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Career profile

Jack Singer

Professional

United States

Career path.

  1. Substack

    Researcher & Writer

    May 2025 - Present
  2. OpenAI

    Member of the Technical Staff

    May 2025 - Present
  3. Paygent

    Founder

    Apr 2025 - Present
  4. Bain Capital Ventures

    Venture Fellow

    Feb 2025 - Present
  5. New Enterprise Associates (NEA)

    Venture Fellow

    Dec 2024 - Present
  6. Allium

    Growth Engineer

    Aug 2024 - Present
  7. Kleiner Perkins Caufield & Byers

    Engineering Fellow

    May 2024 - Present
  8. Allium

    Data Analytics & GTM

    May 2024 - Aug 2024
  9. Citibank

    Software Engineer

    Jun 2022 - Jul 2022
  10. Massachusetts Institute of Technology

    Researcher

    Aug 2021 - Dec 2024