Hans Wennborg
Staff Software Engineer at Google
Stockholm, Sweden
Summary
🤩
Rockstar🎓
Top SchoolHans Wennborg is a Staff Software Engineer based in Stockholm with 15 years of experience specializing in compilers, LLVM/Clang, and toolchain engineering. At Google he leads the Chrome C++ Toolchain team and has served as an LLVM release manager, driving platform-wide compiler support and native Windows C++ integration for Chrome. His open-source contributions touch heavyweight projects like Chromium and rust-lang/rust, where he adapted backends to evolving LLVM APIs and maintained critical libraries such as libc++. Beyond code, he blends build/release automation with deep systems knowledge—fixing memory leaks, improving diagnostics, and enabling cross-platform code generation. Quietly prolific, he often resolves subtle ABI/data-layout mismatches and regressions that keep large-scale toolchains reliable for millions of users.
15 years of coding experience
12 years of employment as a software developer
M.Sc., Computer Science and Engineering, M.Sc., Computer Science and Engineering at The Faculty of Engineering at Lund University
Swedish, English, German, French
Github Skills (37)
debugging10
debug10
c-language10
clang-tidy10
back-end-development10
compiler-development10
llvm10
build-system10
cmake10
release-management10
compiler-compiler10
driver10
device-driver10
compiler-optimization10
compiler10
Programming languages (14)
Github contributions (5)
llvm-mirror/libcxx
Aug 2014 - Aug 2019
Project moved to: https://github.com/llvm/llvm-project
Role in this project:
Automation Engineer / Build & Release Engineer
Automation Engineer / Build & Release EngineerContributions:93 commits in 5 years 1 month
Contributions summary:Hans primarily focused on maintaining and updating the libc++ library's build and release processes. Their commits included reverting CMake configuration changes, bumping documentation versions, and updating the release notes with links. The user consistently updated the version numbers in the `docs/conf.py` file, and also updated the release notes and version numbers. These actions indicate a focus on release management and ensuring the library is properly versioned.
llvm
llvm-mirror/clang
Jun 2011 - Oct 2019
Mirror kept for legacy. Moved to https://github.com/llvm/llvm-project
Role in this project:Back-end Developer
Back-end DeveloperContributions:1169 commits in 8 years 5 months
Contributions summary:Hans's contributions focus on addressing issues and improving the Clang compiler. The commits include fixing typos, supporting language features, correcting code generation and mangling issues, adding command-line options, and other incremental improvements to the compiler. The user's work primarily involves code changes related to the compiler's functionality.
keptwindowsllvmcc-plus-plus
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