Are You OK With Doing That?

Good companies expect you to be a master of whatever skills, tools, technologies, languages you've worked with in the past and not with the tools, technologies and languages that they are currently working with. If someone is just an amazing front end developer and they're interviewing at a company that just really needs to build out an API, it's hard to say like, yeah, they make beautiful things that animate well but don't know anything about databases. So I would try to find people on my team who have high level of proficiency in front end then measure them against how well they can adapt into a backend world.