Reference:

• Feb 2005: Haiping accidentally helps start Lunch 2.0
• March 2007: joins Facebook
• April 2007: secretly starts working on PHP compiler
• December 2009: HipHop starts to replace Zend/PHP at Facebook
• February 2010: HipHop released

(OH: Any time you’re on the same list as Jay-Z, you must have made it in the programming world.)