I embedded myself in a vibe coding team at Gemini's AI hackathon in Singapore. Building an app in 7 hours takes real work.

I followed a hackathon team as they raced to vibe code an app in seven hours at Google's Gemini 3 Hackathon in Singapore.

Lee Chong Ming/Business Insider

• I spent seven hours with a vibe coding team at Google's Gemini 3 hackathon in Singapore.
• Watching from the sidelines was intense.
• From prompting and debugging to filming the demo — here's how it all unfolded.

Just after sunrise, four vibe coding enthusiasts from Malaysia crossed into Singapore with a loose idea ...