261 Empregos para React Js - Portugal

# Think Data Be Smart #

About Us:
DataSmart
is a Portuguese company, positioning itself as a consulting company of excellence, with over 20 years of existence. We are specialized in Technologies and Information Systems services, for the Portuguese and International markets. We pride ourselves on fostering a culture of involvement, experience, and excellence.

Join our team as a
Frontend Developer
(Hybrid – Lisbon)

What You'll Do:

• Develop and maintain high-quality, responsive user interfaces using
  React
  and modern
  JavaScript
  (ES6+).
• Collaborate with designers, backend developers, and product managers to deliver seamless, user-centric experiences.
• Implement state management solutions (Redux, Zustand, Context API) to ensure data consistency and performance.
• Integrate with REST and GraphQL APIs, handling async data flows, errors, and loading states gracefully.
• Write clean, maintainable, and testable code using Jest, React Testing Library, and Cypress.
• Ensure UI performance and accessibility, optimizing rendering and applying best practices such as memorization and lazy loading.
• Contribute to our design system and component library, following principles of Atomic Design and reusability.
• Participate in code reviews, CI/CD pipelines, and continuous improvement of our frontend architecture.
• Stay up to date with the latest trends and tools in the React ecosystem and share insights with the team

Qualifications
:

• Strong knowledge of JavaScript (ES6+):
• Advanced experience with React and its ecosystem
• Styling and UI:
  Modern CSS (Flexbox, Grid), Preprocessors (SASS/LESS), Frameworks such as Tailwind, Material UI, or Chakra UI, Responsive and mobile-first design
• API integration (REST & GraphQL):
  data fetching, async handling, error management, and loading states.
• Testing:
  Jest, React Testing Library, Cypress, or Playwright.
• Development tools:
  Git/GitHub, Webpack or Vite, ESLint and Prettier, CI/CD (GitHub Actions, Vercel, or Netlify).
• Code quality and architecture best practices:
  componentization, separation of concerns, Atomic Design, performance optimization (memorization, lazy loading).

At
DataSmart
, you will have the opportunity to integrate into a solid company and participate in highly recognized projects, both nationally and internationally, with an appealing technological environment and career progression.

Excellence in the way to the future

Connect with Us:
Follow us on LinkedIn for updates on career opportunities, company news, and industry insights For further details, visit us at

Responsabilidades

• Gerir implementações e evoluções em sites WordPress.
• Configurar DNS, servidores, hosting e migrações.
• Desenvolver e personalizar temas e plugins.
• Assegurar a segurança, manutenção e escalabilidade dos projetos.

Gestão de WordPress

• Configuração e manutenção de WordPress.
• Personalização de temas e plugins (próprios ou de terceiros).
• Implementação de medidas de segurança e performance.

Administração de Sistemas & DNS

• Configuração e gestão de DNS (A, CNAME, MX, TXT, SPF, DKIM, DMARC).
• Experiência com servidores (Apache, Nginx) e painéis de controlo (cPanel, Plesk).
• Migrações de sites e integração de CDN/SSL.

Desenvolvimento Web

• PHP
  (desenvolvimento de temas/plugins).
• HTML5, CSS3 e JavaScript (ES6+)
  para front-end dinâmico.
• jQuery
  (manutenção de funcionalidades legadas).
• (valorizado, pela relevância no editor Gutenberg).
• , npm e bundlers
  (Webpack, Vite, Gulp) para automação e build de temas.
• MySQL/MariaDB
  para queries e otimização de bases de dados.
• Integração com
  REST APIs
  .
• Versionamento com
  Git/GitHub
  .

Outros Conhecimentos Valorizados

• Experiência com Google Tag Manager e GA4.
• Segurança cibernética: hardening de WordPress, backups, firewalls.
• Conhecimentos de CI/CD para deploy contínuo.

At CONTISYSTEMS we believe that each person contributes in a unique way so that we can continue to be recognized as a brand that is synonymous with ideas and efficiency.

Our people are passionate about the challenge and focused on results.

We are proof that creativity, dreams, experience, joy and ambition can all be characteristics of the same person. Become one of us.

We are looking to strengthen our team with a Front-End Developer with the following profile:

Main responsibilities:

• Developing and maintaining responsive, accessible and optimized web interfaces.
• Implementing reusable and scalable components, following design patterns and good architectural practices.
• Collaborate with product, UX/UI and back-end teams to deliver complete solutions.
• Ensuring code quality through unit, interface and integration tests.
• Monitor technological trends and propose continuous improvements to products and processes.

