Ei-Nyung Choi is building user-centered technology professionally for 20 years. Her specialties are in high-performance/ high-scale web products, mobile apps, and casual games. She’s worked in nimble startups and large corporations as everything from IC to Founder, and wants to create happy users while leading collaborative, cross-functional teams that develop features end-to-end. She has 13 years of mobile engineering under her belt, having worked on Windows, Symbian, and Palm platforms before developing her iOS expertise. She’s shipped a major product on Android as the sole developer. She also has 13 years of experience in building complex services built on web technologies. A lot of her experience is in hybrid mobile development, but she is comfortable anywhere where she is making great products for users. She’s managed teams, designed pipelines, built products from scratch, and has always been proud that the products she’s worked on have been best-in-class.