If you want to really learn Linux and infrastructure stuff then you should become a systems engineer not a back end developer. Back end developers rarely become

If you want to really learn Linux and infrastructure stuff then you should become a systems engineer not a back end developer. Back end developers rarely become experts on those topics, since they are at least one layer beneath our area of concern usually. Even if you are working at a small shop chances are you will outsource those kinds of concerns to a hosting company like AWS.