Igor Kirillov
Senior Software Engineer at Arm
Manchester, England, United Kingdom
Summary
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Rockstar🎓
Top SchoolIgor Kirillov is a Senior Software Engineer based in Manchester with nine years of experience specializing in compilers, binary analysis, and security tooling. He has contributed production-grade optimizations to LLVM for AArch64 and improved dynamic binary analysis and decompilation tooling—work that spans Triton and an IDA Pro Hex-Rays plugin—demonstrating deep expertise in low-level code generation and reverse engineering. At Arm and previously at Huawei and Digital Security he focused on making compiler passes and decompilation more correct and performant, including type-shrinking, zext propagation, and virtual table recovery. Igor combines a mathematics-and-computer-science foundation with practical system-level engineering, and his open-source contributions reveal a preference for algorithmic refactors and performance-sensitive fixes rather than surface-level features.
10 years of coding experience
5 years of employment as a software developer
Bachelor's degree, Mathematics and Computer Science, Bachelor's degree, Mathematics and Computer Science at Peter the Great St.Petersburg Polytechnic University
Github Skills (26)
algorithm10
algorithms10
assembly10
c-language10
python10
abstract-syntax-tree10
plugin-development10
vectorization10
semantics10
binarydiff10
data-structure10
plugin10
semantic10
ida10
assemble10
Programming languages (6)
Github contributions (5)
igogo-x86/HexRaysPyTools
Jul 2016 - Jan 2020
IDA Pro plugin which improves work with HexRays decompiler and helps in process of reconstruction structures and classes
Role in this project:
Back-end Developer
Back-end DeveloperContributions:145 commits, 21 PRs, 79 pushes in 3 years 6 months
Contributions summary:Igor made several contributions to improve the HexRaysPyTools plugin, focusing on enhancing the decompiler's capabilities and adding new features. They implemented new code to scan and identify virtual tables and their methods. Further improvements included adding support for various features, like creating new fields. These changes suggest a strong focus on modifying the plugin's functionality to better analyze and interact with disassembled code.
decompileridaidapythonida-pluginhex-rays-decompiler
llvm/llvm-project
Nov 2021 - Jun 2026
The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.
Role in this project:Back-end Developer & Compiler Optimization Engineer
Back-end Developer & Compiler Optimization EngineerContributions:72 reviews, 42 PRs, 50 pushes in 4 years 8 months
Contributions summary:Igor primarily focused on optimizing the LLVM compiler's code generation process for the AArch64 architecture. Their contributions involved preventing the generation of suboptimal instructions, such as the `tbl` instruction, in favor of more efficient alternatives like `smull`. They implemented type shrinking and zext propagation strategies to improve code efficiency for fixed-width vector types within the LLVM compiler framework. Additionally, the user addressed and resolved bugs related to the vector combine optimization and select optimization passes within the compiler, ensuring correct code generation.
compilerllvmtoolchain
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