Neon District: ALPHA(The Neon District Trilogy, Book 1) by Chad Campbell

NEON DISTRICT, Caiden Nyx, a brooding prodigious black-hat hacker living his life on the fringes of criminality. Plagued by clouded memories of his past, and haunted by his extraordinary mental and physical capabilities. His desire to learn his past thrust him toward a thrilling, perilous journey uncovering dangerous government conspiracy, and cathartic self discovery. Forming unlikely friendships, he presses forward into the unknown madness of the sprawling city-state that will not only test his willingness to adapt, but his will to survive.