I'm Tar Lócesilion, a Polish Wikipedian since 2010, and now, a WMF contractor as well.
I consider myself as a user of Polish Wikipedia and a Wikimedian (I don't want additional permissions such as admin to define me). I've been a member of Polish ArbCom for 1,5 year. I edit meta-pages (Wikipedia, Help, Template, MediaWiki, etc.). As for articles, I write about my home city, law, Tolkien's works, music, and fix a crazy variety of pages :) See my global contributions.
Since 2011 or 2012, I've been a (maybe the) contact person for the WMF technical staff on Polish Wikipedia.
pl-N, en-3, fr-2, la-2, fi-1
Friendly disclaimer: I'm not a WMF employee. I'm temporarily hired to serve as a link between communities and the 2017 Wikimedia Movement Strategy process. After that, I'll be just a Wikipedian again.
My task is to carry invitations out to communities, run targeted discussions on assigned subjects, monitor discussions on large questions, summarize both English and non-English feedback in English on Metawiki, report on major themes that emerge, and serve as coordinator for workgroups.