About Sascha Willomitzer

Platform architect, speaker, trainer. Behind Fokusnuss stands The Chameleon Way IT GmbH — parent of the K8Box family and CTO consulting for the mid-market.

Sascha has been building platforms for more than twenty years — from an eight-person startup to the cloud transition of one of Germany’s largest administrative organisations. Today: architect of the K8Box platform, consultant to mid-market CTOs, trainer for the engineering teams who want to work with this architecture.

Agentic AI in production: Sascha built and led the team behind an agentic voice and chat platform that replaced a legacy call-centre solution within two months and now handles five-figure daily interaction volumes — RAG pipelines, tool calling, guardrails, evaluations, in production. This is not new territory: back in 2014 Sascha brought probabilistic search models (fuzzy search) for loan-risk management into production. The AI trainings draw from this years-long practice — not tutorial knowledge, but operational truth.

What sets the trainings apart: every example comes from a real system running in production in the same quarter. No generic demo repos, no “cloud-native reference architecture” marketing material. If something gets explained in a training, it has failed once or twice in practice before it worked.

Stage experience

Talks incl. the Lanxess Arena Cologne — a good reminder that technical topics work in a hall seating ten thousand people too, when told honestly, concretely and without marketing speak. And that is exactly how the workshop runs the next day: same register, same honesty — just with a whiteboard instead of a giant screen.

Focus areas

  • Agentic AI — RAG, tool calling, guardrails, evaluations, LLM orchestration in production.
  • Kubernetes — from cluster bootstrap to multi-tenant operations.
  • Platform engineering — CI/CD, GitOps, internal developer platforms.
  • Identity — OIDC, Keycloak/Zitadel, token exchange, multi-tenant realms.
  • Sovereignty — EU hosting stacks, migration from hyperscaler architectures.
  • Architecture reviews and ADR culture as an engineering asset.

Where else we publish

  • LinkedIn: short posts tied to concrete architecture decisions.
  • XING: German-language mirror with DACH context (public sector, EU stack).
  • Medium: in-depth articles on token exchange, native image, multi-tenant realms.

Accreditations and certifications

Accredited by the International Scrum Institute: Scrum Master, Scrum Coach and Scrum Trainer — all three levels, not just the SM basics. Trainings on every level draw from actual responsibility carried in teams, not from the textbook.

  • SMAC Scrum Master Accredited — 2017 · ID 61259211684111
  • SCAC Scrum Coach Accredited — 2018 · ID 23352165697608
  • STAC Scrum Trainer Accredited — 2018 · ID 01443152205552

iSAQB — Module AGILA (Agile Software Architecture) — Software Architecture Camp Advanced at embarc, InnoQ and Entwickler Akademie, 2018. Architecture workshops build on this foundation, not on slide templates.

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Professional liability via Exali AG

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