Architected a secure, flagship banking-grade application for 50K+ users using Kotlin, Dagger2, and Room, achieving a 99.9% crash-free rate through Domain-Driven Design (DDD) and strict modularization. Optimized onboarding flows by collaborating with Product and Design teams to implement Clean Architecture (MVVM & MVI), resulting in reduced user drop-off and enhanced conversion rates. Optimized complex data flows and asynchronous operations by utilizing Kotlin Coroutines and RxJava 2, improving app responsiveness and smoother payment processing transitions. Streamlined release cycles by building automated CI/CD pipelines and a comprehensive testing suite (Unit/Integration), reducing deployment time by 20% while maintaining high observability.

Senior Software Engineer at Samsung Research & Development

June 1, 2019 - October 1, 2024

WearOS development for Samsung Galaxy Watch Series (Watch4-Watch7). Engineered system-level services for millions of global devices, delivering a 10x improvement in stability and a 90% reduction in customer-reported incidents through rigorous performance profiling and optimization. Boosted system responsiveness by 30% through deep-dive debugging and hardware-software integration for WearOS and Android platforms, ensuring smooth UI performance across diverse hardware. Spearheaded the transition from Java to Kotlin for core system libraries, significantly enhancing developer productivity and reducing memory overhead using Coroutines and Flow. Partnered with cross-functional leads across global offices to deliver integrated, high-quality software within an Agile Scrum framework, facilitating synchronized releases across multiple time zones.