Guillaume Pagnoux
Software Engineer at Datadog
Paris, Ile-de-France
Summary
🤩
Rockstar🎓
Top SchoolGuillaume Pagnoux is a systems-focused software engineer with nine years of experience, currently working on Datadog's core agent where he contributes to network telemetry, protocol classification, and hooking mechanisms for live processes. Based in Paris, he blends low-level C/C++ firmware and kernel experience from roles at Qarnot and EPITA with Go-based backend work at Datadog, giving him rare cross-stack fluency from microcontrollers to cloud monitoring. He has taught operating systems and kernel programming, demonstrating an ability to explain complex OS concepts and mentor others. Notably, his datadog-agent contributions added telemetry for dropped and closed connections and refactored GoTLS hooking to support already-running processes—work that improves observability in production environments. Practical, detail-oriented, and curious, he favors robust, testable implementations and has a track record of redesigning update mechanisms and build systems to simplify long-term maintenance.
9 years of coding experience
3 years of employment as a software developer
Engineer's degree, Computer Science, Engineer's degree, Computer Science at EPITA: Ecole d'Ingénieur en Informatique
English, French
Github Skills (10)
observability10
go10
network-monitoring10
ebpf10
tracer9
trace9
docker4
kubernetes4
dockers4
kubernetes-pods4
Programming languages (10)
Github contributions (5)
DataDog/datadog-agent
Jul 2022 - Jan 2023
Main repository for Datadog Agent
Role in this project:
Back-end Developer
Back-end DeveloperContributions:281 reviews, 94 commits, 118 PRs in 6 months
Contributions summary:Guillaume primarily contributed to the `datadog-agent` repository by implementing and enhancing system-probe functionalities, specifically focusing on network telemetry and protocol classification. Their work involved adding new telemetry metrics for dropped connections, closed connections, and performance events within the system-probe component. Furthermore, the user refactored the GoTLS hooking process, including attaching probes on new processes and adding support for hooking processes already running. They also worked on protocol classification and related supporting infrastructure.
golangdatadog-agentagentobservabilitypmm
Yumasi/nixos-home
Aug 2019 - Feb 2020
Contributions:117 commits, 59 pushes, 3 branches in 5 months
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