Team Management, Software Architecture, Microservices. Clouds, Container, Kubernetes, SOA, EDA, CEP, ETL, Go, Erlang/OTP, Python, Smalltalk, Java, NoSQL / ODBMS / RDBMS, Software Engineering, Agility, Requirements Engineering, Software Cost Estimation, System Analysis and Design, System Administration, High Availability, Unix and OS X, free Author (dpunkt, iX, Entwickler Magazin, Java Magazin, Linux Enterprise)