We're very boring, our stack is PHP/postgres/mysql. A lot of Symfony, a lot of Symfony-style-code on top of Wordpress (mentioning that usually puts people off but it's all PHP in the end, and you can choose to write clean code on either).

Lots of people see PHP in general as a dead end career-wise and WP specifically as almost an insult, so there aren't many that advanced their skills and have continued to work with PHP (or Wordpress, but I believe that an experienced PHP developer has no trouble picking up WP).

We're generally very neutral on how someone arrived where they are, we don't require certificates or degrees, we focus on experience and skills. I wouldn't hire someone who isn't experienced with at least one side of our stack though (unless they're extremely good) because it takes time from other developers to upskill them and that's the one resource we don't have.

I won't disclose where I work though as that would dox myself and I much prefer anonymity.