Christopher Haar
Software Engineer at Upbound
Darmstadt, Hesse, Germany
Summary
🤩
Rockstar🎓
Top SchoolChristopher Haar is a software engineer and cloud-native specialist with nine years of experience building and operating infrastructure for enterprise and open-source projects from Darmstadt, Germany. He has held progressive roles from system engineer to lead cloud engineer and staff/principal solutions architect at Upbound and major German enterprises, focusing on DevOps, OpenShift, and AWS integrations. Christopher is an active contributor to Crossplane and its AWS provider, where he implemented CRD migrations, dependency fixes, and practical features like Kafka cluster configuration and ACM certificate sync—work that improves stability for cloud control planes. He combines hands-on backend and DevOps expertise with a track record of translating platform architecture into reliable operator tooling and automation. Notably, his background in both platform architecture and direct code contributions gives him a rare blend of production operations insight and upstream open-source craftsmanship.
9 years of coding experience
9 years of employment as a software developer
Fachinformatiker @ Deutsche Telekom AG, Anwendungsentwicklung, Fachinformatiker @ Deutsche Telekom AG, Anwendungsentwicklung at Werner-von-Siemens-Schule Frankfurt
Github Skills (24)
kubernetes10
controller10
kafka10
terraform10
cicd10
terraformer10
controls10
go10
aws10
kubernetes-pods10
control-systems10
infrastructure-as-code10
cloud-native10
cloud-manager9
cloud-computing9
Programming languages (20)
Github contributions (5)
crossplane-contrib/provider-aws
Jun 2021 - Jan 2023
Crossplane AWS Provider
Role in this project:
Back-end & DevOps Engineer
Back-end & DevOps EngineerContributions:22 releases, 403 reviews, 274 commits in 1 year 7 months
Contributions summary:Christopher primarily contributed to the AWS provider for Crossplane, specifically focusing on the Amazon Web Services (AWS) cloud environment. Their work involved fixing bugs related to state machine and activity deletion in the service, as well as resolving issues related to the syncing of private certificates for ACM (Amazon Certificate Manager). Additionally, the user implemented several features including setting up custom configurations for a Kafka cluster, setting the IAM role and applied a new security configuration to the kafka cluster. The user also implemented the addition of the tag, and ensured that external secret stores where configured as per requirements.
providerterraformawsterraform-modulecrossplane
crossplane/crossplane
Dec 2021 - Dec 2021
The Cloud Native Control Plane
Role in this project:Backend Developer & Cloud Engineer
Backend Developer & Cloud EngineerContributions:33 reviews, 3 commits, 25 PRs in 1 day
Contributions summary:Christopher Haar's contributions primarily focused on enhancing the Crossplane project's core functionality and infrastructure. They implemented crucial CRD migrations and dependency fixes, improving stability and resolving integration issues. Furthermore, they updated dependencies and introduced features like a version subcommand, reflecting involvement in managing dependencies and project tooling. Their work also includes cloud-native infrastructure improvements, such as bumping the crossplane-runtime and adding options for validating schemas from crossplane.
containerscloud-computingserverlesscloudmulticloud
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