Guang Cui
| Guang Cui | |
| Occupation | Co-founder and CTO of Miyagi Labs |
|---|---|
| Known for | Miyagi Labs (AI-powered exam prep platform) |
| Education | Massachusetts Institute of Technology (B.S. in Mathematics and Computer Science) |
| Website | miyagilabs.ai |
Guang Cui is an American technology entrepreneur and former quantitative trader who is the co-founder and chief technology officer (CTO) of Miyagi Labs, an artificial intelligence-powered exam preparation platform. Miyagi Labs was part of the Y Combinator Winter 2025 batch.[1]
Early life and education
Cui is from Maryland. He attended the Massachusetts Institute of Technology, where he earned a bachelor's degree in mathematics and computer science. While at MIT, he conducted research in mathematics and theoretical physics. Prior to college, he was involved in mathematics and computer science competitions during high school. He also competed on the television show American Ninja Warrior as a rising MIT senior, alongside fellow MIT student Daniel Sun.[2]
Career
Before founding Miyagi Labs, Cui worked in quantitative finance. He held internships at Jane Street and Akuna Capital, and subsequently worked as a quantitative trader at Five Rings for over a year. He also worked as a software engineer at Instagram and served as a researcher at MIT. Additionally, he coached at Gymja Warrior, a ninja warrior-style training facility.
In January 2025, Cui co-founded Miyagi Labs with Tyrone Davis III, a college friend who also had a background in finance. The company was accepted into Y Combinator's Winter 2025 batch. As CTO, Cui oversees the technical development of the platform.[3]
Miyagi Labs is an AI-powered exam preparation platform designed to help students prepare for standardized tests such as the SAT and ACT. The platform offers diagnostic tests to identify a student's strengths and weaknesses, personalized study plans, an AI tutor that provides explanations for questions, over 10,000 expert-reviewed practice questions, full-length practice exams, and progress tracking with score prediction analytics. The platform also incorporates gamification elements such as achievements, streaks, and rewards to encourage continued study. According to the company, students using the platform improve skills twice as fast compared to unguided practice.
References
- ↑ "Miyagi Labs – Y Combinator". 'Y Combinator}'. Retrieved 2026-03-18.
- ↑ "Teenage MIT ninja students". 'MIT News}'. Retrieved 2026-03-18.
- ↑ "Miyagi Labs". 'Miyagi Labs}'. Retrieved 2026-03-18.