I am the Co-founder & CTO at Slack, a platform for modern team communication, in San Francisco, California. Previously, Co-founder and VP Eng for Glitch, a web-based massively multiplayer game. Before that, the Director of Engineering for Flickr at Ludicorp and then Yahoo! Back in the UK, I was the technical director of Special Web Projects at Emap, a UK media company and co-created the creative community B3TA. In 2006 I wrote the best selling book Building Scalable Websites.