Projects

Work I have built, led, and contributed to, plus earlier student projects.

Selected work

5 projects
  1. to PresentOpenAI · Research preview

    Codex Security

    Securing AI systems and applying AI to software security at OpenAI — using models to find and fix vulnerabilities in code.

  2. to PresentCo-founder & CTO through acquisition · Continued at OpenAI

    Promptfoo

    Started as a developer-first eval tool and grew into a platform for AI security, red-teaming, and compliance: evaluation framework, vulnerability scanning, static analysis, and automated red-teaming. Reached more than 350,000 developers, 130,000 monthly active users, and teams at more than 25% of the Fortune 500 before joining OpenAI in 2026.

  3. to VP Engineering & Head of AI

    Smile ID

    ML-powered identity verification APIs used by banks, fintechs, and telcos across Africa. Re-architected inference to scale from 1,000 to more than 1M users per day, cutting job time from over 30 seconds to 7 seconds, and shipped a fraud detection product built on 1-N facial recognition.

    AWS LambdaComputer visionEmbeddingsVector search
  4. to Co-founder & CTO

    Arthena

    Quantitative art-investment platform backed by Anthemis, Foundation Capital, and Y Combinator. Built valuation models over irregularly sampled time series, plus the data pipelines and research tools behind them. Masterworks later acquired the company in 2023.

    Graph embeddingsProbabilistic forecastingOnline learningMicroservices
  5. to Co-founder

    Matroid

    Computer vision platform for creating and deploying detectors. Architected and built the initial platform for identifying objects, events, and patterns in video, and carried it through the seed round.

    Computer vision

Archive

5 projects

Student projects, hackathons, and experiments, kept for the record.

  1. Nearest Dollar

    BVP Hackathon

    Connected to bank accounts to round up purchases and donate spare change to charity.

    ReactNode.jsPlaid APIMongoDB
    No public link

  3. Space Potato

    Kickstarter-funded weather balloon

    Potato-powered weather balloon with cameras. Photos published in a coffee table book.

    HardwareGPSPhotography
    No public link

  4. Cat Detector

    CNN for cat breed classification

    Classified 60,000+ cats across 80 breeds before server costs shut it down.

    PythonCNNAWS
    No public link