Olli Lupton
Senior Software Engineer at NVIDIA
Switzerland
Summary
🤩
Rockstar🎓
Top SchoolOlli Lupton is a Senior Software Engineer based in Switzerland with 12 years of experience bridging high-performance computing, build systems, and ML infrastructure. Currently at NVIDIA, he brings deep expertise in packaging and release automation—evidenced by contributions to the widely used Spack package manager—and low-level CUDA and build improvements in the JAX ecosystem. With a DPhil from Oxford and an MSci from Cambridge, he combines rigorous academic training with pragmatic engineering that improves distributed initialization, profiling, and reproducible builds. Notably, his work spans both developer tooling (ccache, Perl dependency management) and performance-focused ML compiler integration, making him effective at optimizing developer workflows and runtime stacks.
12 years of coding experience
DPhil / PhD, DPhil / PhD at University of OxfordMSci, MSci at University of Cambridge
Github Skills (23)
c-language10
package-management10
python10
gpu-programming10
cmake10
tensorflow10
performance-optimization10
build-automation10
cuda10
jax10
cprogramming-language10
auto-tuning9
distributed-systems9
deep-learning8
mlops8
Programming languages (10)
Github contributions (5)
jax-ml/jax
Oct 2023 - Feb 2026
Composable transformations of Python+NumPy programs: differentiate, vectorize, JIT to GPU/TPU, and more
Role in this project:
ML Engineer
ML EngineerContributions:18 reviews, 16 PRs, 60 comments in 2 years 4 months
Contributions summary:Olli focused on improving the JAX library, a tool for composable transformations of Python+NumPy programs. Their commits addressed build issues, optimized distributed system initialization, and improved CUDA integration. They also fixed a test and added an option for enhanced integration with PGLE (Persistent Graph Lowering Environment) profiling tools to enhance compilation and performance analysis.
gpujittpujax
spack/spack
Jul 2021 - Feb 2022
A flexible package manager that supports multiple versions, configurations, platforms, and compilers.
Role in this project:Automation Engineer / Build & Release Engineer
Automation Engineer / Build & Release EngineerContributions:3 reviews, 7 commits, 6 PRs in 6 months
Contributions summary:Olli primarily contributed to the Spack package manager by adding and updating package definitions, focusing on the "ccache" and "cuda" packages. They added new versions of ccache and CUDA, including dependencies and configuration details. The user also integrated and updated several Perl dependencies, specifically for C-Reduce.
compilerpackage-managerpythonspackhpc
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