Technical requirements:

• Solid fundamentals: HTML5, CSS3, JavaScript (ES6+).
• TypeScript.
• Main framework: React.
• Experience with additional frameworks valued: , Angular,

Good practices valued:

• Applying design patterns to the front-end.
• Architecture of reusable components.
• Accessibility (A11y).
• Responsive and mobile-first design.

Tests and qualities:

• Unit testing.
• UI testing.
• Integration tests.

Personal profile:

• A collaborative mindset and a love of multidisciplinary teamwork.
• Detail orientation and quality of delivery.
• Ability to learn continuously and adapt to new technologies.

Conditions:

• Dynamic and collaborative work environment, with a focus on sustainability and technology;
• Competitive remuneration, aligned with objectives and results;
• Various opportunities for professional development;
• Integration into a leading company in the sector.
• Health insurance.

Applications must be submitted using the form below.

In line with our principles of inclusion, diversity and non-discrimination, the analysis of applications will be carried out respecting the principles of equal opportunities and in accordance with our Data Protection and Privacy Policy.

Only selected candidates will be contacted and all other applications will be stored in the system for a period of one year, unless we are informed otherwise.

Summary

We are looking for an
experienced Front-End Developer
with
Angular expertise
(€30k - €45k / year).

This is a
temporary
position
to cover maternity leave (
6 months
), with a hybrid model 2x/ week in the office, in Lisbon.

You will be responsible for designing, building, and maintaining scalable, user-friendly web applications. The ideal candidate combines solid programming skills with an eye for detail and a passion for delivering high-quality user experiences.

What You'll Do

• Develop, test, and maintain web applications using
  Angular
  .
• Collaborate with designers, backend engineers, and product managers to deliver seamless solutions.
• Write clean, maintainable, and well-documented code.
• Optimize applications for speed, scalability, and usability.
• Implement responsive designs and cross-browser compatibility.
• Participate in code reviews and contribute to best practices.

What We're Looking For

• 3+ years of experience in frontend development (Angular required).
• Strong knowledge of
  JavaScript/TypeScript, HTML5, CSS3, and SCSS/SASS
  .
• Hands-on experience with
  Angular 10+
  (components, services, RxJS, state management).
• Experience consuming and integrating
  RESTful APIs
  .
• Familiarity with
  Git
  and CI/CD workflows.
• Understanding of responsive design, cross-browser compatibility, and accessibility standards.

Why you should work with us

If you're looking to build an exceptional career with an award-winning company you've come to the right place. We believe everyone at our company has a vital role to play in our success. Our company is fuelled by curiosity and is a place for people who beam with positivity and burn with ambition.

Our team is everything, so we'll take good care of you. In fact, we give well-being the same priority as our other business goals. We're strong advocates of work-life balance, offering hybrid working alongside the opportunity to work from modern, collaborative offices.

• Competitive salary
• Health insurance
• Flexible
  working hours
• Hybrid
  working model (twice a week, office in Lisbon)
• 24 days PTO,
  adding 1 day each year after the first 2 years (up to 29 days)
• Generous
  family leave policies
• Well-being allowance
  to go towards any physical or mental health activity
• Annual company trip
  that alternates between the UK and Lisbon, Portugal

Who we are

We are ranked as the UK's #1 construction specific software player and our mission is simple; to provide market leading end-to-end software solutions to the construction and construction like industries across the entire build life cycle.

If you are looking to build an exceptional career with an award-winning company you've come to the right place. Our teams are based in the UK, Europe, and India, working on products that are used on a global scale. We have a clear and defined road map to deliver over the next 3 years, which is centred around a large-scale digital transformation as well as continuing our growth and expansion.

We embrace diversity and equality and want our employees to be comfortable bringing their whole selves to work. We are committed to building a team with a variety of backgrounds, skills and views. Creating a culture of Equality isn't just the right thing to do, it improves every aspect of our business.

Hi Interactive is looking for a Front End Outsystems Developer- Junior- to be a part of our Amazing intern Team .

