Cal Henderson

Cal Henderson is the co-founder and CTO of 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 Bachelor of Computer Science 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 ran for over 15 years. Cal now resides in San Francisco.

Cal Henderson is the Co-Founder and CTO at Slack, based in United States, North America. With a background in Collaboration, Cal Henderson has a rich history of leadership and innovation. Cal Henderson studied BS Software Engineering @ Birmingham City University. Explore their detailed professional journey, key connections, and contributions to the industry on our platform.