Stephane Sezer
Co-Founder & CTO at Twin Prime
New York City Metropolitan Area United States
Summary
🤩
Rockstar🎓
Top SchoolStephane Sezer is a seasoned software engineer with 17 years of experience building low-level systems, networking software, and developer tools from New York City. He has deep C/C++ and systems expertise demonstrated by contributions to high-profile open-source projects like Facebook's folly, LLDB, and FBOSS, where he optimized URI handling, debugger functionality, and switch firmware integration. His career spans high-frequency trading at Hudson River Trading, core networking at VMware, and seven years at Facebook tackling backend and tooling challenges. He also has a strong background in embedded and security-focused development, having implemented proprietary protocols on constrained chips and worked on Android kernel modules. A former instructor at EPITA, he blends practical engineering with teaching—rewriting kernel programming coursework and mentoring students in assembly and OS internals. Known for pragmatic refactors and performance-minded fixes, he brings a mix of production-grade rigor and low-level curiosity to complex system problems.
17 years of coding experience
13 years of employment as a software developer
Master's degree, Computer Science, Master's degree, Computer Science at EPITA: Ecole d'Ingénieurs en InformatiqueBaccalauréat, Mathematics, Baccalauréat, Mathematics at Lycée Maurice Genevoix
Stackoverflow
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Github Skills (40)
debugging10
javascript10
c-language10
android-adb10
text-manipulation10
linux10
url-parsing10
xcode10
parse10
android10
uri10
build-tools10
url-parser10
thrift10
cprogramming-language10
Programming languages (7)
Github contributions (5)
facebookarchive/xcbuild
Sep 2016 - Jul 2019
Xcode-compatible build tool.
Role in this project:
Backend Developer
Backend DeveloperContributions:25 commits, 36 PRs, 22 pushes in 2 years 10 months
Contributions summary:Stephane primarily focused on bug fixes and code improvements related to the Xcode-compatible build tool. Their contributions addressed issues with Linux builds, including missing includes and compiler compatibility. They also fixed an off-by-one error and made enhancements to preserve the ordering of library search paths. Additionally, the user corrected typos and made adjustments to internal tools.
xcode
llvm-mirror/lldb
Oct 2014 - Aug 2018
Project moved to: https://github.com/llvm/llvm-project
Role in this project:Back-end Developer
Back-end DeveloperContributions:91 commits in 3 years 10 months
Contributions summary:Stephane primarily contributes to the lldb project, focusing on improvements within the debugging and debugging-related tools. Their commits showcase expertise in handling signals, test suite packet checksums, and platform-specific implementations. They also added support for process listing in Linux and made the platform process connect path less verbose.
llvmdebuggerlldbgdb
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