Write a story set in a futuristic city where humans rely heavily on advanced technology for their daily lives

Write a story set in a futuristic city where humans rely heavily on advanced technology for their daily lives. The protagonist is a young engineer who discovers a flaw in the city’s central computer system that could potentially lead to a catastrophic failure. They must navigate through the city’s strict surveillance system and avoid being caught by the authorities as they work to fix the problem before it’s too late. Along the way, they uncover a dark secret about the city’s ruling elite and their control over the technology that governs everyone’s lives.