Login

Cal Henderson

Co-Founder & CTO at Slack

Cal Henderson oversees the engineering organization at Slack. He is an experienced technology leader, having previously built and led the engineering team at Flickr, through its acquisition by Yahoo. As a popular speaker on engineering scalability, he authored the best-selling O’Reilly Media book Building Scalable Websites. He was a pioneer in the use of web APIs, and created the basis for OAuth and oEmbed, now used by YouTube, Twitter, and many others. Cal has a BCS from the University of Central England, and was involved in London’s early online community through his work with the early digital community B3ta and his personal blog iamcal.com, which he has run for over 15 years. Cal now resides in San Francisco.
Related people
Kevin Scott
Parker Harris
Abhay Parasnis
Chris Wright
Tim Tully
David Clarke
Colleen Berube
Richard Farley
Brian A. Hoyt
Ott Kaukver
Chris Bedi
By clicking "Continue" or continuing to use our site, you acknowledge that you accept our Privacy Policy and Terms of Use. We also use cookies to provide you with the best possible experience on our website.