About Me

A software engineer who loves crafting delightful experiences and products. Former staff software engineer at Duolingo and the founder of Readlang.

Blog Posts

• Notepad Calculator Is Now Open Source - Jun 21, 2025
• Readlang: 2023 Year In Review - Dec 21, 2023
• I Bought Back My Acquihired Startup - Mar 23, 2023
• 20 Years Later, And I'm Back To Wearing A Watch - Dec 11, 2022
• Back To Bootstrapping - Apr 5, 2022

…see full list of posts

Projects

• Readlang - A web-app and Chrome extension for learning foreign languages by reading.
• Flashdown - An open source Flashcard app using plain text files which runs on the command line.
• Duolingo Stories - One of Duolingo’s most popular features. I led the project from 2017 to 2019, creating the initial prototype as well as the production implementations on web and iOS.
• Notepad Calculator - An online notepad with calculation support inspired by Soulver. Started in 2015.

…see full list of projects