I Reincarnated as a System Quality Assurance Tester

A veteran video game QA tester dies and gets a job offer from a goddess: her new world's "System" is a buggy, unbalanced mess. His mission? Reincarnate as a normal adventurer, find and exploit every bug, glitch, and broken mechanic, and report them before they ruin the world. His reward? He gets to keep a "version" of every exploit he finds.