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== Christian Gehlen ==
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My digital kitchen sink

Work

Technical Product Manager in R&D

I work at the intersection of business, development, and infrastructure — a generalist with a passion for clean processes and solid documentation.

What I do: I analyze customer requirements and translate them into actionable tasks for developers. I write documentation, define scopes, and support both software and infrastructure architecture. In short: I turn ideas into working systems — structured, traceable, and secure.

My areas of focus:

  • Telecommunications: In-depth knowledge of German provider change processes and number management (LNP/MNP)
  • Technology stack: Java, Docker, Oracle / PostgreSQL, REST, SOAP, Messaging
  • Automation & Infrastructure: GitOps, DevOps, Ansible
  • Documentation & Architecture: Docs as Code (AsciiDoc, Markdown), visualizations with Mermaid, PlantUML, Swagger/OpenAPI
  • Security: Thread Modelling, SSDLC, Handling of cryptographic keys, certificates, and secure communication