Puxin Xu
Staff Data Engineer, Research
New York, New York, United States
Summary
👤
Senior🎓
Top SchoolPuxin Xu is a Staff Data Engineer in Meta AI with a decade of experience building data pipelines and research-grade preprocessing for LLM and multi-modal pretraining, and is a core contributor to Llama2 and Llama3. Based in New York, he co-leads large-scale upgrades to pretraining data frameworks, driving quality improvements and ablation studies that bridge research experiments and production datasets. His background spans data science and ML roles across Meta, Instagram, game analytics, and academia, giving him a rare combination of production engineering rigor and research sensitivity. Comfortable with deep learning and reinforcement learning workflows, he focuses on scalable, reproducible data processing that directly improves model behavior. Outside of Meta, he has mentored AI students and contributed to university research, reflecting a sustained investment in both applied ML and talent development.
11 years of coding experience
8 years of employment as a software developer
Master's degree, Master's degree at Lehigh UniversityBachelor's degree, Bachelor's degree at Sun Yat-Sen University
Github Skills (11)
wordcloud9
actor-critic6
deep-q-learning6
data-visualization4
ddpg4
tensorflow4
pytorch3
deep-reinforcement-learning3
machine-learning2
crawler1
proximal-policy-optimization1
Programming languages (3)
Github contributions (5)
jacobyxu/squirrel-and-friends
May 2020 - Feb 2021
squirrel and friends in machine learning world.
Contributions:30 commits, 4 PRs, 22 pushes in 9 months
machine-learning
jacobyxu/daily-leetcode
Nov 2019 - Jun 2023
Contributions:63 pushes, 1 branch, 2 comments in 3 years 7 months
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