Jason Liu

Jason Liu builds developer experiences for Codex at OpenAI and created Instructor, a Python library for structured outputs from language models. He previously worked in machine learning at Stitch Fix and Meta and founded an AI consulting practice focused on RAG, context engineering, and evaluations.

Career

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Based in: San Francisco
Elsewhere

OpenAI

Feb 2026 — Present

Developer Experience Engineer, Codex

Andreessen Horowitz

Oct 2024 — Present

Venture Scout

567 Studios

2023 — Present

Founder

Work with Seed to Series B companies on AI best practices: RAG, Context Engineering, Evals

Stitch Fix

Staff Machine Learning Engineer
Feb 2018 — Feb 2023
San Francisco, California, United States
Data Scientist - Data Labs
Jan 2016 — May 2016
San Francisco, California, United States