Frontend_React Developer

Test Triangle • JavaScript • TypeScript • 2 days ago
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In office (Sheffield)
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Confirmed on the employer's own hiring board on Oct 12, 2026. First seen by Alion on Oct 10, 2026.

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Test Triangle

Test Triangle is a Dublin-headquartered technology services company providing IT service management consulting as an Atlassian, ServiceNow and Freshworks partner, along with software testing, cloud, digital transformation and recruitment outsourcing services. Operating since 2012 from Blanchardstown Corporate Park, it serves organisations across Ireland, the UK and further afield and supplies contract and permanent specialists to client organisations such as UK banks. Its postings are mainly client placements for data analysts, DevOps and platform engineers, cyber security specialists, solution architects, project managers and mobile developers in Dublin, London and other cities.
testtriangle.com • HQ: Dublin, Ireland • IT Service & Asset Management • Information Technology • Professional Services • 1001-5000 employees • Est. 2012

Role Overview

We areseekinga highly skilledReact Developer with strong UX Designexpertiseto design and build intuitive, scalable, and user-centric web applications. The ideal candidate should have hands-on experience in React development and a deep understanding of user experience principles, wireframing, prototyping, accessibility, and responsive design.

The candidate will collaborate closely with Product Owners, Business Analysts, UX Designers, and Engineering teams to transform business requirements into engaging digital experiences.

Key Responsibilities

React Development

  • Develop modern, responsive web applications using React.js.

  • Build reusable UI components and front-end libraries.

  • Implement state management using Redux, Context API, or equivalent frameworks.

  • Integrate REST APIs and backend services.

  • Optimizeapplications for performance, scalability, and security.

  • Participate in code reviews, testing, and CI/CD deployment activities.

UX Design

  • Create user journeys, wireframes,mockups, and interactive prototypes.

  • Conduct user research and usability analysis.

  • Design intuitive experiences aligned with business goals.

  • Develop andmaintaindesign systems andcomponentlibraries.

  • Ensure compliance with accessibility standards (WCAG).

  • Collaborate with stakeholders tovalidatedesign concepts and improve user satisfaction.

Collaboration

  • Work closely with product teams to translate requirements into user-friendly solutions.

  • Partner with developers to ensure design feasibility and consistency.

  • Contribute to Agile ceremonies, sprint planning, and estimation activities.

Mandatory Skills

React Development

  • React.js

  • JavaScript (ES6+)

  • TypeScript

  • HTML5

  • CSS3 / SCSS

  • Redux / Context API

  • REST API Integration

  • Responsive Web Design

UX Design

  • Figma

  • Wireframing & Prototyping

  • User Research

  • User Journey Mapping

  • Interaction Design

  • Design Systems

  • Accessibility (WCAG)

Good to Have Skills

  • Next.js

  • React Query

  • Material UI / Tailwind CSS

  • Adobe XD / Sketch

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