own production code, including on-call support and troubleshooting, while documenting solutions and ensuring performance, reliability, and operability.

Build and improve high-quality web products and reusable design-system components. Own frontend performance, including data loading, caching, server rendering, and streaming. Apply strong product judgment to complex UX problems and collaborate with designers, engineers, and product leaders. Work autonomously across products, establish frontend quality standards, and help elevate team practices through technical leadership and craftsmanship.

Designs and leads sophisticated frontend applications for AI-powered digital agents. Responsibilities include building real-time conversational interfaces, reusable web components, streaming interactions, human handoffs, API integrations, accessibility, security, performance, observability, and analytics. The role influences frontend architecture, leads complex initiatives, conducts technical reviews, troubleshoots production issues, establishes engineering standards, and mentors engineers while collaborating with Product, UX, backend, AI/ML, and platform teams.

Build and operate production AI backend systems powering inference and orchestration. Responsibilities include designing reliable low-latency services, optimizing inference, caching, batching and streaming, supporting monitoring and incident response, and debugging distributed systems under load. The role requires backend engineering fundamentals, familiarity with LLMs, embeddings and multimodal AI, and the ability to deliver stable APIs integrated with frontend and machine learning systems.

Lead a hands-on frontend engineering team building partner acquisition and onboarding products. Architect scalable frontend and backend systems, oversee React and TypeScript development, integrate Kotlin, AWS, and Salesforce workflows, and establish experimentation infrastructure with Growthbook. Drive A/B testing, AI-assisted engineering practices, modern SDLC standards, code reviews, system design, and team performance across six engineers.

As a Front-End Web Developer, you'll create high-performance web applications, collaborating with designers and back-end developers to optimize user interfaces using modern technologies.

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.

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

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.

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 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.

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.