Zhouyao Xie

About Zhouyao Xie

I build LLM and agentic AI for content classification at Meta and I write about AI engineering on zhouyaoai.substack.com.

Experience

1. Software Engineer, Machine Learning

   Meta

   Feb 2023 — Present · Menlo Park, CA, US

   Built LLM platform for content classification: Onboarded 5 partner teams, saving $18M+ in data collection costs and 6k+ engineer hours• LLM Fine-Tuning: Outperformed human level performance by fine-tuning LLMs for ads, posts, domains, and apps classification• Multi-modal LLM Fine-Tuning: Led intern project that accelerated multi-modal LLM fine-tuning by 9x with LoRA (intern received GE rating and return offer)• RAG: Achieved 87% precision and outperformed human raters by 38% by building RAG workflows for large taxonomy labeling of 1k+ categories• Training Infra: Developed SFT and inference infrastructure for LoRA and classification head fine-tuning collaborating with partner teams• RAG Chatbot: Built and deployed a RAG chatbot for content classification labeling questions. Served 2M+ queries from 1k+ users in FY25 and improved rater recall by 16%• Agentic AI: Designed and built TestWriter, a multi-agent test authoring system. Adopted by 40+ users across 10+ teams, generated 700+ test suites

Education

• Carnegie Mellon University

  Master's degree, Computational Data Science

  2021 — 2022

• Columbia University

  Bachelor of Arts - BA, Double Major in Computer Science and Statistics

  2017 — 2021