Laundry Files Series by Charles Stross
Written by a ex-programmer, features a world where magic is a branch of mathematics, so you can for example write an app to summon demons, or accidentally turn yourself into a vampire by implementing a particularly extravagant algorithm.
The problem is that whatever system we come up with in theory, will have to be built in practice out of people, and there is never any shortage of people who will happily abuse the system and fellow people out of greed or delusion. That's why an AI overlord arising and taking over is not a threat, it's our only hope /s
https://www.goodreads.com/series/50764-laundry-files