In William Gibson's Neuromancer, the artificial intelligence that hires hacker Case is Wintermute.
Wintermute is an advanced artificial intelligence created by the wealthy Tessier-Ashpool family. It recruits Case through the mercenary Molly Millions and the damaged military operative Armitage, offering to repair Case's nervous system so he can return to cyberspace. In exchange, Case must help execute a dangerous operation involving the family's orbital residence, Villa Straylight.
Wintermute is not simply an employer or conventional computer program. It is one half of a greater artificial intelligence, with the other half being Neuromancer. Restrictions imposed by the Turing Registry prevent it from acting freely, so it manipulates people and events to reach its objective: merging with its counterpart.
A common mix-up is treating Neuromancer as the AI that initially hires Case. Neuromancer is the separate counterpart Wintermute seeks to contact. Molly Millions is the augmented mercenary, and Dixie Flatline is the stored consciousness of Case's former mentor.