As HealthGrade evolved from a startup tool into a core financial‑health platform serving hundreds of thousands of users, its fragmented UI and unclear health scoring logic limited user trust. What began as a lightweight redesign soon grew into a full‑scale product transformation. As Lead Product Designer, I led the end‑to‑end revamp — defining design principles, re‑architecting the data experience, and creating a scalable system that clarified complex medical data and aligned teams around a shared design language. The redesign directly improved comprehension and retention metrics across the platform.