Remote/Hybrid- with some visits to the client´s office in Lisbon

Qualifications

• Strong Knowledge in CSS;
• Good Knowledge in the OutSystems platform;
• English level B2 ;
• Portuguese Language (mandatory);
• Professional experience as a developer 1+ year;
• Experience in component development 6+ months;
• Good Knowledge in the OutSystems platform;
• OutSystems certification(nice to have);
• English level B2 ;
• Bachelor's degree or equivalent in relatable areas (nice to have).

Soft Skills

• Empathy;
• Detail oriented;
• Assertivity;
• Creativity and problem-solving;
• Desire for learning;
• Commitment to work;
• Team player;
• Flexibility and adaptability;
• Proactivity.

WPP is the creative transformation company. We use the power of creativity to build better futures for our people, planet, clients, and communities.

Working at WPP means being part of a global network of more than 100,000 talented people dedicated to doing extraordinary work for our clients. We operate in over 100 countries, with corporate headquarters in New York, London and Singapore.

WPP is a world leader in marketing services, with deep AI, data and technology capabilities, global presence and unrivalled creative talent. Our clients include many of the biggest companies and advertisers in the world, including approximately 300 of the Fortune Global 500.

Our people are the key to our success. We're committed to fostering a culture of creativity, belonging and continuous learning, attracting and developing the brightest talent, and providing exciting career opportunities that help our people grow.

Why we're hiring:

This program of work is central to WPPs' continued success, helping augment their world class AI with a back-office workflow platform. The value add is to enable agencies to manage their work end to end within our innovate platform.

This is a greenfield program of work to replace their existing workflow system with bespoke .Net development using a microservice architecture in Azure and Kubernetes.

What you'll be doing:

We are looking for a talented Senior Front-End Developer to join our dynamic team. This role will focus on building and maintaining high-quality web applications with a focus on ReactJS (or similar frameworks), micro frontends, Test-Driven Development (TDD), and automation testing. If you're passionate about creating seamless, scalable, and maintainable user interfaces, we'd love to meet you

This role will report into the Tech Lead of your work stream or into the Senior Director of Development.

• Design, develop, and maintain modern web applications using ReactJS (or similar front-end frameworks).
• Architect and implement micro frontends to ensure modular, scalable, and efficient solutions.
• Collaborate with cross-functional teams (design, backend, product) to deliver seamless user experiences.
• Ensure the quality of code through Test-Driven Development (TDD) practices and write unit, integration, and end-to-end tests.
• Implement automation testing frameworks to improve testing efficiency and coverage.
• Optimize front-end performance for speed and scalability.
• Participate in code reviews and provide constructive feedback to junior developers.
• Stay up to date with the latest front-end development trends, tools, and best practices.
• Mentor and guide junior and mid-level developers, fostering a collaborative and growth-oriented environment.

What you'll need:

• Strong experience in ReactJS or similar modern JavaScript frameworks , Angular, etc.).
• Proven experience working with micro frontends architecture and principles.
• Solid understanding of Test-Driven Development (TDD) and hands-on experience in writing testable code.
• Familiarity with automation testing tools and frameworks (e.g., Jest, Cypress, Selenium).
• Deep knowledge of HTML5, CSS3, and JavaScript (ES6+).
• Experience with state management libraries like Redux, Recoil, or similar.
• Strong understanding of version control systems, especially Git.
• Knowledge of RESTful APIs and integrating front-end with back-end services.
• Familiarity with build tools like Webpack, Babel, and task runners like Gulp or Grunt.
• Excellent problem-solving skills and ability to work autonomously.
• Strong communication skills and ability to work in an agile team environment.

Nice to have:

• • Experience with containerization and Docker.
• Knowledge of cloud-based platforms (e.g., AWS, Azure, Google Cloud).
• Experience with CI/CD pipelines and DevOps practices.

Who you are:

You're open: We are inclusive and collaborative; we encourage the free exchange of ideas; we respect and celebrate diverse views. We are open-minded: to new ideas, new partnerships, new ways of working.

You're optimistic: We believe in the power of creativity, technology and talent to create brighter futures or our people, our clients and our communities. We approach all that we do with conviction: to try the new and to seek the unexpected.

You're extraordinary: we are stronger together: through collaboration we achieve the amazing. We are creative leaders and pioneers of our industry; we provide extraordinary every day.

What we'll give you:

Passionate, inspired people – We aim to create a culture in which people can do extraordinary work.

Scale and opportunity – We offer the opportunity to create, influence and complete projects at a scale that is unparalleled in the industry.

