I have a working permit(Aufenthaltserlaubnis) for five years, that is tied to the company which I'm working full time at. I come from a non-EU country.
My Zusatzblatt says: "BESCHÄFTIGUNG NUR GEM. § 2 ABSATZ 1 NR. 3 BESCHV ALS SOFTWARE-ENTWICKLER BEI DER COMPANY ERLAUBT."
My company doesn't impose any restrictions on having a side job.
Am I allowed to work part time as self-employed with this permit? If not, what do I do to achieve this?