871 React Developer jobs in Ireland

Our Purpose
Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, we're helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential.
Title And Summary
Lead React Developer

Overview
Mastercard Developers ) is the single platform for Mastercard partners to access a diverse range of payment, data, loyalty, and security APIs. The team is responsible for delivering an experience that ensures developers can quickly find the right API, assess its technical capabilities and integrate it into new and innovative solutions. Mastercard Developers is looking for a versatile and customer-obsessed Software Developer to join our team. You will play a key role in designing and developing next-generation products and services in Mastercard for a global audience.

• Would you enjoy collaborating with your team to design new features and solutions in an evolving Enterprise environment?
• Do you have a strong background in developing and delivering highly intuitive and responsive frontend solutions?
• Are you passionate about delivering high-quality, high-performing and highly extensible software?
• Are you as excited about the value of what you design and build for your customers as you are about the journey to deliver it?
• Do you want to be part of one of the most exciting global initiatives in Mastercard right now?
• Do you value a workplace where diverse opinions and inclusivity are considered important?

Role

• Lead planning, design and implementation of technical solutions for global customers (internal and external).
• Design, build, roll out, and maintain UI components and patterns that will be used with multiple teams.
• Continually ideate, scope, develop, deliver, test and iterate features for the constantly evolving and growing API Platform.
• Contribute to Mastercard Open Source projects.
• Ensure appropriate levels of automation are adopted (build, deploy, configure, validate, monitor).
• Teach and mentor junior engineers and other team members. As an SME on frontend technologies, teams will look up to you for guidance.
• Liaise with other global technology, storage, and operations teams to execute.
• Act as subject matter expert for API Platform and services to support customer integrations on occasion

All About You

• 8+ years professional, hands-on, frontend application development experience.
• Expert React ES6 Javascript and Typescript skills including areas of functional and asynchronous programming.
• Expert CSS development knowledge and experience with both native and using frameworks e.g. bootstrap, tailwind, mui, etc.
• Strong working knowledge of , NPM, Webpack and Jest.
• Knowledge of NextJS, Jamstack (Hugo) is preferred.
• Demonstrable experience in building interactive web applications with polished, good looking, consistent, responsive and accessible UI/UX.
• Proven track record in web application development.
• Strong fundamentals of working with APIs.
• You care about the technical architecture and design - ensuring that the solution is flexibly designed and performs efficiently.
• Experienced working in an Agile environment with a global team that makes frequent production releases.
• Background in Dev/Ops a distinct advantage.
• Background in automation a distinct advantage.

Corporate Security Responsibility
All activities involving access to Mastercard assets, information, and networks comes with an inherent risk to the organization and, therefore, it is expected that every person working for, or on behalf of, Mastercard is responsible for information security and must:

• Abide by Mastercard's security policies and practices;
• Ensure the confidentiality and integrity of the information being accessed;
• Report any suspected information security violation or breach, and
• Complete all periodic mandatory security trainings in accordance with Mastercard's guidelines.

We are seeking a highly skilled and experienced UI Developer to join our dynamic team. The ideal candidate will have a deep expertise in building complex, user-centric web applications using React and related technologies. You will play a critical role in designing, developing, and optimizing front-end applications while ensuring code quality, performance, and scalability.

Key Responsibilities:

• Development of responsive, performant, and user-friendly web applications using React.
• Collaborate with cross-functional teams, including UX/UI designers, back-end developers, and product managers, to translate business requirements into technical solutions.
• Ensure high-quality code through best practices in code reviews, unit testing, and adherence to coding standards.
• Implement and manage CI/CD pipelines to automate testing, integration, and deployment processes.
• Optimize front-end performance and ensure cross-browser compatibility.
• Mentor and provide technical guidance to junior developers.
• Stay up to date with the latest industry trends, tools, and technologies.

