Paving My Way With Science In This Magical Universe

In the 22nd century, a scientist who dedicated his life to AI and analog microprocessors decided to spend more time with his wife after completing his project. However, a terrorist attack claimed the lives of him, his wife, and his AI friend.

Born anew as a baby, he discovers himself in a universe filled with magic, where people use it in a primitive manner. He is confident that with just a bit of research, he can enhance the use of magic in this new world.

However, his sole objective is to find his wife. To achieve this, he must grow stronger. With a scientific approach, he uses magic to make guns, computers, and AI. Will he succeed in reuniting with his wife in the end?

If you dislike:
An MC acts like a teenager,
An MC wanders from fight to fight suicidally,
Numerous unexplainable coincidences,
A universe akin to Matryoshka dolls (There is always an upper realm, right?)
People possessing an absurd amount of power (eg. demigods, true gods, amazing gods, or whatever)
then this novel is to your liking.

Note: Although this is technically a Sci-Fi novel, it incorporates elements of the magic and fantasy genres. And because this novel`s power system does not provide exponential growth to the MC, he will not be able to always grow stronger individually. He will have to make his country better with his knowledge. So kingdom building, advanced technology, and interstellar will have a substantial effect on the plot.