Jamesin SeidelInvestment Partner

Jamesin Seidel

Jamesin joined Chapter One's investing team in January 2022. She came into investing through the worlds of anti-spam, online safety, and professional sports betting.

Before joining Chapter One, Jamesin was the tech lead for platform manipulation at Twitter. She focused on fake account detection, coordinated online harm, and election interference. Career highlights include developing algorithms to combat large-scale spam attacks, leading Twitter’s white hat investigations, and co-leading Twitter’s reporting on malicious automation and foreign interference during the 2016 Election for the Congressional Hearing. Prior to Twitter, she was a professional fantasy sports bettor working under Haralabos Voulgarious, using data and automation to get an edge in the sports betting market. 

Beyond work, Jamesin can be found on the poker tables and playing Zelda.

I think self-awareness is probably the most important thing towards being a champion.

Billie Jean King

  • Book to recommend

    The Art of Learning

  • A film to watch


  • Music to listen to

    Delilah by Florence + The Machine