I'd almost advocate maybe even providing less signaling, like a technical chat-roulette where you get put into a pool and both sides can just "NOPE" out at any time if the interaction isn't sparking joy. Only when you build a rapport talking about the kind of work and challenges does it allow you to say: okay, let's meet later in an attributable fashion for real.

Also, bonus points if it involves OTR/PFS so you can talk details without attribution and know that since you're in a "pool" if you got through to an identifiable, in-person interview you can pretend like it never happened, but the candidate and the engineer both at some point definitely interacted in a way that they both felt comfortable proceeding to that point.