Senior React Developer

Ardanis Technologies Limited is a software and technology consultancy that focuses on delivering tailored solutions to organizations in the UK and Ireland, helping them grow and innovate since 2016.

Ardanis

Employee count: 51-200

Portugal only

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We are looking for a Senior React Developer to join our growing frontend team. You’ll be responsible for designing, developing, and maintaining high-quality web applications using React.js and modern JavaScript technologies. You will work closely with UX/UI designers, backend engineers, and product managers to deliver scalable and performant solutions that provide an excellent user experience.

Responsibilities:

Design and implement responsive, maintainable, and reusable front-end components using React.js and TypeScript.
Collaborate with cross-functional teams to define, design, and ship new features.
Ensure the technical feasibility of UI/UX designs and maintain a consistent design system.
Optimize applications for maximum speed and scalability.
Implement state management solutions (e.g., Redux, Zustand, or Recoil).
Write clean, well-documented, and testable code following best practices and coding standards.
Participate in code reviews, provide mentorship to junior developers, and contribute to architectural decisions.
Integrate frontend applications with RESTful APIs or GraphQL services.
Stay up to date with the latest frontend technologies, trends, and tools.

Requirements

5+ years of professional experience in frontend development, with at least 3 years using React.js.
Strong proficiency in JavaScript (ES6+) and TypeScript.
Experience with React Hooks, Context API, and functional components.
Solid understanding of HTML5, CSS3, and modern CSS frameworks (Tailwind, Styled Components, etc.).
Familiarity with state management libraries (Redux, Zustand, MobX, or similar).
Experience working with RESTful APIs or GraphQL.
Understanding of frontend architecture, performance optimization, and testing frameworks (Jest, React Testing Library, Cypress).
Knowledge of Git, CI/CD pipelines, and agile development processes.
Excellent communication and problem-solving skills.
Fluent in English, both written and spoken.

Nice to Have

Experience with Next.js or React Native.
Familiarity with Docker, Kubernetes, or cloud environments (AWS, Azure, GCP).
Background in UI/UX or design systems.
Contributions to open-source projects or a portfolio on GitHub.

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About the job

Apply before

Jan 08, 2026

Posted on

Nov 09, 2025

Job type

Full Time

Experience level

Senior

Location requirements

Portugal

Hiring timezones

Portugal +/- 0 hours

About Ardanis

Learn more about Ardanis and their company culture.

View company profile

Ardanis Technologies Limited is a leading software and technology consultancy based in Dublin, Ireland. We are dedicated to delivering innovative software solutions to digital organizations primarily in the UK and Ireland. Since our founding in 2016, we have built a strong reputation for providing tailored solutions that cater to the unique needs of each client. Our approach is centered around collaboration and agility, ensuring that we work closely with our clients to create effective digital solutions that evolve with their business requirements.

The Ardanis team is composed of highly skilled professionals, including developers, technologists, architects, project managers, and designers. Our diverse expertise enables us to leverage a broad range of technologies and platform expertise, including JavaScript, AngularJS, Microsoft.NET, and Ruby, to develop high-quality software solutions. Whether through IT consultancy, developing resource teams, or outsourcing, Ardanis champions a client-centric approach that aims to drive genuine business growth through innovation and next-generation AI solutions.