Yes, a valid job offer is mandatory for most types of Italy work visas. Without it, you cannot begin the visa process.
Why it's needed:
- Employer applies for your work authorization (Nulla Osta)
- Italian government verifies your employment status
- Seasonal and salaried permits both require employer sponsorship
- The visa is issued only after the job contract is verified
Self-employment visas are the only exception and have different requirements.