I once got a couple of interviews through the https://weworkremotely.com/ site. Seemed like a good selection there, and it was open, which was nice. Seems like this one is aspiring to be like that. That's cool, it's a growing space. Any others?
Personally I ended up taking a local job as I find it more enjoyable to work alongside a team, but maybe in the future would take another look.
RemoteML for data scinetists? Never tried, but I saw some offers here and there: https://remoteml.com/