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Justin H Lee

Justin H Lee

ML Research Engineer @ Cactus — Incoming OpenAI Software Engineer Intern

justin-2694
San Diego, California, United States
Joined May 2026
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Summary

Builds and releases tiny, on-device ML models — contributor and co-author on 'Needle', a 26M parameter function-calling model aimed at running and finetuning on consumer devices. github+2
Early-career researcher and practitioner in ML — combines academic research internships with applied engineering roles across university labs and industry internships. openreview
Active in the UCLA AI community and student consulting — serves as an AI consultant with Bruin AI, a student group that delivers AI solutions to startups and small businesses. theorg
Holds multiple short-term industry internships spanning backend engineering and security, indicating cross-disciplinary experience in production engineering and research-adjacent roles. github

Work

Education

Projects

Writing

Needle (project repository and citation)

January 1, 2026

Repository, documentation, and citable project entry for 'Needle', a 26M function-calling model (authors include Justin H. Lee). The repo contains the model, usage, finetuning instructions, and a citation entry.

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