Restaurants look above all for chefs and experienced service staff. In kitchens without guest contact, practice counts for more than the language level.
An honest description of the working hours is important. Split shifts and weekend work are usual, but they should be named in advance.
Seasonal businesses often provide accommodation. That makes placement much easier, because housing in holiday regions is scarce.
Many candidates bring experience from hotel and restaurant kitchens. They learn the recipes and routines of a German business during their induction.