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About [ on iamcal.com ]

About Cal Henderson


Cal Henderson is the Co-founder and CTO of Slack. He has been working as a web applications developer for more than 15 years.

Slack was previously Tiny Speck, creators of the massively multiplayer online game Glitch. Prior to his work at Tiny Speck, Cal was Flickr's Director of Engineering at Yahoo!. He was an inaugural member of the groundbreaking photo-sharing site, working alongside Flickr co-founder Stewart Butterfield, the now CEO and Co-Founder of Slack.

In 2006, Cal wrote the best-selling book Building Scalable Websites, and is currently working on a second edition. In his spare time he continues to publish articles on web application development and contribute to open source projects.

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About iamcal.com

iamcal.com has been online for 16 years, 105 days, 17 hours, 37 minutes and 7 seconds - crumbs!

iamcal.com is primarily cal henderson's personal site, containing his linklog/weblog which he's been posting to regularly since June 2000:

It also hosts a discussion forum where anyone can signup and post. The topic is roughly "whatever". more »

An incomplete list of other sites that Cal has created or been involved with can be found on the network homepage.


Your Email:


(or mail me at )

Cell Phone: +1 415-373-8825

ICQ: 43903925
AIM: iamcal2
Yahoo: iamcal2000
MSN: cal_henderson@hotmail.com
Skype: iamcal
Jabber: iamcal@gmail.com

I moved to San Francisco in 2005, so don't try to contact me in England. My home address is:

Cal Henderson
785 Oak Street
San Francisco, CA, 94117

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