Reminds me so much of Machine Man by Max Barry. "Charles Neumann is a mechanical engineer working at Better Future, a military research company. After losing on

Reminds me so much of Machine Man by Max Barry. "Charles Neumann is a mechanical engineer working at Better Future, a military research company. After losing one of his legs in a hydraulic clamp, he begins to tinker with leg prosthetics. The replacements he builds are so advanced that he amputates his remaining leg in order to make full use of them."