Does front-end developer really exist?

Question

You need to know and do back-end to be able to manage front-end.

Answer 1

they can be completely seperated. front end developer manage every user interaction, while the logic handled by backend abstracted by an API.
we even have firebase today, a posibility for clientside to directly interact with database. so depend on the system some front end may not need to rely on database interface in form of API anymore

Answer 2

Yes