Can I work while I study?

Short answer: Yes, up to 20 hours a week and 1,040 hours a year, as an employee (EU Immigration Portal).

• About the 20 hours: the rule lets weekly hours be cumulated over 52 weeks within the 1,040 yearly limit. Bocconi reads this as allowing, for example, 40 hours a week for six months (Bocconi); other sources read it strictly. Get written confirmation from your employer and university before going above 20 in any week.
• Your work contract cannot run longer than your permit.
• Universities offer paid student jobs too, such as Padova's 200 hour collaborations (University of Padova).
• Study comes first. Failed exams put your renewal at risk (B36).