Moritz Lehmann
Software Engineer at Intel Corporation
Germany
Summary
🤩
Rockstar🎓
Top SchoolMoritz Lehmann is a GPU-focused software engineer and performance specialist with a PhD in physics, known for creating FluidX3D — an open-source, OpenCL-based lattice Boltzmann CFD solver that outperforms major commercial codes by orders of magnitude while running on virtually any GPU/CPU. Now working at Intel and advising the Khronos Group on OpenCL, he combines deep domain science with self-taught systems programming craft, producing dense, modular, and highly optimized code with near-zero tolerance for bugs. His work spans backend development, turbulence-model improvements, and creative validation setups (including Star Trek Enterprise-E simulations), reflecting both rigor and a playful curiosity for testing edge cases. A summa cum laude graduate and early achiever, he brings rare expertise in squeezing performance from heterogeneous hardware and making high-performance CFD accessible through open source.
4 years of coding experience
0.0 - summa cum laude, 0.0 - summa cum laude at University of Bayreuth
German, English, Latin, Spanish
Stackoverflow
5,191reputation
1.1mreached
247answers
10questions
gpu
top-5%
nvidia
top-5%
Github Skills (18)
opencl10
c-language10
cluster-computing10
parallel-computing10
gpu10
accelerated-computing10
high-performance10
cprogramming-language10
scientific-computing10
performance-optimization9
nvidia9
cuda6
hip6
ieee6
amdgpu6
Programming languages (7)
Github contributions (5)
ProjectPhysX/FluidX3D
Aug 2022 - Jan 2023
The fastest and most memory efficient lattice Boltzmann CFD software, running on all GPUs and CPUs via OpenCL. Free for non-commercial use.
Role in this project:
Back-end Developer & Performance Engineer
Back-end Developer & Performance EngineerContributions:40 releases, 1 review, 56 commits in 5 months
Contributions summary:Moritz focused on optimizing and fixing issues within the lattice Boltzmann CFD software. Their work included a minor bug fix to the benchmark setup, improvements to the Smagorinsky turbulence model, and updates to streamline visualizations. They also introduced new simulation setups, such as the Star Trek Enterprise-E and Stokes drag validation, suggesting an interest in simulating different fluid dynamics scenarios and performance.
openclcfdcomputational-fluid-dynamicsgpugpu-computing
ProjectPhysX/OpenCL-Wrapper
Jan 2022 - Jan 2023
OpenCL is the most powerful programming language ever created. Yet the OpenCL C++ bindings are cumbersome and the code overhead prevents many people from getting started. I created this lightweight OpenCL-Wrapper to greatly simplify OpenCL software development with C++ while keeping functionality and performance.
Contributions:67 commits, 133 pushes, 17 comments in 11 months
cppopenclprogramming-languagegpugpu-acceleration
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