Severin Hacker.

I am the co-founder and CTO of Duolingo. Before Duolingo, I studied computer science and graduated from Carnegie Mellon University with a PhD. Before CMU, I studied at ETH Z├╝rich, majoring in computer science. I grew up in Switzerland, and yes, my last name is real. You can find me on Twitter and LinkedIn.

I also invest in early-stage tech startups in Pittsburgh. My criteria for investment are: a good idea, a great team and a minimum viable product. My current investments include IAM Robotics (2018), ViaHero (2017), Brainbase (2017), Gridwise (2016) and Abililife (2016). If you believe you have what it takes, send me an email: angel at I organize a small monthly angel meetup in Pittsburgh. If you are an active angel investor and would like to join, send me an email.