Sergiusz Urbaniak - Staff Software Engineer at Defense Unicorns

Sergiusz Urbaniak

Staff Software Engineer at Defense Unicorns

Berlin Metropolitan Area Germany

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Summary

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Rockstar

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Top School

Sergiusz 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

17 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 Szczecin

Dipl. 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)

JavaC++CRustMakefileScalaGoMustache

Github contributions (5)

kube-rbac-proxy/kube-rbac-proxy

Feb 2019 - Aug 2022

Kubernetes RBAC authorizing HTTP proxy for a single upstream.

Role in this project:

DevOps Engineer

Contributions:6 releases, 78 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.

http-proxykubernetes-rbac

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

Contributions: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.

prometheusk8s-sig-instrumentation

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