Igor Klemenski
Software Engineer at Meta
Seattle, Washington, United States
Summary
🤩
Rockstar🎓
Top SchoolIgor Klemenski is a seasoned software engineer with 11 years of experience building cloud-native networking and developer-facing systems, now working on datacenter networking at Meta. He brings deep systems expertise across eBPF, TCP/IP datapaths, Windows kernel networking and observability tooling from multiple roles at Microsoft and contributions to high-profile open-source projects like Cilium and React Native for Windows. Comfortable across the stack, Igor has shipped CLI features, UI/accessibility fixes, dynamic metric processing, and nightly build integrations—demonstrating both low-level kernel work and frontend polish. Based in Seattle, he combines a formal computer science background from Warsaw University of Technology and Universidad Carlos III de Madrid with hands-on production experience at hyperscalers. Notably, he has implemented dynamic metric registration and configuration reloading for Hubble and added remote-debugging support to RNW's CLI, highlighting a knack for shrinking developer friction.
10 years of coding experience
7 years of employment as a software developer
Charles III University of Madrid (Universidad Carlos III de Madrid)BEng Computer Science, BEng Computer Science at Warsaw University of TechnologyHigh School Mathematics & Physics, High School Mathematics & Physics at III Liceum Ogólnokształcące, Gdynia
English, Italian, Polish, Spanish
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (24)
kubernetes10
javascript10
observability10
ebpf10
networking10
go10
prometheus10
kubernetes-pods10
metric10
react-native9
container9
c-language9
bpf9
windows9
devops9
Programming languages (12)
Github contributions (5)
microsoft/react-native-windows
May 2020 - Nov 2021
A framework for building native Windows apps with React.
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:216 reviews, 55 commits, 119 PRs in 1 year 5 months
Contributions summary:Igor primarily contributed to the React Native Windows framework, making changes to both the front-end and back-end components. They focused on implementing features like the `--remote-debugging` flag in the CLI, as well as fixing UI bugs related to text rendering and accessibility. The user also integrated nightly builds, demonstrating an ability to work with and update the framework.
dotnetreactuwpxboxwindows
cilium/cilium
Jul 2024 - Mar 2025
eBPF-based Networking, Security, and Observability
Role in this project:Back-end & DevOps Engineer
Back-end & DevOps EngineerContributions:70 reviews, 16 PRs, 159 comments in 7 months
Contributions summary:Igor primarily focused on enhancing the Hubble metrics server within the Cilium project. Their contributions include the addition of dynamic metric registration and configuration reloading, involving the creation of a dynamic flow processor and a metric configuration watcher. The user also implemented tests for metrics and improved the exporter functionality. Furthermore, the user added flags and documentation, and fixed a bug related to metrics removal after pod deletion.
bpfcontainerskerneltroubleshootingkubernetes-networking
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