Cal Henderson
Founder at Slack Technologies (Venture Capital)
Profile
Cal Henderson is the co-founder and CTO of Slack.
He oversees Slack’s world-class engineering team and sets the technical vision for the company.
In 2019, he was named a Fortune 40 Under 40 honouree and was recognised by the World Economic Forum as a Young Global Leader.
Previously, Cal built and led the engineering teams at Flickr, through its acquisition by Yahoo!.
An experienced technology leader and a popular speaker on engineering scalability, he authored the best-selling O’Reilly Media book Building Scalable Websites.
Cal was also 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 was involved in London’s early online network through his work with digital creative communities and the blogosphere.
He has a BSc in Computer Science and has received an Honorary Doctorate from Birmingham City University.
He now resides in San Francisco.
Cal Henderson active positions
| Companies | Position | Start |
|---|---|---|
Slack Technologies (Venture Capital)
 Slack Technologies (Venture Capital) Investment ManagersFinance Slack Technologies LLC (Slack Technologies) is a venture capital firm founded in 2009. The firm is headquartered in San Francisco, California. | Founder | 2009-03-31 |
Former positions of Cal Henderson
| Companies | Position | End |
|---|---|---|
| Flickr, Inc. | Corporate Officer/Principal | 2009-03-31 |
Emap Australia
 Emap Australia Publishing: Books/MagazinesConsumer Services Part of Are Media Pty Ltd., Emap Australia is an Australian company that engages in publishing services. The company is based in Sydney, Australia. Emap Australia was acquired by Are Media Pty Ltd. from Ascential Group Ltd. on September 12, 2007 for $77.99 million. | Director/Board Member | 2004-01-31 |
Training of Cal Henderson
| Birmingham City University | Graduate Degree |
Experiences
Positions held
Connections
1st degree connections
1st degree companies
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Female
Members of the board
Executives
Linked companies
| Private companies | 3 |
|---|---|
Emap Australia
Emap Australia Publishing: Books/MagazinesConsumer Services Part of Are Media Pty Ltd., Emap Australia is an Australian company that engages in publishing services. The company is based in Sydney, Australia. Emap Australia was acquired by Are Media Pty Ltd. from Ascential Group Ltd. on September 12, 2007 for $77.99 million. | Consumer Services |
Slack Technologies (Venture Capital)
Slack Technologies (Venture Capital) Investment ManagersFinance Slack Technologies LLC (Slack Technologies) is a venture capital firm founded in 2009. The firm is headquartered in San Francisco, California. | Finance |
| Flickr, Inc. |
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