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Carol Li

Investor at Y Combinator

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Overview

Carol Li serves as an Investor at Y Combinator as of June 2023[1][3]. Li is a resourceful entrepreneur, angel investor, and community builder who has spent the past seven years scaling Billow.fun from a grassroots idea into a 10,000-member tech community[2][4]. As a community leader, Li focuses on creating real value through spaces that spark authentic engagement, inclusive programming, and meaningful collaboration[2]. Li holds a Master of Science in Biostatistics and Statistics from Washington University in St. Louis and a Bachelor of Science in Statistics and Mathematics from the University of Illinois Urbana-Champaign[11][12]. Prior to the current role at Y Combinator, Li worked as a Senior Data Science Lead at Microsoft, a Data Scientist at Merck, and an Angel Investor with Keiretsu Forum[6][9][7].

Profile introduction
Source excerptLinkedIn [2]

I’m a resourceful entrepreneur, angel investor, and community builder who has spent the past seven years scaling Billow.fun from a grassroots idea into a 10,000‑member tech community. What started as a small gathering has grown into a vibrant ecosystem where people share resources, build friendships and wealth, and accelerate one another’s growth. As a community leader, I focus on creating real value , not vanity metrics. I design spaces that spark authentic engagement, inclusive programming, and meaningful collaboration. I thrive around builders, entrepreneurs, and investors who operate with…

Career history

  1. InvestorJun 2023 to presentY Combinator
  2. Co-FounderJun 2018 to Aug 2026Billow
  3. Vice President of GrowthMar 2025 to Jul 2026iFoodBee
  4. Sr. Data Science leadAug 2018 to May 2026Microsoft
  5. Angel InvestorApr 2023 to Apr 2025Keiretsu Forum
  6. Data science instructorMay 2020 to Jun 2022Uoffer
  7. Data ScientistJul 2015 to Aug 2018Merck
  8. Data ScientistJan 2014 to Jul 2015Qlarant

Education

  1. WUMaster of Science (M.S.), Biostatistics & StatisticsWashington University in St. Louis
  2. Bachelor of Science (B.S.), Statistics & MathematicsUniversity of Illinois Urbana-Champaign
  3. Mathematics and StatisticsUCLA

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