Steffen Karlsson
Lead & Hiring Manager, FWD Engineering at Corti
Copenhagen, Capital Region of Denmark
Summary
👤
Senior🎓
Top SchoolSteffen Karlsson is a Lead and Hiring Manager at Corti with 11 years of experience building and guiding teams that deliver resilient, cloud-native microservice platforms across large public- and enterprise-sector projects. He combines deep JVM expertise (Java, Kotlin, Scala) and multithreaded asynchronous system design with practical platform skills in Kubernetes, Docker, Helm, Ansible and a variety of SQL/NoSQL datastores. Known as a hands-on mentor, he drives quality through peer reviews, automated testing and CI/CD while cultivating continuous learning in his teams. Steffen has made notable open-source contributions to the widely used strimzi Kafka operator—adding CRD validation, typed reconciliation improvements and certificate-expiry metrics—highlighting his focus on production reliability and observability. His background spans both consultancy and in-house leadership at companies like Maersk and Nordea, giving him a strong track record of translating complex business needs into scalable, maintainable systems. Based in Copenhagen, he pairs rigorous academic training in computer science with a practical bent for platform engineering and hiring top talent.
11 years of coding experience
9 years of employment as a software developer
Computer Science, Computer Science at UiT- The Arctic University of NorwayMaster's degree Computer Science, Master's degree Computer Science at Københavns Universitet - University of CopenhagenTechnical University of Denmark
English, Danish, German
Github Skills (9)
javas10
kubernetes10
kafka10
kubernetes-operator10
java10
kubernetes-pods10
testing8
metric8
micrometer7
Programming languages (4)
Github contributions (5)
strimzi/strimzi-kafka-operator
Mar 2024 - Aug 2024
Apache Kafka® running on Kubernetes
Role in this project:
Backend Developer
Backend DeveloperContributions:65 reviews, 9 PRs, 87 comments in 5 months
Contributions summary:Steffen contributed significantly to the `strimzi/strimzi-kafka-operator` repository, focusing on enhancing the codebase. They implemented validation for `@JsonPropertyOrder` in the CRD generator, improving code quality. They also enhanced the ReconcileResult class with a type parameter, indicating a focus on improving core reconciliation logic. Furthermore, the user added metrics related to certificate expiration, contributing to better monitoring capabilities within the operator.
kafka-streamsapache-kafkadcosdata-streamsdata-stream
steffen-karlsson/strimzi-kafka-operator
Mar 2024 - Aug 2024
Apache Kafka® running on Kubernetes
Contributions:2 PRs, 144 pushes, 5 branches in 5 months
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