I am the Co-founder & CTO at Slack, a new platform for 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. I promise I'm working on a second edition.

CTO @ From April 2009 to Present (6 years 7 months) San Francisco, CADirector of Engineering @ From June 2005 to April 2009 (3 years 11 months) Director of Web Development @ From December 2003 to June 2005 (1 year 7 months) Owner @ From January 2003 to April 2005 (2 years 4 months) Technical Director @ From August 2001 to February 2004 (2 years 7 months) Lead Programmer @ From June 2000 to August 2001 (1 year 3 months) Lead Programmer @ From September 1999 to June 2000 (10 months)

BSc @ University of Central England From 1999 to 2002 Sharnbook Upper School From 1995 to 1999 Cal Henderson is skilled in: CMS, JavaScript, Flash, APIs, Mobile Applications, jQuery, PHP, MySQL, Web Applications, HTML 5, Web Development, Scalability, Subversion, User Experience, Programming, Software Development, CSS, HTML, Web Services, Ruby, ActionScript, Scrum, Front-end, Apache, Git, OOP