Francis Mistrih
Software Engineer at Meta
San Francisco, California, United States
Summary
🤩
Rockstar🎓
Top SchoolFrancis Mistrih is a software engineer with 12 years of deep experience in compilers, LLVM, and low-level tooling, now working on compilers for Meta’s MTIA accelerator after leading LLVM-based accelerator compiler efforts at Apple. He specializes in backend code generation, optimization, and hardware/software co-design to improve performance and power for linear algebra workloads across CPUs and accelerators. His open-source contributions include fixes and feature work in high-profile projects like clang and swift-llvm/swift-clang, touching driver logic, MIR/X86 codegen, and YAML API integrations. He brings practical systems insight from teaching compiler toolchains and shipping production compiler-assisted optimization remarks into developer workflows. Known for tackling tricky build and codegen breakages, he combines rigorous low-level debugging with cross-disciplinary collaboration among library writers and hardware designers. Based in San Francisco, he blends research-era curiosity with production-grade engineering that moves from LLVM internals to deployed accelerator toolchains.
12 years of coding experience
8 years of employment as a software developer
Computer Science, Computer Science at Ewha Womans UniversityMaster's degree Computer Science, Master's degree Computer Science at EPITABaccalauréat Scientific - Engineering Sciences, Baccalauréat Scientific - Engineering Sciences at Lycée Pilote Innovant International
Romanian, French, English
Github Skills (24)
assembly10
c-language10
llvm10
c1110
x8610
c1710
code-generation10
compiler-compiler10
driver10
cplus10
yaml10
compiler10
cpp10
clangd10
cprogramming-language10
Programming languages (4)
Github contributions (5)
apple/swift-llvm
May 2017 - Aug 2019
Role in this project:
Back-end Developer
Back-end DeveloperContributions:48 commits, 40 pushes in 2 years 3 months
Contributions summary:Francis primarily contributed to the LLVM project, focusing on code generation and optimization. Their work involved enhancing the shrink-wrapping mechanism to handle no-return paths, adding support for missing CFI directives in MIR, and adding address space support in MIR. They also addressed a bug related to incorrect encoding of rip-relative addressing and immediate displacements in X86.
apple/swift-clang
Dec 2017 - Oct 2019
Role in this project:Backend Developer
Backend DeveloperContributions:13 commits, 10 pushes in 1 year 9 months
Contributions summary:Francis primarily focused on fixing and updating the YAML API usage within the `swift-clang` repository, as indicated by multiple commits addressing code changes related to YAML API integration. The user also addressed missing initializations within the pretty printer, showing involvement in AST-related components. Furthermore, the user merged branches and resolved conflicts, contributing to code maintenance and integration efforts. They also worked on driver-related changes related to architecture configurations.
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