How would you filter for a "technically curious" candidate at the junior level (I'm assuming someone who, for example, pursues a Master's or beyond demonstrates

How would you filter for a "technically curious" candidate at the junior level (I'm assuming someone who, for example, pursues a Master's or beyond demonstrates this to a degree)? It certainly doesn't help that an overwhelming amount of junior postings are more interested in the candidate being experienced with the particular stack, so, unless your interests happen to align with what's industrially pragmatic, I imagine the kid who stays overnight in the lab doing something in Haskell or some other "obscure but requires a non-trivial amount of autodidacticism" activity wouldn't be very happy about those valuable nights in their youth bearing them no fruit.