Jan Dupej
Senior DevTech Engineer at Faculty of Science, Charles University, Prague
Prague, Prague, Czechia
Summary
🤩
Rockstar🎓
Top SchoolJan Dupej is a Senior DevTech Engineer based in Prague with a PhD background in computer graphics and over a decade of research and engineering experience spanning geometric morphometrics, mesh registration, and medical volume data processing. He blends academic rigor—co-developing Morphome3cs and publishing on 3D surface correspondence—with practical systems work, from embedded software and AR/VR engines to optimizing the .NET/Mono JIT for ARM64 at Microsoft. Now at NVIDIA, he applies low-level performance tuning and graphics expertise to help developers ship high-performance visualization and compute solutions. A contributor to the high-profile dotnet/runtime project, he has deep experience implementing ARM64 NEON intrinsics and SIMD code generation that quietly accelerates real-world runtimes. His background uniquely couples advanced 3D research with production-grade compiler and runtime optimization skills.
4 years of coding experience
8 years of employment as a software developer
Mgr., Software Systems, Mgr., Software Systems at Univerzita Karlova v PrazeDoctor of Philosophy - PhD, Computer Graphics, Doctor of Philosophy - PhD, Computer Graphics at Charles University
English, German, Slovak
Github Skills (5)
c1710
arm10
assembly10
mono10
c1110
Programming languages (5)
Github contributions (5)
dotnet/runtime
Sep 2022 - Jan 2023
.NET is a cross-platform runtime for cloud, mobile, desktop, and IoT apps.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:107 reviews, 7 commits, 82 PRs in 4 months
Contributions summary:Jan's contributions focused primarily on optimizing the Mono JIT compiler, specifically for the ARM64 architecture. They implemented and refined various NEON (SIMD) opcode encodings, and also added new intrinsics for Vector128 operations, including Convert, Dot, GetElement, WithElement, Widen, and Narrow. Additionally, the user worked on optimizing the loading of 32- and 64-bit immediates and improving code generation for several ARM64 operations.
dotnetiotmobile
jandupej/runtime
Jul 2022 - Oct 2023
Fork of dotnet/runtime.
Contributions:233 pushes, 71 branches in 1 year 3 months
dotnetcsharpruntimedotnet-core
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