Valentin Clement
Senior Compiler Engineer at NVIDIA
Hillsboro, Oregon, United States
Summary
🤩
Rockstar🎓
Top SchoolValentin Clement is a Senior Compiler Engineer with 15 years of experience specializing in compilers, parallel and distributed computing, and programming language development, currently driving LLVM/Flang and CUDA/OpenACC work at NVIDIA from Hillsboro, Oregon. He has deep hands-on expertise in Fortran compiler toolchains—notably contributing CUDA Fortran support in LLVM’s flang and implementing OpenACC parsing, MLIR dialects, and lowering pipelines. Valentin previously led the CLAW source-to-source Fortran compiler effort for performance portability on HPC architectures and helped design an OpenACC MLIR dialect at Oak Ridge and ETH Zurich. His contributions to high-profile open-source projects like llvm-project and spack demonstrate a rare blend of low-level compiler implementation and practical packaging/integration skills. He combines research-grade language design with production-focused engineering, enabling scientists to target CPU/GPU hybrids without rewriting domain code. Colleagues rely on him for solving tricky device-memory, kernel-launch, and polymorphic-entity challenges that bridge compiler theory and large-scale HPC practice.
15 years of coding experience
11 years of employment as a software developer
Master Information Technologies, Master Information Technologies at University of applied science of western SwitzerlandFederal Certificate of Capacity + Professional Maturity Comptuer Science, Federal Certificate of Capacity + Professional Maturity Comptuer Science at Ecole des métiers FribourgMaster Information Technology, Master Information Technology at Waseda UniversityBachelor Information Technology, Bachelor Information Technology at College of Engineering and Architecture of Fribourg, SwitzerlandBachelor Thesis Computer Science, Bachelor Thesis Computer Science at University of Technology, Ho Chi Minhh City, Vietnam
French, English, German, Japanese
Github Skills (10)
fortran10
package-management10
compiler-development10
llvm9
mlr9
build-tools9
cmake9
scientific-computing8
python8
openmp6
Programming languages (10)
Github contributions (5)
llvm/llvm-project
Jan 2023 - Jan 2023
The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:710 reviews, 13 commits, 886 PRs in 6 days
Contributions summary:Valentin primarily focused on contributing to the CUDA Fortran compiler, flang, by implementing and extending its features for CUDA support. Their contributions centered around enhancing the compiler's capabilities in handling device-side memory allocation, data transfer, and kernel launches, adding support for features like the UNIFIED attribute and specialized allocators. The user implemented various functionalities to enable the use of CUDA device code. Their work improved the usability and functionality of CUDA Fortran.
compilerstechnologiesclangsubmittoolchain
spack/spack
Oct 2018 - Jul 2020
A flexible package manager that supports multiple versions, configurations, platforms, and compilers.
Role in this project:Back-end Developer
Back-end DeveloperContributions:9 reviews, 8 commits, 10 PRs in 1 year 10 months
Contributions summary:Valentin primarily contributed to the `claw` package within the Spack package manager. Their work involved adding new versions of the CLAW compiler, as well as updating existing versions. Furthermore, the user made modifications to the package's configuration, including specifying compiler flags and dependencies. The contributions focused on integrating the CLAW compiler within the Spack ecosystem.
compilerspythonradiussplatformslinux
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