Zeyi Fan
San Francisco, California, United States
Summary
🤩
Rockstar🎓
Top SchoolZeyi Fan is a seasoned software engineer based in San Francisco with 13 years building scalable infrastructure and CI/CD automation, currently driving execution and cost-model changes for Meta's internal CI. He blends systems-level Rust and C++ expertise—authoring Rust/C++ FFI, rewriting CLIs from Python to Rust, and bringing EdenFS to Windows via the Projected Filesystem API—with deep cross-platform build and test automation experience across high-profile open-source projects like folly, katran, proxygen and more. He architected real-time inference infrastructure and an end-to-end GPT stack for Meta’s Metamate product, including a Chrome integration and a RAG-enabled retrieval layer. An active Rustacean and prolific contributor to Facebook’s OSS ecosystem, he focuses on hardening flaky tests, fixing platform-specific build issues, and making complex build pipelines fast and reliable.
14 years of coding experience
6 years of employment as a software developer
San José State University
English
Stackoverflow
2,323reputation
296kreached
3answers
4questions
Github Skills (52)
buildsystem10
git10
github-ci10
c-language10
python10
testing10
windows10
github-actions-workflows10
file-systems10
hacking10
build-system10
file-system10
cmake10
hhvm10
jdeps10
Programming languages (18)
Github contributions (5)
facebook/wangle
Jan 2016 - Oct 2022
Wangle is a framework providing a set of common client/server abstractions for building services in a consistent, modular, and composable way.
Role in this project:
DevOps Engineer & Automation Engineer
DevOps Engineer & Automation EngineerContributions:36 commits, 1 PR, 1 issue in 6 years 9 months
Contributions summary:Zeyi primarily focused on enhancing and maintaining the build and testing infrastructure for the `wangle` repository. Their contributions involved fixing encoding issues in the build process on Windows, improving the `getdeps` build system, and integrating GitHub Actions for CI/CD. The user also implemented features like retrying failed tests and ensuring the correct handling of test results. Additionally, they addressed platform-specific configurations, particularly concerning Python and Boost builds.
client-serverframeworkconsistentcomposablemodular
facebook/sapling
Jun 2018 - Jan 2023
A Scalable, User-Friendly Source Control System.
Role in this project:Back-end Developer
Back-end DeveloperContributions:2 reviews, 432 commits, 4 PRs in 4 years 8 months
Contributions summary:Zeyi primarily worked on the back-end of the source control system. They focused on improving the underlying file storage mechanisms. Their contributions included disabling functionalities that were causing corrupted file content, making modifications to move and copy a proxy hash, and refactoring the codebase to improve readability. The user also made improvements to permission settings.
control-systemscalablesource-controluser-friendly
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