In almost all cases a work permit must be tied to a job offer, so it's not possible to apply for a work permit in advance. You interview, you get the offer, an

In almost all cases a work permit must be tied to a job offer, so it's not possible to apply for a work permit in advance. You interview, you get the offer, and the lawyers at the company apply for the visa for you. There are some exception cases where an open-ended visa is possible, but this is uncommon - but if you're famous in the industry you may qualify.