For the later interviews, once you're left with a couple of candidates to decide from, I like product driven interviews. You choose a complex business requireme

For the later interviews, once you're left with a couple of candidates to decide from, I like product driven interviews. You choose a complex business requirement that is already implemented. You discuss different architecture options, feature trade offs... It's easier for both parts to connect, it will give you a glimpse of how the candidate faces requirements from other teams and you give him a taste of the inner workings.