Paul Chaignon
Senior Staff Software Engineer at Isovalent
Rennes, Brittany, France
Summary
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Rockstar🎓
Top SchoolPaul Chaignon is a Senior Staff Software Engineer with 12 years’ experience specializing in eBPF, Linux networking, and systems security, currently leading datapath features at Isovalent such as encryption, policy enforcement, and egress gateways. He has driven high-scale Cilium features—SRv6 L3VPN implementation and support for millions of pods in clustermesh—and previously led SRv6 & BGP efforts. A longtime open-source contributor since 2014, Paul has made substantive backend contributions to projects like cilium, bcc, syzkaller and strace, and maintains language heuristics in github-linguist. His background blends research (fuzzing BPF verifiers at Orange Labs) with production engineering and incident response, giving him a rare fluency across verifier internals, kernel interactions, and practical datapath constraints. Based in Rennes, France, he regularly publishes benchmarks, verifier studies and conference coverage, signaling both deep technical craft and an active community presence.
12 years of coding experience
7 years of employment as a software developer
Exchange student in Computing Security, 4.0/4.0, Exchange student in Computing Security, 4.0/4.0 at Rochester Institute of TechnologyMaster of Science (MS), Computer Science, Master of Science (MS), Computer Science at INSA de RennesPh.D., Ph.D. at Universite de Lorraine
English, French
Stackoverflow
12,212reputation
582kreached
377answers
0questions
latex
top-5%
github
top-5%
linux-kernel
top-5%
trace
top-5%
linux
top-5%
Github Skills (48)
atom-editor10
debugging10
debug10
javascript10
system-programming10
coffeescript10
python10
ebpf10
testing10
packet10
c1110
linux-kernel10
bpf10
c1710
kernel10
Programming languages (34)
Github contributions (5)
cilium/cilium
Dec 2022 - Dec 2022
eBPF-based Networking, Security, and Observability
Role in this project:
Backend Developer
Backend DeveloperContributions:3501 reviews, 1 commit, 1908 PRs in 1 day
Contributions summary:Paul primarily contributed to the documentation and maintenance aspects of the Cilium project, particularly concerning network-related features. Their work involved fixing code blocks in getting started guides and troubleshooting documentation. Additionally, the user fixed broken links and updated documentation to reflect changes in the code or project structure, ensuring that the documentation was up-to-date and accurate. Furthermore, the user worked on ensuring documentation consistency, fixing typos, and adding explanations.
bpfcontainerskerneltroubleshootingkubernetes-networking
github-linguist/linguist
Feb 2014 - Nov 2019
Language Savant. If your repository's language is being reported incorrectly, send us a pull request!
Role in this project:Backend Developer & Language Maintainer
Backend Developer & Language MaintainerContributions:18 reviews, 390 commits, 315 PRs in 5 years 10 months
Contributions summary:Paul contributed to the linguist repository by implementing support for new file extensions and improving existing heuristics for language detection. The contributions included adding support for the ".ecl" and ".pro" file extensions for Prolog, and the ".sld" extension for Scheme. The user also updated existing heuristic rules and test cases to improve accuracy and address merge conflicts. These contributions indicate an active role in maintaining and improving the library's language recognition capabilities.
linguisticlanguage-grammarslanguage-statisticspull-requestrequest
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