James: I make 10000 USD a month.
Alice: Wow, you have a highly paid job.
Is the phrase “highly paid job” correct?
I think yes, but also wish to ask the native speakers here.
I assume that “high paid job” is an incorrect alternative.
Basically yes, that phrase sounds fine, though I might hyphenate highly and paid:
You have a highly-paid job.
I might also paraphrase it to sounds slightly more natural (though this is subjective):
Wow, you’re highly paid!
“High paid job” is grammatically incorrect because “highly” needs to be an adverb to modify the verb “paid”.