>At Oxide, we do "web API layer" stuff in Rust. We also don't require that candidates be Rust experts, though obviously experience helps. Many of those people who are "proficient in C#, JS, Java, Go, Python and the like" can absolutely write Rust, even if there is some slowness at first.

Many of developers who are skilled in X can learn Y. But that doesn't mean you should hire X developers and ask the to do Y.

The process should be easy. Identify the tool which is most fitted for the project. Hire developers proficient in that tool.