https://apnews.com/article/north-korea-weapons-program-it-workers-f3df7c120522b0581db5c0b9682ebc9b
Court documents allege that the government of North Korea dispatched thousands of skilled IT workers to live primarily in China and Russia with the goal of deceiving businesses from the U.S. and elsewhere into hiring them as freelance remote employees.
I mean it could just as easily be programmers, server admins, etc. In fact it seems far more likely than a customer service role where having an accent is pretty noticeable. They do say "skilled" workers
but yeah, its hardly nefarious for a country embargoed by the world to train workers to go abroad where they can earn higher wages in useful foreign currencies