I want to be upfront. Here's the difficulty. (I say this as an employer.)

Let's say I'm looking for engineer #2 or #3 for my YC startup and I'll pay 95k for junior or 185k for senior.

Is posting 95-185k really that useful?

What happens when I offer someone 130k but they were expecting 185k?

And you can't just use years of experience alone to rank junior vs senior.

tl;dr If engineers were more fungible, I could post a precise number. But I don't think they are.