Cal Henderson

Programmer, Website Owner

1981 –

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Who is Cal Henderson?

Cal Henderson is a British computer programmer and author based in San Francisco. He was educated at Sharnbrook Upper School and Community College.

He's best known for co-owning and developing the online creative community B3ta with Denise Wilton and Rob Manuel; being the chief software architect for the photo-sharing application Flickr and writing the book Building Scalable Web Sites for O'Reilly Media. He's also worked for EMAP and is responsible for writing City Creator among many other websites, services and desktop applications. Cal is a co-founder and VP engineering of the company Tiny Speck where he works today.

He is color blind, and has worked on applications to make the web more accessible to the color blind. He is also a frequent contributor to open source software projects and runs a number of utility websites, such as Unicodey, to make certain programming tasks easier.

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Jan 17, 1981
Also known as
  • Callum James Henderson-Begg
  • United Kingdom
  • Sharnbrook Upper School and Community College

on July 23, 2013


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"Cal Henderson." STANDS4 LLC, 2022. Web. 29 Nov. 2022. <>.

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