Do you mean contracting? Assuming you have proper work permit, there's a chance you can't do part time or contracting in certain countries, especially in German

Do you mean contracting? Assuming you have proper work permit, there's a chance you can't do part time or contracting in certain countries, especially in Germany if it's your primary occupation as well. You'd need permission from your employer. If you narrow it down to what you specially you're looking for, it's going to be easier to provide you the answers. There are some contract jobs here: https://www.arbeitnow.com/contract-jobs https://www.arbeitnow.com/contract-jobs