As a senior software engineer who has successfully contributed to startups that were subsequently acquired, and with over 9 years of experience across a variety of technologies, "Who's hiring" is probably not the first place I would go to look for job if I needed a change of scenery.

I love it for keeping an eye on the market, to see where trends are going, and for looking at what's local. If something REALLY interested me, I might establish a dialog, but the chances of something being interesting and local (or willing to hire remote at the salary requirements of the metro area I live in) are very slim.

The first place I would look for a job is my professional network: people I have enjoyed working with in the past. If you can't lure top talent with talk of tech, maybe also spend some time describing the team and what the work environment is like? Senior devs know that you don't work with the tech stack, you work with people, and the stack is just another tool in the toolbelt for solving problems.