Mateusz Kossakowski
Inżynier Ds. Oprogramowania at EXATEL
Warsaw, Masovian Voivodeship, Poland
Summary
👤
Senior🎓
Top SchoolMateusz Kossakowski is a software engineer based in Warsaw with eight years of experience building and leading R&D projects in programmable dataplanes and network processing. He has deep hands-on expertise with P4, Tofino, eBPF and systems tools (Open vSwitch, Docker, Kubernetes) and is fluent in C, C++, Python and Go. At Orange he progressed to project leadership driving P4-based research, and his open-source contributions include significant eBPF backend work for the widely used p4c compiler—adding packet parsing primitives and externs like checksums, hashes and meters. Currently at EXATEL, he blends low-level networking knowledge with cloud-native tooling to deliver pragmatic, production-ready solutions. An MSc graduate of Warsaw University of Technology, he pairs research-grade protocol understanding with practical delivery experience across telecom and enterprise systems.
8 years of coding experience
2 years of employment as a software developer
Master of Science (MSc) Information and Communication Technology (ICT), Master of Science (MSc) Information and Communication Technology (ICT) at Warsaw University of Technology
French, Russian, English
Github Skills (13)
p4v10
compiler-design10
p4a10
p4lang10
p4api10
ebpf10
networking9
checksum9
checker9
algorithm9
hash-algorithm9
c-language8
cprogramming-language8
Programming languages (4)
Github contributions (5)
p4lang/p4c
Mar 2022 - May 2022
P4_16 reference compiler
Role in this project:
Backend Developer
Backend DeveloperContributions:12 reviews, 9 commits, 11 PRs in 2 months
Contributions summary:Mateusz primarily contributed to the eBPF backend of the P4 compiler. Their work involved adding and improving support for packet parsing, including the `packet_in.length()` and `packet_in.advance()` methods. They also added support for Checksum, CRC16/32, InternetChecksum, Hash and Meter externs, significantly expanding the eBPF backend's capabilities. This demonstrates a focus on extending the compiler's target support and improving its ability to generate code for network processing.
compilerp4p4cp4languagep4lang
kmateuszssak/p4c
Mar 2022 - Jun 2022
P4_16 reference compiler
Contributions:7 reviews, 16 PRs, 96 pushes in 3 months
compiler
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