Dungeon creator of magical world

Ritvik at the age of 30 died and reincarnated in another universe. He got a mysterious ownerless system which helps him create dungeons . This is the story of a person who hides behind the scene and conquers the world with dungeons created by him. This is the story of rise of humans who deems as weekest creature in whole universe. This is the story of rise of science in the world where magic reign supreme. Note:--- 1-- Mc is not hero type amd is cautious. 2-- Mc is smart and does not like to fight strong enemies to become stronger so there is no threat to mc life in every few chapter. 3-- Not everyone would just charge at mc and become his enemies so you could expect for him to have a lot of allies and enemies. 5. Release would be inconsistent. 6. English is my third language.