I've had some trouble finding explicit node backend jobs, as someone who'd consider themselves a relative specialist in it. Most places want a full stack developer well versed in common frontend frameworks and maybe a tiny bit of services on the backend. Most backend focused jobs (rightly, probably) focus on more traditional stacks or go. There's amazing things one can do very quickly with node exp (serverless/Faas services for one) but I've been struggling to find positions reliably.