Cal Henderson
Angel investor; Slack co-founder and former CTO
Cal co-founded Slack and led its engineering, research and design teams as CTO. He previously built and led engineering at Flickr, and now advises and invests in software founders.
Experience at a glance
| Organisation | Role or background |
|---|---|
| Slack | Co-founder & former CTO |
| Flickr | Engineering lead |
| O’Reilly Media | Book author (2006) |
Led Slack’s technology from inception through IPO and acquisition.
The experience behind the profile
Cal led engineering, research and design at Slack. Before Slack, he built and led Flickr’s engineering organisation through its acquisition by Yahoo. He also authored Building Scalable Web Sites, published by O’Reilly in 2006. His public biography says he now advises and invests in software leaders.
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Public sources
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