Rex A.

research @ openai

New York City Metropolitan Area

About

Experience

  • Member of Technical Staff at OpenAI
    2024 - Present · 2 yrs 7 mos

    RL for agentic coding, tool use & VLAs

  • Founding Engineer at Sizzle AI
    2023 - 2024 · 1 yr

    Reimagined personalized education with a small team led by Meta’s former VP of AI & funding from Owl, 8VC. Contributed across the stack — ML, mobile, analytics — to rapidly prototype and ship while scaling a consumer app from 0 → 100k+ WAU in first couple months Finetuned OSS models, designed data pipelines, built an A/B testing framework and shipped an LLM-based content generation & recommendation engine

  • Software Engineer at OpenSea
    2021 - 2022 · 1 yr

    [worked during leave of absence] Reported to the CTO as engineer #9, while headcount grew 20x and revenue 200x Spearheaded early trust & safety engineering efforts by deploying content moderation & fraud detection algorithms

  • Software Engineer at Spatial
    2020 - 2021 · 1 yr

    [worked during leave of absence] Explored the limits of immersion & productivity via virtual reality software. Revamped the content upload system & cloud storage integrations (Google Drive, Slack, Miro, etc) to enable users to interact with their files in a collaborative 3D environment Bridged AI and VR by prototyping with early private beta GPT-3 access

  • Software Engineer at Snap Inc.
    2020 - 2020 · Less than a year

    ∙ Built a revenue data dashboard and API for Snap Partners ∙ Prototyped a computer vision algorithm for automatic ad insertion in Snapchat Discover