The Role

An award-winning trading and data infrastructure company is hiring a UI Engineer in Belfast. You'll design, build, and test highly performant front-ends using modern TypeScript, React, and Next.js in a collaborative Agile environment.

You'll work closely with cross-functional teams - designers, QAs, BAs, and back-end developers - to build user interfaces that solve real business problems at scale. Strong attention to detail, TDD skills, and a passion for quality user experiences are key.

Why Apply?

• Negotiable salaries
• Bonus
• Hybrid working - 3 days onsite
• Private healthcare, life assurance, digital GP
• Genuine technical ownership on high-value UI work

What You\'ll Do

• Build and maintain web UIs with TypeScript, React, and Next.js
• Use contract-first and test-first approaches (integration & unit tests)
• Work with Figma to wireframe and prototype interfaces
• Contribute to a mono-repo setup (NX / yarn workspaces)
• Collaborate across disciplines to refine features and improve UX
• Support an Agile, quality-first delivery culture
• Document components, decisions, and workflows

Your Skills & Experience

Must-Have:

• 3+ years\' commercial experience building web apps
• Strong React functional component knowledge
• Solid experience with integration/unit testing for UI
• Comfortable with Figma or similar wireframing tools
• Knowledge of contract-first or API-driven UI design
• Agile mindset and ability to work across the SDLC
• Familiarity with mono-repo tooling (NX, Yarn workspaces)

Nice-to-Have:

• Next.js or isomorphic framework experience
• Understanding of UX/accessibility principles
• Knowledge of AWS
• Strong TypeScript/JavaScript and good CSS fundamentals
• Comfortable using Git and JIRA
• Collaborative, T-shaped engineer who supports others\' growth

Why This Team?

You\'ll be working with sharp engineers in a high-performing Agile team, building UIs that power global markets. The code you ship makes a real-world difference - and you\'ll have the space and support to do it right.