The core technical achievement was designing a seamless, human-centric frontend onboarding flow that secretly functions as a dynamic system-prompt generator for the AI backend—translating user intent into strict execution constraints. Beyond the AI architecture, I managed the complete end-to-end iOS deployment pipeline. This included configuring Firebase Authentication for native Apple Sign-In compliance, successfully navigating and resolving Apple's strict App Store Review guidelines (specifically Guideline 2.1(a) and complex data privacy requirements), and optimizing the App Store Connect metadata for marketplace visibility.