Savannah Ostrowski
Seattle, Washington, United States
Summary
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RockstarSavannah Ostrowski is a seasoned CPython core developer and Release Manager for Python 3.16 and 3.17 with 11 years of engineering experience, based in Seattle. As a member of the Python Steering Council and a backend contributor at FastAPI Labs, she blends project stewardship with deep technical contributions to the language itself. Her work on the JIT compiler, argument parser fixes, and removing LLVM dependency demonstrates a rare combination of performance-focused systems programming and cross-platform build/tooling expertise. She also maintains and authors PEP documentation, ensuring that design decisions are both technically sound and clearly communicated to the community. Known for quietly tackling thorny build and documentation issues, she helps keep the Python ecosystem robust for millions of users and downstream projects.
11 years of coding experience
Stackoverflow
151reputation
25kreached
1answer
0questions
Github Skills (15)
pep10
jit10
argument-parsing10
python10
compile10
documentation10
llvm10
c119
performance-optimization9
c179
build-system8
visual-studio-code6
pylance6
githubaction-workflow5
github-ci5
Programming languages (22)
Github contributions (5)
python/cpython
Feb 2021 - Jun 2026
The Python programming language
Role in this project:
Back-end Developer
Back-end DeveloperContributions:273 reviews, 165 PRs, 75 pushes in 5 years 4 months
Contributions summary:Savannah contributed to the Python core, specifically focusing on the JIT (Just-In-Time) compiler and the argument parser. They implemented optimizations for constant comparisons within the JIT, and modified the code to update JIT-related features and include LLVM version 19. The user also fixed a bug with the argument parser. Furthermore, the user addressed several build and documentation issues related to the JIT and argument parser.
programming-languagepython
python/peps
Jun 2024 - May 2026
Python Enhancement Proposals
Role in this project:Back-end Developer & Technical Writer
Back-end Developer & Technical WriterContributions:11 reviews, 17 PRs, 6 pushes in 1 year 11 months
Contributions summary:Savannah primarily contributed to Python Enhancement Proposals (PEPs), focusing on the JIT compilation feature for CPython. Their work involved updating PEP documentation, fixing typos, updating author information, and adding post-history information. They also contributed to the removal of the LLVM dependency for JIT builds, which included creating and managing stencil files for various platforms.
python
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