IT & Software

Senior UI Engineer

MCS Group

Belfast City District · Northern Ireland · United Kingdom

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Salary: $59 – $72 per year

Senior UI Engineer

  • Belfast

  • Permanent

Belfast - Hybrid (2 days per week in office)

Salary up to £65,000

The Opportunity

MCS Group is delighted to be partnering with an established global software company as they seek to appoint a Senior UI Engineer to join their Belfast-based engineering team.

This is a fantastic opportunity to join a newly formed team working on a greenfield product within the cybersecurity space. With the product still in its early stages, you'll have a genuine opportunity to influence technical decisions, architecture and the overall direction of development.

You'll be joining a collaborative engineering environment that encourages new ideas, technical ownership and autonomy, with the opportunity to make a real impact on a business-critical product.

The Role:

As a Senior UI Engineer, you'll play a key role in taking a new product from proof of concept through to a fully developed, production-ready solution. Working closely with backend engineers, designers and product stakeholders, you'll be responsible for building intuitive, responsive and high-performing user interfaces.

You'll have the freedom to contribute to technology choices, shape frontend architecture and establish best practices, while working within a relaxed and supportive engineering culture.

Key Requirements:

  • 5+ years' experience with JavaScript / TypeScript

  • 3+ years' commercial experience with React

  • Experience with modern component libraries such as React Aria, Radix UI or similar

  • Strong understanding of UX principles, responsive design and accessibility

This is an excellent opportunity for a Senior Frontend Engineer who enjoys taking ownership, contributing ideas and having a real say in how products are built. You'll be joining a talented engineering team with a relaxed working culture, flexible working arrangements and a competitive benefits package.

We are committed to providing reasonable accommodation to individuals with disabilities throughout the recruitment process. Please let us know if you require any adjustments.

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Reference: WJ-766_24114294 · Posted 09 Nov 2026, 09:52 PM

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