I am a self-employed software consultant/developer based in Helsinki, Finland. Currently, my most notable professional activity is developing code in and around the markup parsers in Firefox as a consultant for the Mozilla Corporation. I also maintain an HTML5 validator. I participate in the HTML Working Group of the W3C.
In 2007, I graduated as Master of Science (Technology) from Helsinki University of Technology, Department of Computer Science and Engineering. I wrote my master’s thesis about HTML5 validation.
My email address is email@example.com.
However, I’m near email bankruptcy, so other ways of communication are likely to work better. For questions about Firefox or Gecko, please consider using the dev-platform mailing list. For questions about HTML5 validation or the validator, please consider using the WHATWG help list instead of emailing me directly. For short things, tweeting to @hsivonen on Twitter or finding hsivonen on the #whatwg IRC channel on Freenode works better than email.
Please don’t email me about link exhange proposals or about translations whose main purpose is to get me to link to a particular site. I don’t participate in SEO schemes.
pub 1024D/4BF78053 2008-02-26 Key fingerprint = F48B 82DF CB8E C84C 5418 01FC CEE1 2226 4BF7 8053 uid Henri Sivonen <firstname.lastname@example.org> sub 2048g/1E6BCBC3 2008-02-26