Thus, I found a freelance job. Similar to the one I did once for Google. You need to come there from time to time and perform some small tasks... However, one of two companies I have applied to is very interested in work with me; so once they have some work, they will call me. Their office is situated in Zürich. Haha. Hope, they will really call me.
For this, I even don't need a permission to work, since they usually pay 100.- GBP Amazon-vouchers which is quite not bad for couple of hours of work a day.