March 2025 – Delivered foundational user authentication flow for the uthealth app, establishing a scalable onboarding experience and robust navigation structure. Key changes include a native stack navigator with Sign In, Create Account, Date of Birth, Weight, and Height screens, with header hidden and a consistent white background. Onboarding navigation was streamlined by adjusting the initial route and parameter types and by cleaning up legacy code. These changes reduce onboarding friction, improve data capture during sign-up, and set the stage for future authentication enhancements. Tech and coding practices demonstrated include React Navigation, native stack patterns, type-safe parameter passing, and code cleanup for maintainability.