Former Linux kernel hacker, netfilter/iptables maintainer, network protocol geek, Openmoko Lead System Architect, gpl-violations.org founder, among other things.

These days I mostly work on creating and improving the Osmocom.org FOSS implementations of cellular protocol stacks, including OsmoBTS, OpenBSC, OsmoNITB, OsmoSGSN, OpenGGSN, etc.