Sergiusz Urbaniak
Staff Software Engineer at MongoDB
Berlin Metropolitan Area Germany
Summary
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Rockstar🎓
Top SchoolSergiusz Urbaniak is a cloud-native systems expert and engineering lead with 14 years of experience building and operating Kubernetes-based platforms at scale, currently leading the Kubernetes team at MongoDB from Berlin. He combines deep technical ownership — notably architecting a feature-generation pipeline for Kubernetes Operators and shaping the Kubernetes Atlas Operator — with people leadership, mentoring, and cross-functional stakeholder alignment. His open-source footprint spans critical projects across the CNCF ecosystem (Kubernetes, Prometheus Operator, Thanos, rkt, kcp), where he has driven reliability, authz/authn, monitoring, and operator automation improvements. Pragmatic and detail-oriented, he has a knack for uncovering subtle edge cases in large distributed systems and translating them into robust architectural decisions. A frequent speaker at KubeCon and meetups, he pairs hands-on coding and dependency management skills with a clear view of product and operational concerns.
14 years of coding experience
19 years of employment as a software developer
Master of Science (MSc) Computer Science, Master of Science (MSc) Computer Science at West Pomeranian University of Technology in SzczecinDipl. Wirtschaftsinformatiker (FH) Diploma (FH) Business Informatics, Dipl. Wirtschaftsinformatiker (FH) Diploma (FH) Business Informatics at Hochschule für Technik und Wirtschaft Berlin
English, Polish, German
Stackoverflow
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Github Skills (84)
dependency-management10
authorizations10
rkt10
klog10
testing10
alertdialog10
test-framework10
instrumentation10
grafana10
rest-api10
k8s10
concurrency10
operator10
monitoring10
mesos10
Programming languages (20)
Github contributions (5)
kubernetes-sigs/prometheus-adapter
Dec 2018 - Jan 2021
An implementation of the custom.metrics.k8s.io API using Prometheus
Role in this project:
Back-end Developer
Back-end DeveloperContributions:7 releases, 4 reviews, 56 commits in 2 years 1 month
Contributions summary:Sergiusz primarily focused on enhancing the Prometheus adapter's functionality related to authentication and metric retrieval. Their contributions included adding support for bearer tokens for Prometheus authentication, enabling configuration through a file. They also addressed package import issues and replaced glog with klog for logging. Furthermore, the user added non-namespaced resource support, ensuring the adapter correctly handles metrics from different resources.
apicustom-metricsk8s-sig-instrumentationk8skubernetes
brancz/kube-rbac-proxy
Feb 2019 - Aug 2022
Kubernetes RBAC authorizing HTTP proxy for a single upstream.
Role in this project:DevOps Engineer
DevOps EngineerContributions:6 releases, 76 reviews, 64 commits in 3 years 6 months
Contributions summary:Sergiusz primarily contributed to the test infrastructure and deployment aspects of the project. They added features to the kubetest framework, including the ability to dump logs and wait for pods to be gone. Their work also involved increasing the job backoff limit and enabling TLS 1.3 support, which indicates a focus on improving reliability and security. The user also made changes to the Docker build process for multi-architecture support.
proxyrbachttp-proxyupstreamkubernetes
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