What is a universe programmer?

Universe Programmers are theoretical or fictional professionals who design, create, and maintain the fundamental rules, systems, or code that govern an entire universe—often seen in science fiction, video games, or simulation theory. Their work involves controlling physics, logic, and the underlying structure of reality within a simulated or virtual environment. While not a real-world profession, the concept is popular in discussions about advanced artificial intelligence, simulated realities, and world-building in entertainment media.