I'm an entrepreneur, designer & technologist. I see the internet at its most significant as a medium for human communication and interaction.

I'm the founder & CEO of Slack. Prior, I founded Ludicorp (Latin, roughly, for "body of play") with the mission of creating new possibilities for communication and expression through play. Ended up with Flickr instead, but that worked too :)

Specialties: Product, software and interaction design; user experience; research; design and development management; online community development; philosophy; deal-making; deep thought; music making; humor.