Senior Design System Lead for FinTech Platforms

Rex; Greater London; On-site; GBP 85,000 - 120,000; Full time

Job summary

Marex is seeking an experienced Product Designer to own and evolve the Marex Design System (MDS) alongside the Lead Product Designer and UI Engineer. The role focuses on tokens, components, theming, accessibility, and governance to deliver a consistent experience across Marex products.

You will collaborate with product teams and engineering to align design and code, drive adoption, and maintain a scalable, self-serve system that supports Marex's broader product strategy.

Qualifications

• 6+ years in product design, including time owning a design system other teams depend on.
• Strong Figma capabilities: variants, variables, component architecture, library publishing, token workflows.
• Comfortable with how systems are implemented in code, ideally MUI or a comparable React library, with a working understanding of React component structure.
• Comfortable using AI tools in day-to-day workflow, and experience designing and writing

Responsibilities

• Own the design system: components, tokens, patterns, documentation and governance.
• Shape the roadmap with the Lead Product Designer based on impact across products.
• Put processes in place where they are missing (contribution, review, versioning, release, deprecation) and run them.
• Spend time with the business to understand who uses MDS and how.
• Work with the product team and development streams to identify shared patterns across products and turn them into system components.
• Keep Figma and code aligned, and plan migrations when they disagree.
• Build components and tokens to a standard engineers can implement directly.
• Work with brand and engineering so the system reflects Marex's identity and what can realistically be built.
• Measure adoption and raise systems thinking across the design team.

Skills

Product design

Design systems

Figma

React

MUI

AI tools

Job description

Marex is seeking an experienced Product Designer to own and evolve the Marex Design System (MDS) alongside the Lead Product Designer and UI Engineer. The role focuses on tokens, components, theming, accessibility, and governance to deliver a consistent experience across Marex products.

You will collaborate with product teams and engineering to align design and code, drive adoption, and maintain a scalable, self-serve system that supports Marex's broader product strategy.