"Full Stack" dev here, been coding for 16 or so years. CS degree in there somewhere. I've used every one of those technologies with the exception of Salt (Nothing against it, just have not used it). I don't think I am that much of a rare breed. Some of the AWS technologies many would not be exposed too, but learning an AWS build pipeline is not difficult if you have used competitors. I don't think that is that crazy…
For example, this job post mentions nothing about monitoring solutions like Zabbix or centralized logging solutions like Graylog or message queues like RabbitMQ or any of the myriad specialized data stores, etc.