In terms of concrete specifics, I've found having interviews with at least 3 engineers on the team you will potentially be working with to be really helpful for

In terms of concrete specifics, I've found having interviews with at least 3 engineers on the team you will potentially be working with to be really helpful for both sides to evaluate, and more specifically when the interviews are pair programming problem solving. You get to see how the candidate works through a problem and they don't have to code for an exact solution (or I don't think that should be the requirement anyways, it should be more about approach and communication than an exactly correct implementation , especially given limited time)