Brian Yun
Brian Yun
Co-founder & CEO at Endo Health (a16z SR003). Medical doctor turned engineer building gamified, data-driven consumer healthcare to reverse diabetes.
Projects
Ideas brought to life. A look at the products, companies, and creative works built from the ground up.
Endo Health
Consumer healthcare startup using gamified engagement and data to reverse type 2 diabetes; backed by a16z Speedrun (SR003), General Catalyst, and angel investors including Anne Wojcicki.
Viral text-based RPG (Krafton / Thingsflow)
Led product and engineering work at Thingsflow (Krafton) including launching a text-based RPG that became a nationwide viral hit in South Korea; scaled AI-powered consumer features.
Early startup — water purification (Intel Global Challenge)
Founded a water purification startup as a teenager and presented at the Intel Global Challenge; cited in multiple bios as an early entrepreneurial milestone.
Personal writing & essays
Publishes essays on startup strategy, product, and healthcare (personal blog discussing mission to 'advance human lifespan by one year').
In the Spotlight
A collection of articles, interviews, and viral content where achievements have been shared.
Recognitions
Formal validation from the top. A showcase of official awards, grants, and government acknowledgements.
O-1A Visa
Aliens of Extraordinary Ability. Reserved for individuals who have risen to the very top of their field.
Pitching Ground — 2nd place
November 2017Award listed on LinkedIn profile (Pitching Ground 2nd place).
U-CONTEST — 2nd place
November 2017Award listed on LinkedIn profile (U-CONTEST 2nd place).
Samsung Humantech Paper Award — 1st place
January 2015Listed as Samsung Humantech Paper Award winner on LinkedIn profile.
Minister's Award (Ministry of Science, ICT and Future Planning)
November 2014Listed on LinkedIn profile among honors for innovation/entrepreneurship.
Work Experience
Key roles that defined the journey.
Co-founder & CEO
2024 - PresentLeading product, strategy, and fundraising for a gamified consumer healthcare startup focused on reversing diabetes; backed by a16z Speedrun and other investors.
Product Lead / Tech Lead / Group Lead (Engineer)
Post-medical school (exact dates not publicly listed)Built and scaled AI-powered consumer features and led engineering/product teams; launched a text-based RPG that achieved nationwide viral adoption in South Korea.
a16z Scout / a16z Speedrun participant
2024 (SR003 cohort)Selected for a16z Speedrun (SR003) as a founder; participated in the a16z founder program and network (mentor and investor exposure).
Membership
Affiliations and memberships in prestigious organizations and communities.
Selected founder in the a16z Speedrun accelerator program (Cohort 003).
Listed as an a16z scout / affiliate in public bios and LinkedIn activity.
Profile listing on Forbes Councils under Hui Sang Yun / Brian Yun describing role and background.
Early entrepreneurial participation and recognition (presented water purification startup at Intel Global Challenge).
Education
Academic foundation and learning journey.
MD (medical degree)
Medical degree from Yonsei University (Severance Hospital) — cited in a16z Speedrun profile and Forbes Councils.
Cohort participant / founder program
Participated in the a16z Speedrun accelerator (Cohort 003).
Socials
Connect and explore.