The legislation recognises three different types:
An agreement for the performance of a work assignment – can be concluded with a natural person if the scope of work (a work assignment), for which this agreement is concluded, does not exceed 350 hours in a calendar year.
A students’ part time work agreement – can be concluded only with a college student (or a student older than 16) or with a full-time university student, who has not reached the age of 26. The scope of performed working activities cannot exceed 20 hours a week on average. See the template we have prepared for you here.
Agreement on working activity – can be concluded only for a work activity not exceeding 10 hours a week.
All of these agreements can be concluded for a fixed time and for the maximum of 12 months.
There is a different regulation in the Czech Republic, see here.