OpenSignal
High signal for high-stakes hires.
The best people know who the best people are. If you have worked with someone exceptional, nominate them. If they get placed, you take home 30 to 40% of the placement fee. Fees run 20 to 30% of comp, so nominating an engineer into a $1M total-comp role means $50K to $120K to you, on that nomination alone. No spam, no spray-and-pray.