Welcome. I have been a MediaWiki developer since 15th of May, 2008 (under the commit name ashley).
I also maintain the various social tools, of which the most notable one is the SocialProfile extension.
I've also had a major role at open-sourcing some major projects using MediaWiki, namely Wikia, ArmchairGM and wikiHow.
From August to November 2012, I was the volunteer product manager for Wikimedia Foundation's admin tools development work.
I've been a staff member (Head of the Customer Support Team) at ShoutWiki since its very foundation (2007).