Requirements:

• Proven experience 5+ as a UI Developer with a strong focus on React.
• Expertise in JavaScript, TypeScript, HTML5, CSS3, and modern front-end development tools.
• Hands-on experience with state management libraries (e.g., Redux, MobX) and front-end build tools (Webpack, Babel).
• Strong experience with CI/CD pipelines and automated testing frameworks (e.g., Jest, Enzyme, Cypress).
• Familiarity with RESTful APIs, GraphQL, and modern authentication/authorization protocols
• Proficient in Git version control and agile development methodologies.
• Excellent problem-solving skills and attention to detail.
• Strong communication and collaboration skills.

As a Full Stack React Developer Intern, you'll play a key role in the development of Tripjoin's digital platform. You'll work closely with our product and design teams to develop new features, improve performance, and help us scale globally.

This internship is a unique opportunity to gain hands-on experience in a high-growth startup, working with modern technologies and contributing to a product used by real customers.

What you'll do

• Develop and optimize responsive user interfaces using
  
  ,
  
  , and
  Tailwind CSS
  .
• Build and maintain backend services and APIs using
  
  ,
  Express
  , and
  MongoDB
  .
• Collaborate with the product team to implement new features and improve user experience.
• Ensure cross-platform performance, scalability, and clean code architecture.
• Integrate third-party tools (authentication, analytics, payments, etc.).
• Participate in code reviews, debugging, and version control through
  Git/GitHub
  .
• Contribute ideas to improve product design, data structure, and performance.

What we're looking for

• Studying or recently graduated in Computer Science, Engineering, or related fields.
• Strong knowledge of
  JavaScript
  ,
  
  , and modern front-end development practices.
• Basic understanding of
  
  ,
  Express
  , and
  MongoDB
  (or other databases).
• Familiarity with REST APIs and responsive design principles.
• Eagerness to learn, attention to detail, and a proactive mindset.
• Team player with great communication skills and startup spirit.

What we offer

• Real startup experience — you'll work on an actual live product.
• Mentorship and learning opportunities from experienced founders.
• Flexible working hours and remote-friendly culture.
• Chance to contribute to a product that connects people through unique travel experiences.
• A dynamic, young, and collaborative environment where your ideas matter.

K&K Social Resources & Development GmbH
is an international recruiting agency that has been providing technical resources in the European region since 1993. This position is with one of our clients in Ireland,
who is actively hiring candidates to expand their teams.

Job Role: React native Developer

Location: BDublin, Ireland

Employment Type: Contract

Technology – React native, Javascript, CSS, HTML

Description:

Mandatory Skills:

• React Native
  (Core development and debugging)
• JavaScript, HTML, CSS
• DevOps understanding
  (CI/CD pipelines, release processes)
• Azure B2C
  configuration and integration
• App deployment
  experience on iOS and Android
• Backend integration
  (REST APIs, authentication, data exchange)
• Azure configuration and management
• Accessibility Standards (WCAG)
  compliance knowledge
• API Management
  (Azure API Management or equivalent)
• Experience with open-source libraries

Good to Have:

• Knowledge of
  TypeScript
• Experience with
  React Hooks and Redux
• Familiarity with
  Firebase
  or
  GraphQL
• Basic understanding of
  Agile/Scrum methodologies

Note: Applicants for employment in Ireland
should possess work authorization which does not require sponsorship by the employer for a visa.

NUACOM is an Irish company established in 2009 and quickly became a leader in Unified Communication services (UCaaS). The vision of the company is to leverage the latest technologies to build amazing live communication tools for businesses around the world.

We are looking for a Senior React Application Developer with deep expertise in ReactJS and React Native to join our growing development team. You will play a key role in building and maintaining both our web and mobile applications, ensuring top-quality user experiences and performance.

Key Responsibilities

• Design, develop, and maintain modern, scalable front-end applications using ReactJS and React Native.
• Collaborate with UX/UI designers, product managers, and backend developers to deliver seamless features across web and mobile platforms.
• Write clean, maintainable, and reusable code with a focus on performance and scalability.
• Implement state management solutions (e.g., Redux).
• Ensure code quality through unit testing, integration testing, and automated testing practices.
• Participate in CI/CD pipelines and contribute to code reviews, debugging, and performance tuning.
• Maintain high standards of security, accessibility, and responsive design.
• Stay up-to-date with the latest front-end and mobile development best practices.

