Clément Courbet
Staff Software Engineer at Google
Paris, Ile-de-France
Summary
🤩
Rockstar🎓
Top SchoolClément Courbet is a Staff Software Engineer based in Paris with 13 years of experience building and improving compilers, static analysis tools, and performance-critical systems. At Google since 2012, he focuses on backend engineering with deep expertise in LLVM/Clang, clang-tidy, and D and LDC compilers, contributing practical AST matchers, diagnostics, and refactorings that improve code analysis and transformations. His work spans dependency and build maintenance (e.g., GLPK integration into OR-Tools) to low-level optimizations in projects like Netflix VMAF, showing a blend of compiler theory and pragmatic engineering. Clément holds a PhD in Applied Mathematics and an MSc in Electrical and Electronics Engineering from Ecole centrale de Paris, reflecting a strong theoretical foundation that he applies to real-world tooling. Notably, he repeatedly contributes focused tests and bug fixes that uncover subtle language and runtime edge cases, demonstrating a knack for making complex systems more robust and maintainable.
13 years of coding experience
Doctor of Philosophy (PhD), Applied Mathematics, Doctor of Philosophy (PhD), Applied Mathematics at Ecole centrale de Paris
Github Skills (43)
astm10
parserator10
matcher10
programming-language10
parser10
c-language10
clang-tidy10
llvm10
testing10
c1110
dword10
combinatorial-optimization10
c1710
type-system10
code-analysis10
Programming languages (10)
Github contributions (5)
llvm/llvm-project
Nov 2019 - Mar 2025
The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:251 reviews, 51 PRs, 103 pushes in 5 years 5 months
Contributions summary:Clément primarily contributed to improving the clang-tidy tool within the LLVM project. Their work involved enhancing the `doesNotMutateObject` checker to handle more complex scenarios, particularly those involving const/non-const overloads of member functions and operators. They also fixed a bug in `performance-unnecessary-copy-init` and introduced a new range selector `constructExprArgs` for the clang transformer. Furthermore, the user refactored and improved various parts of the codebase, including the `unnecessary-value-param` and `reorder-fields` checks.
compilerstechnologiesclangsubmittoolchain
llvm-mirror/clang-tools-extra
Jul 2016 - Jun 2019
Mirror kept for legacy. Moved to https://github.com/llvm/llvm-project
Role in this project:Software Engineer (Clang-Tidy)
Software Engineer (Clang-Tidy)Contributions:11 commits in 2 years 11 months
Contributions summary:Clément primarily contributes to the `clang-tools-extra` repository, focusing on developing and refining clang-tidy checks. Their work involves implementing new checks, specifically for the C++ Core Guidelines, and fixing bugs related to existing checks. The contributions also include improvements to existing checks, such as refining diagnostic messages and adjusting the checks to better match expected behavior. They also work on related files like test cases for these checks.
keptwindowsllvm
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