Challenging and stimulating work – Unique work and the opportunity to join a group of creative problem solvers. Are you up for the challenge?

We believe the best work happens when we're together, fostering creativity, collaboration, and connection. That's why we've adopted a hybrid approach, with teams in the office around four days a week. If you require accommodations or flexibility, please discuss this with the hiring team during the interview process.

WPP is an equal opportunity employer and considers applicants for all positions without discrimination or regard to particular characteristics. We are committed to fostering a culture of respect in which everyone feels they belong and has the same opportunities to progress in their careers.

A Widgilabs é uma das principais agências de WordPress para empresas, sediada em Lisboa, Portugal. O seu portefólio inclui marcas de renome como o Observador, , Forbes Portugal, UNICEF Portugal, Unbabel, Seedrs, ANACOM, Agenda Cultural de Lisboa, Uniplaces, entre outras, o que os torna uma referência para empresas que procuram criar websites e experiências digitais de excelência.

Requisitos

• Licenciatura na área de Engenharia Informática ou similar
• Domínio de (3+ anos)
• Bons conhecimentos de HTML5, CSS3 e JavaScript (5+ anos)
• Conhecimentos de PHP para ajustes e desenvolvimento básico
• Experiência em integração de frontends personalizados
• Conhecimentos de ferramentas de build (ex: Vite, Webpack)
• Uso de Git para versionamento de código
• Noções de UX/UI
• Capacidade de comunicação e trabalho em equipa
• Autonomia e proatividade na resolução de problemas
• Atenção ao detalhe e foco no utilizador
• São valorizados conhecimentos em

Principais responsabilidades

• Implementar layouts em HTML/CSS/JS com base em ficheiros Figma com os layouts Web e mobile.
• Demonstrar sensibilidade face ao design da interface do utilizador e atenção ao detalhe

O que oferecemos

• Uma oportunidade de trabalhar numa empresa líder e inovadora
• Desenvolvimento contínuo de habilidades e carreira
• Uma cultura de trabalho colaborativo e de apoio
• Remuneração competitiva e pacote de benefícios

Consulta os requisitos e envia o teu CV para

Mutual Respect, Empathy, Innovation and Professional Pride. Do you identify with these values?

Founded in 2006 with the mission "To Challenge Complexity," Closer Consulting is a Data Science company specializing in Business Intelligence, Advanced Analytics, and Artificial Intelligence.

By developing projects in the most diverse industries – Banking, Telecommunications, Health, Retail, Energy, Insurance or Aviation - we analyze data, transforming it into knowledge for our clients, allowing them to adopt the best decision-making for their respective organizations and businesses.

We seek a
Senior
Front End
willing to accept new challenges in our Closer team.

We are looking for a
Senior Web Frontend Developer
with 5+ years of experience to join our team and contribute to building innovative, high-quality products.

Tech Stack

• JavaScript, TypeScript
• React, , Redux
• WebSocket, SSE
• REST APIs

Responsibilities

• Develop and maintain scalable, high-performance frontend applications using React, , and Redux.
• Integrate real-time solutions with WebSocket and Server-Sent Events (SSE).
• Build and manage reusable UI components, applying best practices in component-based architecture.
• Implement and optimize
  Server-Driven UI (SDUI)
  patterns to dynamically render frontend from backend-driven schemas.
• Work with
  conversational UI paradigms
  (chat prompts, AI assistant responses, inline feedback, etc.).
• Ensure accessibility compliance and responsive design across all interfaces.
• Collaborate in Agile teams, using tools such as Jira, Git, and CI/CD workflows.

Requirements

• 5+ years of professional experience in frontend development with
  ReactJS, , and Redux
  .
• Proficiency in
  
  and experience integrating
  WebSocket
  or
  SSE
  into frontend workflows.
• Strong understanding of
  component-based architecture
  and proven experience building reusable components.
• Hands-on experience with
  Server-Driven UI (SDUI)
  design patterns.
• Familiarity with
  conversational UI
  and design patterns for assistant-like user experiences.
• Solid knowledge of
  accessibility standards
  and
  responsive design
  .
• Experience working in
  Agile environments
  with modern collaboration and DevOps tools.

If you believe in this match as much as we do, send your CV to and reach the closest side of life.

Closer is a company that values diversity and inclusion. We are committed to fostering an environment where everyone is treated with dignity and respect, regardless of race, gender, beliefs, sexual orientation, physical or mental disability, or other personal characteristics.

