I have been on the hiring side and always try to offer feedback, even through back-channels. If you tell me, "Hey, thanks for spending so much time with us, th

I have been on the hiring side and always try to offer feedback, even through back-channels. If you tell me, "Hey, thanks for spending so much time with us, the team really loved talking with you, and we were super impressed with your experience in X and we were really impressed with your take-home and the way you dealt with questions about why you decided to go with the architecture that you did. It was a really hard decision, but ultimately we decided to go with someone that we felt had a bit more familiarity with Scala and also had more client-facing experience because it meets our current needs. We'll each out in the future if we think there's a mutual fit, otherwise best of luck in your search!" That may be mostly bullshit, cause there are things you can't say, but at least it helps me hone in on either areas where you were looking for something I wasn't, or areas where I might be able to improve. Maybe I get feedback from 3 or 4 places that they want more experience with scaling issues so maybe I spend the next 6 months trying to hone those skills. I really don't think it's hard to offer actionable feedback, as I've done it for every person I've ever interviewed. I'm not gonna tell someone I thought they were annoying, or underprepared, or grossly over-represented their abilities, it's not a perfectly honest feedback system, but i I liked someone enough to spend multiple days with them, I'm certainly going to try to offer them something honest that I feel would make them a stronger candidate, for another company, or for future-us.