As a graduate of a German university, you are legally entitled to a residence permit to look for a job.
The residence permit will be issued to you for a maximum of 18 months directly following your studies. If this maximum period was not used up when the permit was first issued, the residence permit can be extended accordingly. However, if you do not find a job during these 18 months, an extension is excluded and you are obliged to leave the federal territory.
This residence permit allows you to work without restriction.