Demonstrated experience shipping themeable, token-driven UI systems. Expertise in accessibility for low-vision users on small and legacy screens. Practical experience profiling real-world hardware constraints. Hands-on with Figma Tokens or equivalent, CSS variables, Style Dictionary or similar pipelines, and Storybook visual regression. Strong collaboration with engineering for theme switching and runtime theming. Proven ability to partner with product and design peers. Clear, empathetic communication and 'community management' of the system.