leader of WikiProjects Middle-earth and Law on pl.Wikipedia (both hardly active now)
Wikimedia Polska member
informal representative of the Wikimedia community in local media (until ca. 2014)
2011
pl.Wikipedia admin
newbie mentor on pl.Wikipedia (until 2015)
pl.Wikipedia R&D group member (leader from 2012, the group's been dormant since ca. 2014)
in that group, we were building useful non-article pl.Wikipedia pages. The goal was to make them clear, friendly, standard, up-to-date, detailed but sufficient and not too long, effectively suggested to users when needed. We were restructuring, redesigning, updating, archiving, merging and creating totally all that is not in the main namespace, including: policies and guidelines, village pump subpages, anything in Wikipedia: namespace, help pages, templates with their documentation, categories and navigation, WikiProjects and Portals, MediaWiki: pages, and more.
co-author of a reviewed paper on the use of pl.Wikipedia in Polish administrative courts (after that, I wrote 2 other papers related to Wikimedia and law)
initiator of WikiProject Middle Ages on pl.Wikipedia (didn't work out)
editing content
2010
editor (home wiki: Polish Wikipedia)
I've been editing articles (mainly) about Tolkien, my home city, and law