Today that's secure communication architecture at Schwarz Digits: cryptographic system design, distributed systems, and MLS-based work for high-trust settings. Before that, the Digital Foundation, a group-wide engineering platform that runs today with the teams I led. Earlier still, Kaufland's first customer-facing app and its first cloud-native system, and the iOS vulnerability research that surfaced four CVEs.

Small high-performance teams, substance over process. A clear sense of what's actually needed, not just what's on the plan. An enduring interest in what makes systems hold up under pressure.