Rastislav Szabo
Software Engineering Technical Leader at Isovalent
Slovakia
Summary
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Rockstar🎓
Top SchoolRastislav Szabo is a software engineer with 10 years of experience specializing in Kubernetes networking, multi-cloud cluster deployments, and cloud-native infrastructure. He has driven resilience and cross-cloud connectivity features at Kubermatic and now contributes to Isovalent/Cilium work around eBPF-based networking and security. His open-source contributions include enhancements to Kubermatic’s tunneling and cluster access, and BGP control-plane improvements in Cilium and GoBGP—reflecting deep protocol-level networking expertise implemented in Go. Prior roles at PANTHEON.tech saw him lead CNF and container networking projects, bridging SDN, CNI, and microservices architectures. Based in Banská Bystrica, Slovakia, he blends low-level networking protocol work with pragmatic DevOps practices to make multi-cloud Kubernetes more operable. A less obvious strength is his long-term habit of improving test frameworks and API robustness, which boosts reliability across the projects he touches.
10 years of coding experience
19 years of employment as a software developer
Master of Science (MS) Computer and Communication Systems and Networks, Master of Science (MS) Computer and Communication Systems and Networks at Faculty of Informatics and Information Technologies, Slovak University of Technology
English, German
Stackoverflow
61reputation
12kreached
3answers
0questions
Github Skills (33)
kubernetes10
apidoc10
configuration-management10
crc10
networking10
crt10
go10
api10
kubernetes-pods10
bgp10
devops10
testing9
automations8
srv8
automation8
Programming languages (12)
Github contributions (5)
kubermatic/kubermatic
Jan 2021 - Jan 2023
Kubermatic Kubernetes Platform - the Central Kubernetes Management Platform For Any Infrastructure
Role in this project:
Back-end & DevOps Engineer
Back-end & DevOps EngineerContributions:137 reviews, 151 commits, 164 PRs in 2 years
Contributions summary:Rastislav primarily contributed to the Kubermatic Kubernetes Platform by addressing issues related to the "Tunneling expose strategy" and setting up networking configurations. They made code changes in service definition files related to tunnel and API server setup. They also focused on implementing and integrating the features to enhance the management of the user clusters. Additionally, they worked on improving the resilience of the platform and managing cluster access policies.
kubernetescluster-apikubermatic-kubernetes-platform
cilium/cilium
Feb 2019 - Jul 2026
eBPF-based Networking, Security, and Observability
Role in this project:Backend & DevOps Engineer
Backend & DevOps EngineerContributions:475 reviews, 170 PRs, 19 pushes in 7 years 6 months
Contributions summary:Rastislav's contributions focused on enhancing the Cilium BGP control plane, primarily through modifications to the CiliumBGPNeighbor CRD. The user extended the CRD with options for configuring BGP timer parameters and eBGP multihop TTL values, as well as adding support for route policy. They also implemented unit tests for the BGP CRD types and improved the BGP testing framework, enhancing test reliability and coverage. The work included several fixes related to API endpoint handling when the BGP Control Plane is disabled.
ebpfnetworkingobservabilitysecuritycontainers
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