Michał Gregorczyk
Software Engineer at Meta
Warsaw, Masovian Voivodeship, Poland
Summary
🤩
Rockstar🎓
Top SchoolMichał Gregorczyk is a seasoned software engineer with 12 years of experience building low-level, performance-sensitive systems and tooling, currently based in Warsaw and working at Meta. He has a strong track record at major tech firms (Facebook/Meta, Google) and deep open-source contributions to high-profile projects like bpftrace, BCC, React Native, Redex and Fresco, focusing on kernel interaction, Android runtime improvements, bytecode optimization and memory management. His work often sits at the intersection of systems and mobile engineering—fixing kernel compatibility, enhancing symbol resolution for BPF tools, and improving Android bytecode/tooling and JSC integration for React Native. A Master’s graduate in Computer Science from the University of Warsaw, he combines academic rigor with practical cross-platform debugging and build expertise, including non-obvious experience adapting tooling for Android and embedded environments.
12 years of coding experience
8 years of employment as a software developer
Master's degree, Computer Science, Master's degree, Computer Science at University of Warsaw
Polish, English
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (37)
debugging10
code-optimization10
debug10
javascript10
c-language10
mobile-development10
react-native10
ebpf10
image-processing10
llvm10
memory-management10
javascriptcore10
c1110
linux-kernel10
android-development10
Programming languages (7)
Github contributions (5)
bpftrace/bpftrace
Mar 2019 - Nov 2022
High-level tracing language for Linux
Role in this project:
Back-end Developer & Systems Engineer
Back-end Developer & Systems EngineerContributions:2 reviews, 10 commits, 8 PRs in 3 years 7 months
Contributions summary:Michał primarily contributed to the core functionality of bpftrace, focusing on low-level system interactions. They addressed kernel version compatibility issues, ensuring the tool works across various Linux distributions. The user also improved code generation, specifically addressing issues related to string literals and llvm integration. Moreover, they worked on build and runtime environment compatibility, making adjustments for Android devices.
bpfbccebpftracingtracepoints
iovisor/bcc
Aug 2019 - Nov 2022
BCC - Tools for BPF-based Linux IO analysis, networking, monitoring, and more
Role in this project:Back-end Developer
Back-end DeveloperContributions:9 reviews, 13 commits, 10 PRs in 3 years 3 months
Contributions summary:Michał focused on improving the debugging and symbol resolution capabilities of the BCC tools, a BPF-based Linux IO analysis project. They implemented support for looking up debug information using symfs, build IDs, and debug link sections, improving compatibility with Android and other systems. Additionally, they refactored and enhanced the code to handle zip archives and mini debug info files, extending the tools' ability to work with compressed and embedded ELF files. Furthermore, they introduced code that parses zip archives and integrates them into the symbol resolution process.
bpfbcclinuxnetworkingebpf
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