As soon as you finish your studies, you should consult with your contact persons at the local office of immigration (in Dortmund: "Dienstleistungszentrum für Visa-Angelegenheiten, ausländische Studierende und Fachkräfte"), as your residence permit must change accordingly.
In this flyer of the city of Dortmund you will find various information, for example, on how to find a job, how to extend your residence permit in order to pursue employment, and the responsible contact persons.
(Online) information events are regularly organised together with the local office of immigration (in English and German).
Here you will receive an update on the current laws and the latest changes in the law on foreigners, which you can use to plan your studies and career entry. The experts from Bürgerdienste International (Local office of immigration Dortmund) and TU Dortmund University will then be available to answer your questions.
As soon as the event is offered again, you will find all the information here!