Cornelius Keller
DevOps Engineer at Whitebox - Ihre digitale Vermögensverwaltung
Berlin, Germany
Summary
👤
Senior🎓
Top SchoolCornelius Keller is a seasoned DevOps and systems engineer with 13+ years building cloud-native platforms and microservice architectures, specializing in Kubernetes and the CNCF ecosystem. He has a track record of transforming slow, fragile deployment processes into rapid, reliable CI/CD pipelines—from enabling daily zero-downtime releases at bettermarks to creating developer-friendly service templates and observability stacks at Market Logic. At Giant Swarm he combined hands-on engineering (including Go operators) with product ownership for on-prem Kubernetes, and contributed resilience improvements to widely used projects like ceph-container. More recently he architected scalable Kubernetes infrastructure for high-throughput AS4 messaging on Azure and now helps build an on-prem private cloud for German federal institutions. Comfortable across languages and eras—from Perl/PHP/Java in the 90s to Python and modern operator patterns—he’s equally at home coding, automating, and shaping platform strategy. A pragmatic tinkerer, he often surfaces small operational fixes that materially improve reliability in production.
13 years of coding experience
18 years of employment as a software developer
Abitur, Abitur at Freie Waldorfschule MannheimComputer Science, Computer Science at Ludwig-Maximilians-Universität MünchenComputer Science, Computer Science at Humboldt-Universität zu Berlin
English, French, German, Italian, Spanish
Github Skills (17)
kubernetes10
docker10
containerization10
dockers10
automation10
kubernetes-pods10
ceph10
automations10
scripting9
bash9
shell9
script9
sh9
system-administration8
cloud-infrastructure8
Programming languages (10)
Github contributions (5)
ceph/ceph-container
Jan 2016 - Jun 2016
Docker files and images to run Ceph in containers
Role in this project:
DevOps Engineer & System Architect
DevOps Engineer & System ArchitectContributions:11 commits, 1 PR, 14 comments in 5 months
Contributions summary:Cornelius primarily focuses on automating and improving the Ceph container deployment and management process using Kubernetes. Their contributions involve modifying entrypoint scripts to remove zombie monitors and handling unexpected restarts, enhancing the system's resilience. They also integrated Kubernetes support by modifying configuration files and creating scripts for cluster creation and deletion. Furthermore, they optimized the container's startup process.
containersdocker-imagedocker-filesdockerceph
cornelius-keller/cluster-api-provider-hetznercloud
Mar 2020 - May 2020
Contributions:1 release, 17 commits, 6 pushes in 2 months
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