Top Front End Developer Jobs in Portugal

Lead frontend development for B2C e-commerce storefronts and B2B vendor portals. Build reusable Next.js components, complex data grids, forms, dashboards, authentication and RBAC interfaces. Manage state with TanStack Query and Zustand, translate Figma designs into responsive UIs, optimize performance, integrate backend APIs, and write tests for critical user flows.

Build and maintain reliable full-stack applications for high-stakes hospital environments, specializing in frontend architecture, design systems, modularity, mobile readiness, and cross-device experiences. Collaborate with design, product, and machine learning teams; mentor engineers on frontend practices; deliver frequent enhancements with minimal regressions; and own projects end to end. Some international travel to hospitals is required for workflow observation and clinical-user collaboration.

Improve frontend developer productivity by enhancing builds, type checking, linting, testing, monorepo tooling, development environments, delivery pipelines, observability, and web performance. Lead tooling upgrades and migrations, build reliable validation and preview environments, collaborate with product and infrastructure teams, and own solutions from technical design through rollout and maintenance.

Build and evolve Synthesia’s marketing website platform, including Astro components, Sanity schemas, design tokens, rendering, SEO, localization, and AI-assisted development tooling. Own features end to end across frontend, server-side systems, APIs, databases, and deployment infrastructure. Translate Figma designs into responsive, accessible experiences, maintain performance and analytics standards, and guide technical direction, code quality, and adoption across website stakeholders.

Lead front-end development for partner-facing financial web products, including embeddable onboarding modules, partner dashboards, and self-service workflows. Build complex multi-step forms and data-heavy interfaces with React and TypeScript, contribute to Node.js server layers, collaborate on API contracts, and work closely with product, design, and backend teams. Own features from design handoff through production release while maintaining multiple codebases and upgrading business-account APIs.

Build and polish complex interactive video-editing features for Studio, including transitions, color grading, element libraries, presets, and customizable keyboard shortcuts. Own frontend-leaning full-stack work from proposal through launch, collaborate in a fast-moving startup environment, and contribute to product decisions and marketing efforts. Deep backend expertise is not required.

Develop and enhance NFON’s cloud-based business telephony platform through scalable frontend components and backend services. Build, test, review, and ship production software using TypeScript, Angular, and potentially Go. Collaborate on architecture, solve technical challenges, improve engineering workflows, and use AI-assisted development tools while critically evaluating generated code. Contribute to reliable, high-performance applications in an agile environment.

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.

Design, develop, deploy, integrate, maintain, and support low-code business applications using Mendix and SAP BTP. Translate business requirements into technical solutions, integrate applications with SAP and third-party systems, perform testing, document solutions, monitor performance, ensure security and quality, and provide technical expertise and mentoring. The role supports digital transformation within an Agile 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 and maintain Keet Desktop, a cross-platform peer-to-peer communications application built with React and the Pear runtime. Responsibilities include implementing UI/UX, optimizing performance, writing maintainable and tested code, debugging complex frontend applications, and contributing to decentralized communication technology. The role involves collaboration within a remote global team and may include desktop application, real-time communication, and open-source development.

Develop and maintain Keet Desktop, a cross-platform peer-to-peer communications application built with React and the Pear runtime. Responsibilities include implementing UI/UX, optimizing performance, writing maintainable and tested code, debugging complex frontend applications, and contributing to decentralized communication technologies in a globally distributed remote team.

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.

Lead the architecture and development of high-performance, secure, scalable frontend applications using React and Next.js. Establish testing strategies with unit, integration, end-to-end, TDD, and shift-left practices. Optimize Core Web Vitals, SEO, accessibility, and user experience while providing technical leadership, mentoring, and architectural direction within Agile Scrum or Kanban teams.

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.

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.

Own the vision, roadmap, backlog, and delivery of API-driven frontend experiences in a headless architecture. Define user stories and API contracts, coordinate backend and architecture teams, steer external development partners, and ensure high-quality, scalable delivery. Champion user experience, Core Web Vitals, analytics, A/B testing, and modern frontend innovation across global brand websites.

Design, develop, and maintain scalable Next/React front-end applications and API middleware. Lead architecture discussions, enforce code quality, write unit/integration/e2e tests, collaborate globally with engineers, product analysts, and architects to deliver performant, accessible user interfaces for Richemont's retail platform.

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.