Karin Tsai, 27, is a software engineer at Duolingo in Pittsburgh Q. What is Duolingo and what do you do there? A. We’re a free language-learning platform. We earn revenue by charging for language certification tests for individuals and businesses. Currently I code our new flashcard app, which we call Tinycards, and that part of our website. What is your background? My parents are from Taiwan; I’m a first-generation American. My dad is a mechanical engineer. As a kid, I would play educational computer ga
