How to interview a blockchain developer candidate

It's a known problem in the hiring world that assessing the competence and skill of a potential candidate for a role is difficult.  It's even worse if you're hiring in a space that you're unfamiliar with, because it's easier for the candidate to pretend they know more than they do, or are less experienced than they present themselves.  And blockchain is an unfamiliar space for most recruiters and hiring companies.  In this video I discuss the problem, and some of the solutions.