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People / Sergio Mattei Díaz
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Career profile

Sergio Mattei Díaz

Codex @ OpenAI

San Francisco, California, United States

Career path.

  1. OpenAI

    Member of Technical Staff

    Jul 2026 - Present
  2. Microsoft

    Software Engineer II

    Sep 2025 - Jun 2026
  3. Microsoft

    Software Engineer

    Apr 2024 - Sep 2025
  4. Microsoft

    Software Engineer Intern

    Jun 2023 - Sep 2023
  5. Microsoft

    Software Engineer Intern

    Jun 2022 - Aug 2022
  6. matteing.com

    Full-Stack Product Engineering

    Jan 2022 - Mar 2024
  7. Cowork.to

    Founder

    Apr 2019 - Jan 2020
  8. Makerlog

    Chief Executive Officer

    Jan 2018 - Jul 2021
  9. Taleship

    Founder

    Jun 2017 - Jul 2018