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Sönke Liebau

PROFILE

Sönke Liebau

Over a three-month period, contributed to multiple StackableTech repositories by delivering targeted improvements in Kubernetes operator reliability, security tooling, and deployment documentation. Addressed a critical RBAC deletion bug in operator-rs, refactoring resource naming and encapsulating internal utilities using Rust to enhance safety during reconciliation. Enabled software composition analysis for Omid in stackabletech/docker-images by integrating CycloneDX, supporting SecObserve compliance workflows, and improved Windows developer experience through clear documentation in stackabletech/stackable-cockpit. Additionally, updated listener-operator deployment guides to clarify kubelet work directory configuration for k0s, reducing misconfigurations. Demonstrated skills in Rust, Kubernetes, build automation, and technical documentation across diverse projects.

Overall Statistics

Feature vs Bugs

75%Features

Repository Contributions

4Total
Bugs
1
Commits
4
Features
3
Lines of code
132
Activity Months3

Work History

December 2025

1 Commits • 1 Features

Dec 1, 2025

December 2025 (2025-12) — Key feature delivered: Documentation update for listener-operator deployment detailing kubelet work directory configuration for k0s. This guidance helps ensure correct deployment and reduces misconfigurations. Major bugs fixed: None reported this month. Overall impact: improved deployment reliability, smoother onboarding for operators, and clearer prerequisites for Kubernetes-based deployments. Technologies/skills demonstrated: Kubernetes, kubelet configuration, k0s, operator deployment patterns, technical writing, and documentation maintenance. Deliverables tied to commit: fddaebd5f75385c3110dc10567025cff73d0f8bb.

March 2025

2 Commits • 2 Features

Mar 1, 2025

March 2025 monthly summary focused on security tooling enablement and Windows usage guidance across two repositories. Key work delivered included documentation clarifying Windows binary availability for Stackablectl and wiring in software composition analysis (SCA) capabilities for Omid via CycloneDX, enabling SecObserve integration. No major bug fixes were closed this month; blockers were mitigated through clear guidance and build tooling improvements. Business impact includes improved security posture, compliance readiness, and reduced Windows usage friction for development and deployment workflows.

November 2024

1 Commits

Nov 1, 2024

November 2024 monthly summary for stackabletech/operator-rs: Delivered a critical RBAC reliability improvement in the operator by fixing a deletion bug and refactoring naming. The changes reduce risk of accidental deletion of coreRBAC resources during reconciliation, and establish a safer, more maintainable foundation for RBAC resource creation going forward.

Activity

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Quality Metrics

Correctness92.6%
Maintainability90.0%
Architecture90.0%
Performance85.0%
AI Usage20.0%

Skills & Technologies

Programming Languages

JavaMarkdownPythonRustXMLadocasciidoc

Technical Skills

Build AutomationDependency ManagementDevOpsDocumentationKubernetesOperator DevelopmentRBACRust ProgrammingSoftware Composition Analysisdocumentation

Repositories Contributed To

4 repos

Overview of all repositories you've contributed to across your timeline

stackabletech/operator-rs

Nov 2024 Nov 2024
1 Month active

Languages Used

MarkdownRust

Technical Skills

KubernetesOperator DevelopmentRBACRust Programming

stackabletech/stackable-cockpit

Mar 2025 Mar 2025
1 Month active

Languages Used

adoc

Technical Skills

Documentation

stackabletech/docker-images

Mar 2025 Mar 2025
1 Month active

Languages Used

JavaPythonXML

Technical Skills

Build AutomationDependency ManagementSoftware Composition Analysis

stackabletech/listener-operator

Dec 2025 Dec 2025
1 Month active

Languages Used

asciidoc

Technical Skills

DevOpsKubernetesdocumentation