Jason Liu¶

Machine learning engineer, angel investor, and creator of Instructor — a Python library for structured LLM outputs cited by OpenAI as inspiration for their structured output feature. Writing about open source and improving RAG applications.

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Popular Posts¶

• Advice to Young People, The Lies I Tell Myself
• Losing My Hands
• Systematically Improving RAG
• Context Engineering Series

Investments¶

Angel investor and scout for Andreessen Horowitz. Invested in Lovable, Modal, Exa, Browserbase, Raindrop.ai, Pydantic, and others. See full portfolio.

Consulting¶

Previously ran a solo consulting practice helping startups transition to AI, including Zapier, HubSpot, Weights & Biases, Modal Labs, Timescale, and Pydantic. More on how I approached indie consulting.

Training¶

Ran cohort-based training on RAG, AI agents, and independent consulting. Students came from OpenAI, Anthropic, Google, Microsoft, Amazon, McKinsey, and others. Course content is now open at Systematically Improving RAG.