Phitchaya Phothilimthana
Member Of Technical Staff at OpenAI
Mountain View, California, United States
Summary
👤
Senior🎓
Top SchoolPhitchaya Phothilimthana is a hardware-software co-design engineer with 13 years of experience building efficient compilers and systems for emerging architectures, now a Member of Technical Staff at OpenAI after six years as a Research Scientist at Google. He brings deep compiler expertise from a Berkeley Ph.D. focused on generating efficient code for radical architectures and has contributed to high-impact open-source work on XLA—fixing nondeterminism, improving memory tracking, and optimizing instruction fusion for ML accelerators. His career blends rigorous research internships (NVIDIA, Microsoft, Qualcomm) with production-facing improvements, evidencing a knack for turning advanced analysis into pragmatic tooling. Based in Mountain View, he pairs low-level systems thinking with a practical orientation toward robustness and deterministic behavior that benefits large-scale ML compilation pipelines.
13 years of coding experience
6 years of employment as a software developer
University of California, BerkeleyBachelor of Science (BS) Computer Science, Bachelor of Science (BS) Computer Science at Massachusetts Institute of Technology
Thai, English, Chinese
Github Skills (7)
xla10
compiler-design10
c-language10
cprogramming-language10
operation10
linear-algebra10
hla10
Programming languages (4)
Github contributions (5)
openxla/xla
Jul 2020 - Jan 2023
A machine learning compiler for GPUs, CPUs, and ML accelerators
Role in this project:
Back-end Developer
Back-end DeveloperContributions:26 commits in 2 years 6 months
Contributions summary:Phitchaya primarily contributed to improving the XLA compiler's functionality and robustness. They fixed fingerprint mismatch issues, ensuring deterministic behavior in the compilation process. They made code modifications related to memory usage tracking and instruction fusion, enhancing the efficiency of the compilation pipeline. Additionally, they implemented improvements for while loop bounds analysis and incorporated code for handling infeed/outfeed configurations.
compilercommunity-drivenmachine-learningmodular
mangpo/greenthumb
Feb 2014 - Jun 2022
Contributions:3 releases, 700 commits, 8 PRs in 8 years 5 months
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