In the past, I have been working on SEO for some Polish websites and professionally on some English websites, mainly at work though.

January 2010-August 2010 - working on the container rental website (wynajem kontenerów):

We achieved position 10 on a page 1 in google.pl for the main keyword "kontener"
SEO work stopped at because of scaling the business down.

I often do ad hoc freelance projects for Polish and Australian companies.