What I bring – and where it has proven itself.
For CTOs, architects and everyone who wants the detail: what I master in practice and where it has proven itself in production.
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Safety-Critical Systems Architecture
Solution architecture under the CENELEC framework (EN 50126/50128/50129): RAMS requirements, standards-compliant evidence, separation of safety-relevant and non-safety-relevant system parts in rail operations.
ÖBB Infrastructure (ongoing): target architecture for modernising the train dispatcher workstation; digitalisation and automation of train routing; alignment between operations, business units, IT and external suppliers.
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Legacy Coexistence & Mainframe Integration
Integration patterns between cloud-native services and business-critical IBM AS/400 systems; step-by-step replacement of legacy components without interrupting operations.
LKW Walter: steering the coexistence of AS/400 and a microservice landscape (700+ services). ÖBB ticket shop: replacing legacy systems in the sales channel, including terminal-server provisioning for counter clients.
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Software Intelligence & AI Agent Architecture
Semantic knowledge graph of software landscapes (applications, services, infrastructure, teams); retrieval-augmented pipelines (pgvector, Claude API); multi-agent design for automated architecture and impact analysis.
Archilence: platform architecture, agent design and engineering infrastructure; in production it cuts change-impact analyses from 3–4 weeks to 30 minutes. Haley: multi-agent assistant in production with long-term memory and asynchronous task processing (BullMQ).
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Enterprise Architecture & Architecture Governance
Architecture documentation and modelling with arc42 and ArchiMate; architecture decision records; establishing architecture standards across an organisation.
ÖBB Infrastructure: introduced arc42 and ArchiMate as the standard. LKW Walter: company-wide governance for event-driven architecture. iSAQB CPSA-F (2025).
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Event-Driven Architecture at Scale
Kafka as the central event backbone for cross-service communication and data flows; decoupling, consistency and ordering strategies in large distributed landscapes.
LKW Walter: introduction and governance of EDA across 700+ services in one of the largest transport organisations in Europe.
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Federated Identity & Regulated Inter-Organisational Integration
SSO federation across organisational boundaries, integration of central identity providers; test and integration concepts across several delivery partners in regulated environments.
Accenture / federal government: test concept and test environments for the ELGA rollout (Austrian electronic health record), including SSO federation between ministries (BMF, BMG). ÖBB, LKW Walter: IdP integration for customer and dispatcher portals.
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High-Volume Transaction & Payment Systems
Architecture of transaction-critical sales channels; integration of payment service providers; connection to existing Java back-end services.
ÖBB ticket shop: re-implementation at around 3 million ticket sales per month, two PSP integrations.
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0-to-1 Product Architecture & Technical Leadership
Building a SaaS platform from scratch; microservice boundaries, API design, integration of external platform APIs; leading developer teams.
tubics (CTO, 6 years): microservice architecture with up to 14 services, deep integration with YouTube and Google APIs, leading up to 6 developers.
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Cloud-Native & Hybrid Infrastructure
Containerisation and orchestration (Docker, Kubernetes, Helm), CI/CD; operations across public cloud and on-premises environments.
GCP (LKW Walter, tubics), AWS, Hetzner Cloud (Archilence, production), Scaleway, DigitalOcean; on-premises deployments in federal government IT.
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Full-Stack Engineering
TypeScript/Node.js, Java/Java EE, Python; Angular, React/Next.js, SvelteKit; PostgreSQL, Redis, MySQL, MSSQL.
Hands-on at every station, from Accenture (Java EE) to Archilence (TypeScript, PostgreSQL/pgvector).