There are hardware engineers designing the facility, software engineers maintaining the software infrastructure, product managers scheming of ways to use Apple's cloud facilities, etc.
Well, yes. But it's worth taking note of the point that Governments subsidizing the creation of data centers in places like hicksville, NC with the idea that the jobs they create will become a huge boon to the local hicksville economy is fundamentally mistaken.
Aside from a skeleton staff to main the facility, most of the work is, as you say, create for people who will never need to set foot in North Carolina. The local jobs aren't bad for Hicksville, but they don't justify the huge subsidies, and they aren't going to ever save hicksville from economic irrelevancy.
The irony is that Apple basically used Republicans' blind allegiance to Job Creators to get huge tax breaks that will allow them to hire hundreds of people in the Socialist tax-happy hellhole of California, where most of the best knowledge workers live.
Town Manager William “Todd” Herms said Apple’s presence boosts the town’s tax base and helps it lower overall taxes...
Apple benefits from reduced taxes, and the town gets 50% of something rather than 100% of nothing.
It's a subsidy. The argument that they made more with the subsidy than they would have without it is separate from the idea that tax breaks don't amount to a subsidy (which was yummyfajitas assertion).