Patrick Callier
Senior Applied Scientist at Etsy
Palo Alto, California, United States
Summary
👤
Senior🎓
Top SchoolPatrick Callier is a Senior Applied Scientist in Palo Alto with 13 years of experience applying research-grade machine learning to real-world problems across computer vision, NLP, acoustics, and risk modeling. With a PhD in Linguistics and a background in social science, he brings uncommon strengths in language, multimodal signal processing, and human-centered measurement to ML productization. His work spans prototyping deep learning systems (from handwriting attribution and document similarity to sentiment and inactivity prediction) through deployment at companies like In-Q-Tel, Square, and Etsy. He combines experimental rigor from academia with pragmatic engineering—building preprocessing pipelines, web frontends, and production-ready models—to bridge research and applied outcomes. Colleagues rely on his ability to translate complex literature into effective, deployable solutions that address noisy, real-world data.
13 years of coding experience
7 years of employment as a software developer
Ph.D., Linguistics, Ph.D., Linguistics at Georgetown UniversityBachelor of Arts (B.A.), Linguistics, Bachelor of Arts (B.A.), Linguistics at Stanford University
Chinese, French, English
Github Skills (29)
pytorch10
python10
data-science10
machine-learning10
deep-learning10
tensorflow10
jax10
algorithms9
toolkits9
sentiment-analysis9
scientific-computing8
supervised-learning8
novelty-detection8
scipy8
neon7
Programming languages (4)
Github contributions (5)
Lab41/pythia
May 2016 - Sep 2016
Supervised learning for novelty detection in text
Contributions:96 commits, 77 PRs, 86 pushes in 4 months
novelty-detectionsupervised-learning
pcallier/pythia
May 2016 - Oct 2016
Contributions:1 PR, 113 pushes, 78 branches in 5 months
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.