Principal UI Interaction Designer

Role Overview:

• Lead the UI strategy, interaction design, and design system foundations for our next-generation native mobile app.
• Define the standards for best-in-class mobile design.
• Establish the interaction models and principles that guide our product design teams.

What you’ll be doing:

• Define and document mobile UI principles, interaction guidelines, motion patterns, and design philosophies that anchor the product.
• Architect robust mobile design system-components, patterns, tokens, interaction models-and partner with engineering to ensure scalable implementation.
• Create refined UI screens, flows, and prototypes with exceptional attention to detail, craftsmanship, and platform-specific conventions.

What you will need to be successful:

• 8+ years designing high-quality mobile applications with a strong portfolio demonstrating UI craft, interaction patterns, animations, and systems thinking.
• Experience building or leading major contributions to a design system.
• Strong command of user flows, interaction states, motion principles, progressive disclosure, error handling, and edge-case design.

Bonus Experience:

• Experience working in fintech, healthtech, payments, benefits, or other regulated domains.
• Experience shipping mobile products at scale (millions of users).
• Background contributing to or running design system governance models.