Dennis Geiselmann
DevOps Engineer at SAP
Heidelberg, Baden-Württemberg, Germany
Summary
🤩
Rockstar🎓
Top SchoolDennis Geiselmann is a DevOps engineer based in Heidelberg with six years of experience building and maintaining cloud-native test and telemetry infrastructure. He has hands-on experience at SAP and SAP Signavio, contributing to CI/CD, k3d-based test environments, and telemetry tooling within the Kyma open-source project. His work on Fluent Bit, the Telemetry Operator, and LogPipeline CRDs shows a practical focus on reliable log collection and reducing Prometheus resource footprints. Dennis combines vocational training and advanced studies in computer science (including MSc work at Heidelberg and Politecnico di Milano) with production engineering practice. He’s comfortable optimizing cluster provisioning and compatibility for developer tooling, and his contributions reveal a preference for improving testing efficiency and observability rather than only feature work. Colleagues can expect a pragmatic engineer who bridges academic rigor and operational reliability in Kubernetes-centric ecosystems.
6 years of coding experience
3 years of employment as a software developer
Bachelor of Science - BS Informatik, Bachelor of Science - BS Informatik at Baden-Wuerttemberg Cooperative State University (DHBW)Master of Science - MS Data and Computer Science, Master of Science - MS Data and Computer Science at Heidelberg UniversityMaster of Science - MS Computer Science, Master of Science - MS Computer Science at Politecnico di Milano
Github Skills (14)
fluent-bit10
kubernetes10
bash10
docker10
go10
cloud-native10
telemetry10
dockers10
cicd10
kubernetes-pods10
testing10
githubaction-workflow9
github-ci9
prometheus9
Programming languages (4)
Github contributions (5)
kyma-project/kyma
Jan 2022 - Aug 2022
Kyma is an opinionated set of Kubernetes-based modular building blocks, including all necessary capabilities to develop and run enterprise-grade cloud-native applications.
Role in this project:
DevOps Engineer
DevOps EngineerContributions:75 reviews, 36 commits, 52 PRs in 7 months
Contributions summary:Dennis primarily contributed to the telemetry operator within the Kyma project, focusing on the configuration and management of Fluent Bit for log collection. Their work included modifying and updating the Telemetry Operator, specifically the LogPipeline CRD, and syncing the Fluent Bit configuration. They also made changes to test environments, and overall refactoring of the project to optimize the resource footprint of the Prometheus metrics.
flexibledevopscloud-foundryopenui5sap-hana
kyma-project/test-infra
Oct 2021 - Mar 2022
Role in this project:DevOps Engineer
DevOps EngineerContributions:2 reviews, 9 commits, 30 PRs in 5 months
Contributions summary:Dennis's contributions primarily revolved around the infrastructure and testing aspects of the Kyma project. The user updated and managed the k3d version used for testing, configured and modified CI/CD jobs, and integrated telemetry tests. They also focused on streamlining the testing environment, including changes related to dependencies and cluster provisioning, and adjusting compatibility configurations for the Kyma CLI.
test-kitchenkymatest-infrastructuretestinginfrastructure
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