Hangjian Li
Principal Applied Scientist at Walmart Global Tech
Bellevue, Washington, United States
Summary
👤
Senior🎓
Top SchoolHangjian Li is a Principal Applied Scientist based in Bellevue with a PhD in Statistics from UCLA and a decade of experience building statistically grounded ML systems in industry. He specializes in probabilistic graphical models and high-dimensional statistics, translating new algorithms and theory into production features for GenAI-driven Ads at Walmart Global Tech, including NL2SQL, query moderation, SFT/RL fine-tuning, and RAG systems. His background spans research and hands-on engineering roles at Walmart, Facebook, and Stitch Fix, giving him fluency in both core statistical modeling and applied ML productization. Notably, he blends theoretical rigor with practical system design—often focusing on scalable post-training and retrieval-augmented workflows that bridge research prototypes to deployed services.
10 years of coding experience
4 years of employment as a software developer
University of California, Los Angeles
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (6)
wrapper6
exponential5
simulate5
causal-inference4
evolution2
graph1
Programming languages (4)
Github contributions (5)
hangjianli/dag_network
Oct 2019 - Jun 2023
Contributions:48 pushes in 3 years 9 months
hangjianli/2019-fa-stats131
Sep 2019 - Dec 2019
Class repository for notes for Stats 131
Contributions:70 commits, 4 PRs, 56 pushes in 2 months
notesstats
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