Senior Frontend Engineer, Design Systems

Design systems experience. You’ve contributed meaningfully to a centralised design system, shared component library or UI framework, and understand what it takes to design for reuse and future needs.

Front-end engineering strength. You bring strong hands-on experience with React and component-based architecture, and can design, build and review production-quality solutions.

Practical UX fluency. You understand UX methods, accessibility and design intent, and can collaborate effectively with experienced designers without needing to be a product designer yourself.

AI-assisted development experience. You use tools such as Claude Code or equivalent to delegate and complete substantive work as part of your regular engineering workflow.

Judgement over agent-generated output. You can evaluate AI-generated code beyond whether it functions, including component choices, design-token usage, consistency and accessibility.

Systems thinking. You’re energised by creating reusable foundations that improve the quality of many products and teams, rather than solving the same problem one interface at a time.

Collaborative influence. You can explain and negotiate technical standards with both engineers and designers, building support for better ways of working without relying on formal authority.

You’re a frontend or design systems engineer who enjoys operating at the intersection of engineering and UX. You care about the details of a well-made interface, but you’re most energised by building the components, standards and automated guardrails that allow many teams to deliver that quality consistently.

You don’t need to be a senior product designer who codes. We’re looking for an accomplished engineer with genuine UX understanding, curiosity about agentic workflows and the confidence to help shape an emerging practice.

Working at Quantium will allow you to challenge your imagination. You will get to solve complex problems using rigor, precision and by asking great questions – but it also means you can think big, outside the box and push your problem-solving skills to the max.

By joining the Quantium team, you’ll get to:

Forge your path: So many of our team have moved around different teams or offices. You’ll be in the driver’s seat, and we empower you to make your career your own.

Find your kind: Embrace diversity and connect with your tribe (think foodies, dog lovers, readers, or runners).

Make an impact: Leave your mark. Your contributions resonate, regardless of your role or rank.