Farzon Lotfi
Software Engineer at Microsoft
United States
Summary
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RockstarFarzon Lotfi is a Principal-level software engineer based in Atlanta with 13 years of experience specializing in compiler back-end development for graphics and shading languages. He contributes to the widely used LLVM project, having implemented HLSL intrinsics (e.g., all, distance, tan), DXIL backend integrations, vector operations, and critical bug fixes that strengthen DirectX code generation. Farzon blends deep systems-level expertise with pragmatic engineering, focusing on reliable, performant code generation for real-time graphics. Colleagues value his ability to translate complex language semantics into maintainable compiler transforms, and his open-source work shows a commitment to improving a core industry toolchain.
13 years of coding experience
Github Skills (9)
hlsl10
intrinsics10
dx10
dxc10
llvm10
cprogramming-language9
code-generation9
c-language9
spirv7
Programming languages (24)
Github contributions (5)
llvm/llvm-project
Feb 2023 - Jul 2026
The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1394 reviews, 307 PRs, 159 pushes in 3 years 5 months
Contributions summary:Farzon focused on enhancing the LLVM Project's HLSL (High-Level Shading Language) code generation capabilities. Their contributions include implementing various HLSL intrinsics such as `all`, `distance`, and `tan`, and integrating them with the DXIL backend. Furthermore, the user addressed bugs and added support for vector operations. These changes improved HLSL code generation and functionality within the DirectX ecosystem.
compilerllvmtoolchain
IOT-1day-discovery/packageparserweb
Feb 2019 - Aug 2023
Contributions:16 PRs, 17 pushes, 1 branch in 4 years 6 months
mononancydot-net
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