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Brian Yun, MD

Brian Yun, MD

Medical doctor turned engineer, CEO at Endo Health

San Francisco, California
Joined August 2025
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Summary

Brian Yun is a visionary entrepreneur dedicated to leveraging technology, particularly AI, to solve significant healthcare challenges. His core mission is to 'advance human lifespan by one year' by combining the deep impact of medicine with the scalability of software, a philosophy shaped by his experiences as both a medical doctor and a software engineer. brianyunmd+2
With a unique background spanning medicine, engineering, and product leadership, Brian has a proven track record of founding and scaling ventures. From co-founding a water purification startup at age 16 to launching a viral text-based RPG at Krafton and leading AI product development at thingsflow, he demonstrates a blend of technical prowess, strategic thinking, and entrepreneurial drive. a16z+1
Brian is recognized for his leadership and ability to 'create followership,' even as a young leader managing experienced teams. He achieves this through competence, delivering measurable impact (e.g., 5x conversion rate increase at thingsflow), actively supporting his team, and maintaining a high level of dedication and optimism. brianyunmd
His expertise and accomplishments have earned him an O-1 extraordinary ability visa, a testament to his significant contributions and influence in his fields. extraordinary+1

Work

Education

Projects

Writing

Advancing human lifespan by one year

December 1, 2023

A personal essay outlining his vision to combine medicine and software to make a large-scale impact on human lifespan, inspired by early medical experiences and software scalability.

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Generalists and Specialists

August 1, 2023

An essay discussing the career paths of generalists vs. specialists, drawing parallels to figures like Taylor Swift and Whitney Houston, and reflecting on his own 'jack of all trades' experience as an entrepreneur.

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How to create followership

August 1, 2023

A blog post detailing his strategies for leadership and building followership as a Group Lead at thingsflow, emphasizing demonstrating impact, helping others, and dedication.

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