40+ years of active hacking on almost everything, open source as well as in business. Expertise in computer languages & compilers, operating systems, esp. Unix-derivatives, from low-level platform support including device drivers, and network protocol design and implementations, computer and information security, databases esp. SQL, Android and integration. Team leader for 30+ years responsible for both resource management and education of teams.
Major open source projects I've taken part in: GCC (esp. G++), OpenBSD (and formerly NetBSD).
Most common languages: Java, C++, C, Scala, Perl, PHP, Rust, sh. Most common database environments: PostgreSQL, Informix, MySQL Most common operating systems: OpenBSD, Linux, MacOS X, Android & MS Windows.
Keen golfer, chess player and beer drinker (co-owning a swedish brewery: Dugges bryggeri AB)