EY
Eugene Yan
AI LeaderMember of Technical Staff @ Anthropic (ex-Amazon Principal Applied Scientist)
San Francisco, CA
Member of Technical Staff at Anthropic building AI-powered products. Previously Principal Applied Scientist at Amazon building real-time retrieval, bandit rankers, and AI systems for summarization, translation, and Q&A. Creator of ApplyingML.com and Applied-LLMs.org which collect practitioner knowledge on applying ML in production. Led ML/AI teams at Amazon, Alibaba, Lazada.
Recommendation SystemsApplied MLLLM ApplicationsML Systems Design
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Latest content
Auto-updated feed Blog Dec 14, 2025
2025 Year in Review
An eventful year of progress in health and career, while making time for travel and reflection.
Blog Nov 23, 2025
Product Evals in Three Simple Steps
Label some data, align LLM-evaluators, and run the eval harness with each change.
Blog Oct 19, 2025
Advice for New Principal Tech ICs (i.e., Notes to Myself)
Based on what I've learned from role models and mentors in Amazon