• Own end-to-end design for the Health Platform across mobile and web: information architecture, flows, wireframes, interactions, visuals, prototypes. • Translate complex health, wearable, and biomarker data into intuitive, trustworthy interfaces that guide user decisions. • Collaborate closely with Product, Engineering, and Data Science to explore ideas, refine solutions, and ship polished features quickly. • Build and maintain a design system that supports clarity, precision, and rapid iteration across multiple surfaces. • Conduct user research and usability testing to validate design decisions and refine product direction. • Ensure every experience supports behavior change — not just information browsing — through clear actions, feedback loops, and motivation design. • Stay ahead of patterns in wearables, quantified self, and AI-driven coaching to maintain a world-class user experience.