iOS Engineer, Lead iOS Engineer at Vexel - Crypto Wallet

Co-owned a unified UIKit design system; built custom non-native UI solutions for complex flows beyond stock UI Kit; instrumented cold/warm starts and rendered KPIs; optimized rendering via multithreading; authored a modernization roadmap for a 10-year legacy ads layer; led onboarding and introduced living docs and coding style guidelines; modularized the app to simplify development and reduce build times; collaborated with tests, analytics, AB tests, and CI/CD to ensure safe releases with measurable impact; oversaw App Store publishing.