I highly disagree. There's a huge amount of material out there for advanced software engineering. The problem is this material is exponentially harder and most

I highly disagree. There's a huge amount of material out there for advanced software engineering. The problem is this material is exponentially harder and most programmers aren't interested in this stuff. What OP is talking about is essentially learning a new language which is sort of trivial and not advanced. It's sort of a parallel track and he likely wants something that doesn't start at the very beginning. Something called: "Learning elixir for experienced programmers". This kind of thing isn't "advanced". It's more like "convenient". Most programmers spend there entire careers in this zone just learning new languages and new technologies. They are sort of moving horizontally through the field rather then upwards. True advanced stuff is hard af, and the more advanced you get the less and less relevant it is to your job.