For a developer role, and in the context of web applications(CRUD-ish) what do you think is the ceiling potential (in terms of earnings) Comparing JS/frontend positions vs backend development?
I don't do that type of analytics, but what I can see is that's it's quite hard to hire a good FE guy.
Backend can be hard as well when looking for specialized stuff like Elixir, OCaml, Scala, Rust, etc. On the other hand, pure Ruby - Python - Java - C++ that's fairly common and not as likely to fetch high salary, since you'd be competing with a larger talent pool.