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How Yichao “Peak” Ji became a global AI app hitmaker

Caiwei Chen

created: Sept. 8, 2025, 10:30 a.m. | updated: Sept. 9, 2025, 2:40 p.m.

Now based in Singapore, he leads product and infrastructure development as the company pushes forward with its global expansion. Despite his relative youth, Ji has over a decade of experience building products that merge technical complexity with real-world usability. His fluent English set him apart early on, but it was an elementary school robotics team that sparked his interest in programming. In 2010, as a high school sophomore, Ji created the Mammoth browser, a customizable third-party iPhone browser. But Ji wasn't put off a career in tech by that early brush with a multinational legal team.

3 months ago: MIT Technology Review