Ondrej Blazek
SW Engineer (Go) at Seznam.cz
Brno, Southeast, Czechia
Summary
🤩
Rockstar🎓
Top SchoolOndrej Blazek is a pragmatic software engineer with a decade of experience building cloud-native networking and security tooling, currently focused on Go-based systems at Seznam.cz. He designs and implements eBPF/XDP firewalls and rate limiters, contributes to Cilium-based ACL and OpenStack integration, and writes Kubernetes controllers and control-plane services for Envoy. His background spans low-level packet processing (DPDK, Open vSwitch) to deployment automation and observability (Prometheus, Grafana, Ansible), giving him rare end-to-end visibility into networked systems. Comfortable in both Python and C as well as Go, he blends systems programming instincts with production-ready service design. Based in Brno, he combines telecoms/NOC operational experience with academic grounding in teleinformatics and communications, which shows up in his focus on performant, reliable load‑balancing and eBPF projects.
10 years of coding experience
2 years of employment as a software developer
Bachelor's degree, Teleinformatics, Bachelor's degree, Teleinformatics at Brno University of TechnologyComputer Science, Computer Science at Graz University of Technology
Czech, english (c1), german (a2)
Github Skills (92)
ebpf10
proxy10
accelerator10
bpf10
security10
k8s10
monitoring10
kubernetes-networking10
overleaf10
sharelatex10
latex10
resume10
job-application10
high-performance10
kubernetes10
Programming languages (7)
Github contributions (5)
oblazek/cilium
Apr 2021 - Mar 2025
eBPF-based Networking, Security, and Observability
Contributions:202 pushes, 26 branches in 3 years 11 months
securityebpfnetworkingobservabilitykubernetes
oblazek/Awesome-CV
Feb 2016 - Feb 2017
Contributions:23 pushes, 1 branch in 1 year
latex-templatecv-latextemplatelatex
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