Requirements

• 5+ years of professional experience in front-end development.
• Strong proficiency in JavaScript (ES6+), CSS3, and HTML5.
• Expertise in ReactJS, Redux, and TypeScript.
• Strong experience with React Native for mobile application development.
• Familiarity with CI/CD pipelines, testing tools, monitoring, and debugging practices.
• Solid understanding of version control systems, preferably Git.
• Proven experience with unit testing, integration testing, and code coverage.

Nice to Have

• Experience working with WebRTC applications.
• Familiarity with AWS services such as EC2, S3, CloudFront, and ECS.
• Broader mobile app development experience beyond React Native
• Experience with native Android IOS development

What We Offer

• Competitive salary package.
• Opportunity to work on innovative, high-impact projects.
• Flexible work environment with potential for remote work.
• Career development and learning opportunities.
• A collaborative and supportive team culture.

Job Types: Full-time, Permanent

Benefits:

• Additional leave
• Bike to work scheme
• Company events
• Employee assistance program
• Flexitime
• On-site parking
• Private medical insurance
• Sick pay

Work Location: Hybrid remote in Co. Kildare, CO. Kildare

About Us

Tripjoin
is an innovative travel-tech startup transforming the way people experience group travel. Our mission is to make traveling more
social, authentic, and accessible
by connecting people through unique shared journeys. We combine our own curated trips with a
C2C marketplace
, empowering creators and communities to design and launch their own travel experiences. With Tripjoin, group travel becomes a
scalable global ecosystem
, fueled by technology, creativity, and community.

Role – Fullstack Developer (React & )

As a
Fullstack Developer at Tripjoin
, you will play a key role in designing, developing, and maintaining our platform. You will work across the entire technology stack, from building responsive
frontend applications in
to architecting scalable
backend services in
, ensuring a seamless and engaging experience for our users.

Key Responsibilities:

• Frontend Development
  : Design, implement, and optimize dynamic and responsive UIs with
  
  and related libraries.
• Backend Development
  : Build robust APIs and backend services using
  , Express
  , and cloud-based solutions.
• Database Management
  : Design and optimize data models with
  MongoDB (or SQL)
  , ensuring reliability and scalability.
• System Architecture
  : Collaborate in designing scalable, maintainable, and secure system architectures.
• Integration
  : Implement and manage third-party API integrations (payments, authentication, travel services).
• Testing & Debugging
  : Write unit/integration tests, troubleshoot issues, and ensure high-quality code.
• Collaboration
  : Work closely with product, design, and marketing teams in an
  agile environment
  , participating in sprint planning and code reviews.
• Optimization
  : Continuously improve performance, scalability, and user experience across the platform.

What We Offer:

• A chance to
  shape the core technology
  of a growing travel-tech startup.
• Real impact: your code will directly influence how thousands of users experience travel.
• Exposure to
  modern tools and workflows
  : Git, CI/CD pipelines, cloud hosting, and Agile methodology.
• A collaborative environment where
  creativity, ownership, and innovation
  are valued.
• Opportunity for rapid professional growth as Tripjoin scales globally.

About the Role

We're seeking a skilled React Native Mobile Developer to build and maintain high-quality mobile apps for iOS and Android. You'll work closely with designers and stakeholders to deliver seamless, user-friendly experiences.

Key Responsibilities

• Develop and maintain cross-platform apps using React Native
• Collaborate on UI/UX with designers and stakeholders
• Integrate APIs, third-party services, and SDKs
• Write clean, testable code and maintain documentation
• Participate in Agile ceremonies and code reviews
• Ensure app performance, security, and quality through testing and optimisation

Requirements

• 3+ years of React Native experience
• Strong knowledge of iOS (Swift/Obj-C) and Android (Java/Kotlin)
• Experience publishing apps to App Store and Play Store
• Proficient with REST, GraphQL, Redux/Context API
• Familiar with CI/CD, Git workflows, and Agile practices
• JavaScript/TypeScript expertise
• Experience with testing tools (Jest, Detox) and analytics/crash reporting

What you need to do now

If you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call us now.

