Engineered a swipeable card stack component in Kotlin/XML for the main dashboard serving 50M+ monthly active users, delivering a +0.13% lift in Retained Monthly Members. Architected a GraphQL to MVVM data pipeline and launched a previously iOS-exclusive feature on Android with an estimated $2M+ ARR impact.

Engineered an open-source healthcare predictive analysis platform using React, AWS, and SageMaker. Architected 10+ RESTful APIs with API Gateway and Lambda, and optimized an S3-based data archiving solution, reducing long-term storage costs by ~30%.

Responsibilities include product sourcing, inventory management, listing optimization, and customer service.