MAIN PURPOSE
Richemont is looking for a highly skilled and motivated Lead Developer to initiate, enhance and maintain our New Retail platform. You will play a key role on guiding a team of developer in designing, developing, and maintaining high-quality software solutions with a strong emphasis on PWA/Next/React JS for the frontend and API middleware for the backend with scalable user interfaces for our luxury Maisons.

You will leverage your understanding of composable architectures and modern frontend development principles to build scalable, maintainable, and performant applications.

The ideal candidate will be a strong collaborator, capable of working transversally across different platforms and contributing to the overall success of our technology initiatives.

In this role, you will work on challenging, high-impact projects, collaborating with Software Engineers, Product Analysts and Architects to design and implement cutting-edge front-end solutions. Your expertise will ensure full alignment with Richemont's digital, mobile and web standards, delivering seamless customer experiences.

You will operate in a global, multi-time-zone environment, engaging with teams at different management levels to ensure integration, scalability, and performance across digital platforms.

You will help improve efficiency, code quality, and system architecture while ensuring alignment with Richemont's technology ecosystem.

Key Responsibilities

• Technical Leadership

• Provide technical guidance and mentorship to a team of developers. Implement best practices and coding standards.

• Participate in hiring and onboarding new team members.
• Estimate development effort and track progress.
• Identify and mitigate technical risks.

• Responsable of the technical health of the deliverable.

• Frontend Development:

• Develop and maintain user interfaces using PWA, Next/React JS, ensuring a responsive, accessible, and engaging user experience

• Knowledge of Swift is a plus
• Implement and adhere to the latest frontend development principles and best practices, including component-based architecture, state management, and testing
• Write clean, well-documented, and testable code

• Participate in code reviews to ensure code quality and knowledge sharing

• Middleware Development:

• Design, develop, and maintain API middleware to support frontend functionality and integrate with various backend systems.

• Architecture & Design:

• Contribute to the design and implementation of composable architectures, promoting code reuse, maintainability, and scalability.

• Lead in architectural discussions.
• Lead in code reviews and promote best practices.

• Collaboration & Communication:

• Collaborate effectively with product managers, designers, and other engineers to define, design, and ship new features. ensure seamless integration and alignment.

• Testing & Quality Assurance:

• Track overall and maintain high code quality KPI

• Write unit, integration, and end-to-end tests to ensure the quality and reliability of the software.
• Assist QA Engineers and Test Managers in defining test strategies and automation frameworks.

• Participate in testing and debugging efforts.

• Security and Performance

• Design secured solution following Richemont CyberSec recommendation

• Pro-actively improve security posture
• Lead stress test and load performance
• Monitor production usage and performance of all components.
• Pro-actively identify performance bottlenecks

• Continuous Improvement:

• Stay up-to-date with the latest technologies and trends in software development.

• Identify and implement opportunities to improve the development process and codebase.

Technical Skills
REQUIRED SKILLS & QUALIFICATIONS

• 2+ years of experience as Lead Developer
• 5+ years of experience in Front end development, including design, and implementation: Swift, Next/React, CSS, , npm.
• Solid understanding of frontend development principles and best practices (e.g., responsive design, accessibility, performance optimization).
• IOS/ Hybrid (Cordova/Capacitor) implementation is a plus
• Understanding of composable architectures and microservices.
• Hands-on experience managing website development and delivery.
• Experience with API middleware development.
• Knowledge of Docker-based deployments.
• Proficiency in unit, integration, and system testing methodologies.
• Good understanding of Agile frameworks (eg. Scrum, Kanban, etc.).

Tooling

• , Typescript, HTML, CSS, , Tailwind
• Code Quality & Security: SonarQube, Snyk, Selenium, Insomnia
• Performance, Monitoring: Octoperf, Datadog
• Atlassian Suite (Confluence/Jira)
• , RESTful APIs (Swagger/OpenAPI)

Soft Skills

• Strong team leadership
• Strong problem-solving and analytical skills.
• Excellent communication and ability to work with multinational, cross-functional teams.
• Proactive, self-driven, and eager to explore new technologies.
• Ability to work in a fast-paced Agile environment.

Education & Language

• Bachelor's or Master's degree in Computer Science, Software Engineering, or a related field.
• Fluency in English (French or other languages is a plus).