I am not sure I follow - when you hire you search for someone who has 100% coverage of the tech you're using and also already works for your direct competitor?

Let's say you're hiring manager for a company that compares flight tickets, something similar to Google Flights or Skyscanner. You need three additional Rust engineers. You're located in Palermo, Italy.

How do you hire people that would not only know Rust, be willing to move to Palermo, or at least visit occasionally, but also know the airfare business?

Even if you're willing to have people remotely, in the same region, how many unemployed Rust developers that know that business are on the market? 0?

> when you hire you search for someone who has 100% coverage of the tech you're using and also already works for your direct competitor?

Ideally, yes. It's a common occurrence among large organisations. Google and Apple used to even have an anti-poaching agreement.

> How do you hire people that would not only know Rust, be willing to move to Palermo, or at least visit occasionally, but also know the airfare business?

Rust isn't Boring, which is why you don't do that and hire one of many Java developers and do Java, unless the tradeoff is really worth it.