Design System Designer (UI/UX)

TL;DR

Design System Designer (UI/UX): Creating and governing a scalable design system across Web, iOS, and Android with an accent on UI craft and systems thinking. Focus on defining design tokens, ensuring platform consistency, and integrating AI tools to enhance scalability and efficiency.

Location: Office in Roppongi, Tokyo

Company

A global marketplace app focused on circulating all forms of value to unleash human potential through technology.

What you will do

• Design, refine, and maintain reusable UI components, patterns, and guidelines for the design system.
• Define and evolve design tokens, including spacing, color, and typography.
• Ensure platform consistency across Web, iOS, and Android.
• Collaborate closely with engineers to ensure accurate component implementation and parity between design and code.
• Create and maintain clear documentation, usage guidelines, and change-management processes.
• Explore and experiment with AI tools to accelerate component design, audits, and documentation.

Requirements

• 5+ years of experience in product design, UI/UX, or a design system-focused role.
• Deep expertise in Figma, including variants, Auto Layout, tokens, and libraries.
• Strong understanding of accessibility, responsive design, and multi-platform workflows.
• English: B2 level required.
• Strong portfolio demonstrating systems thinking, component design, and visual craft.

Nice to have

• Experience building multi-brand or multi-platform design systems.
• Practical experience leveraging AI tools to improve design efficiency.
• Japanese: A2 level.

Culture & Benefits

• Work environment with Full Flextime (no core time).
• Culture rooted in growing together and solving challenges through mechanisms.
• Strong commitment to Inclusion & Diversity.

Hiring process

• Application screening and potential skill assessment.
• Multiple interviews depending on the position.
• Final offer based on interview results and reference checks.