I Only Wanted a Job, You Sent Me to the Underworld

Unemployed programmer Su Chen lands a job at a mysterious IT company, only to find out his work involves managing the backend of the Underworld's Book of Life and Death. Unable to resign and burdened with a unique yin-yang fate, he travels around fixing servers that connect to the netherworld. Ignoring risks to defy fate, he incurs serious crimes in the Underworld and unlocks high-risk yin-yang missions. He roams the Underworld, makes like-minded friends, forms his own project team, and faces countless crises involving human disasters, spirits, and otherworldly evils. Using karma to balance all things and heavenly retribution to punish the wicked, he witnesses the reincarnation system of the Underworld and eventually leads his team to the top of the Underworld's business rankings. A modern workplace supernatural story that explores the cycle of good and evil and the clarity of divine justice. — Description from novelcodex.org