Changing the status of your Tourist Visa

Good day,

I would like some information about tourist Visas and residency in Italy. I have been asked to come to Italy for an interview. It is a job I'm very interested in and I'm sure I have the skills and ability to successfully obtain the position. The problem I have is that since I am a South African citizen, I will have to apply for a tourist Visa to enter the country which is only valid for 3 months. Is there any way to extend my stay or obtain residency if I get the position? Or do I have to return to my home country to apply for a work Visa. Any advice would be appreciated.

Regards
Bianca

Based on what I know, You have to return to your home country and apply for a new visa.