Can I work in Poland after my visa has expired?

If, on the day you submit your application, you can work based on a registered declaration (issued from 01/01/2018) or a work permit with your current employer in the same position, and you apply for a residence permit while legally in Poland with no formal defects, you can keep working during the residence permit process. If you don’t meet these conditions, you can still work as long as you have a work permit or a registered declaration.