If this job isn't quite right for you, but you are looking for a new position, please contact us for a confidential discussion about your career.

Hays Ireland is a trading division of Hays Specialist Recruitment (Ireland) Limited and acts as an employment agency for permanent recruitment and employment business for the supply of temporary workers. By applying for this job you accept the T&C's, Privacy Policy and Disclaimers which can be found

About Tripjoin

Tripjoin is a fast-growing startup reshaping how people travel. We are building the first
global marketplace for group trips
, empowering creators and communities to organize unique experiences while making it easy for travelers to join them. With +85,000 followers on social media and dozens of successful trips already organized, we are now scaling our platform internationally.

Role Overview

We are looking for a
Fullstack Developer Intern (React + + MongoDB)
eager to learn and grow in a dynamic startup environment. You will help us improve our marketplace platform by developing new features, optimizing performance, and collaborating closely with the founding team.

Responsibilities

• Build and maintain web features using
  React +
  on the frontend.
• Develop and optimize APIs and back-end services using
  + Express
  .
• Work with
  MongoDB
  to design and manage scalable databases.
• Implement key platform integrations (bookings, payments, user management).
• Collaborate with product, design, and marketing teams to ship impactful features.
• Contribute to testing, debugging, and platform performance improvements.

Requirements

• Currently pursuing or recently graduated in Computer Science, Software Engineering, or related fields.
• Solid knowledge of
  JavaScript/TypeScript
  .
• Experience with
  React
  is a plus).
• Familiarity with
  
  and
  Express
  .
• Basic understanding of
  MongoDB
  or other databases.
• Comfortable with Git/GitHub.
• Proactive mindset and interest in working in a startup.

Nice to Have

• Knowledge of authentication (JWT, OAuth).
• Experience with cloud hosting (AWS, GCP, or similar).
• Interest in travel, marketplaces, or community-driven platforms.

What We Offer

• A hands-on role where your code impacts real users from day one.
• Direct mentorship from the founding team.
• Flexible hours and remote-friendly setup.
• The chance to shape a global travel startup at an early stage.
• Possibility to transition into a full-time role.

About Us

Tripjoin
is a travel-tech startup redefining the way people experience group travel. Our mission is to make traveling more
social, authentic, and accessible
by connecting people through unique shared journeys. We combine curated in-house trips with a
C2C marketplace
, empowering creators and communities to design and launch their own experiences. With Tripjoin, group travel evolves into a
scalable global ecosystem
powered by technology, creativity, and community.

Role – Fullstack Developer Intern (React & )

As a
Fullstack Developer Intern at Tripjoin
, you will gain hands-on experience in a fast-paced startup environment. You will collaborate directly with the product and tech team, contributing to both the
frontend )
and
backend )
of our platform. This role is ideal for someone eager to learn modern web development practices while working on a live product used by real users.

Key Responsibilities:

• Frontend Development
  : Assist in building responsive and user-friendly interfaces with
  
  .
• Backend Development
  : Support the development of APIs and services with
  & Express
  .
• Database Management
  : Learn and contribute to database operations with
  MongoDB (and other databases)
  .
• System Integration
  : Help integrate third-party APIs and external services into the platform.
• Testing & Debugging
  : Participate in identifying bugs, testing features, and ensuring platform stability.
• Collaboration
  : Work in an agile setup, attending sprint planning, code reviews, and feature discussions.
• Optimization
  : Contribute ideas to improve performance, scalability, and user experience.

What You'll Gain:

• Practical experience in
  fullstack web development
  with and
• Exposure to
  modern development workflows
  (Git, Agile, CI/CD).
• The chance to work on a
  real startup product
  impacting global travelers.
• Mentorship and guidance from the founding and product teams.
• A dynamic environment where your contributions have a
  direct impact
  on product growth.