Hi, I'm David Klionsky.

I'm a software engineer with a passion for education, AI, and building apps that people love.

I'm currently working on PlayScout, an app for helping families find great playgrounds.

Previously, I was employee #12 at Duolingo, where I was the sole engineer who built Duolingo for iOS.

I started and led the team that made Tinycards, Duolingo's first educational app outside of language learning and one of Apple's Top 10 Apps of 2016.

I also built and co-led Duolingo ABC, making early literacy accessible to families everywhere.