👋 Hi, I'm Eugene Yan.
I work at the intersection of consumer data & tech to help customers via machine learning systems. I write about effective data science, learning, and career to help readers.
Just released: How To Be An Effective Data Scientist 🚀, a free email course.
Other resources:
- Papers, Articles, and Blogs on Applied Machine Learning
- Template for Python Project with Automation and Collaboration
- Workflow for Experimentation with
Jupyter,Papermill,MLflow
Latest
Advice for New Principal Tech ICs (i.e., Notes to Myself)
19 Oct 2025 · 14 min · [ leadership engineering career ]
Based on what I've learned from role models and mentors in Amazon
Training an LLM-RecSys Hybrid for Steerable Recs with Semantic IDs
14 Sep 2025 · 23 min · [ llm recsys learning 🛠 🩷 ]
An LLM that can converse in English & item IDs, and make recommendations w/o retrieval or tools.
Evaluating Long-Context Question & Answer Systems
22 Jun 2025 · 28 min · [ llm eval survey ]
Evaluation metrics, how to build eval datasets, eval methodology, and a review of several benchmarks.