I'm curious if "messaging systems specialist" is an actual profile people hire for or if it's usually just part of a broader role like backend, devops or platform engineer.

Has anyone here worked in roles focused mostly on Kafka, RabbitMQ, Pulsar, NATS or similar systems? I find the whole topic fascinating, but wondering if it is a viable niche to specialize in or is it better to keep it general as part of platform/backend/cloud work?