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.
You can see some of these tools in action on wikis such as Halopedia.
I've also had a major role at open-sourcing some major projects using MediaWiki, namely Wikia, ArmchairGM and wikiHow.
Before my involvement, Wikia and ArmchairGM weren't open source and wikiHow's tarball of their source code wasn't updated very often.
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).
Extension support requests belong to their respective talk pages, because that way more people — myself included — will see your message and more people will benefit from the question/problem and the solution(s).
My talk page can be used for other public matters, and you can also contact me privately via email.