Hi @Aslan
It is not clear from your question whether your company is asking you to go on a short-term basis to Germany and then return to Poland or move to Germany long-term.
In the first case, you do not need a work visa. This procedure is called ‘Entsendung’ in German. If a person is living and working legally in one EU country, then they can be sent to work in another EU country without needing a residence permit.
In the second case, you require a work visa from the German embassy. If you come to Germany and apply here, you will be told to go back to Poland and apply with the German embassy there.
Best,
Éanna