Christian does a great job at contributing new code to MozStumbler :) And he fixed lots of bugs, too.
A significant and regular contributor of both patches and ideas to the Mozilla Stumbler project, thanks Christian! http://github.com/mozilla/mozstumbler
Significant contributions to the Mozilla Stumbler codebase including the map view networking layer, android notification fixes, metrics changes, GPS scanning and various privacy enhancements.
Christian fixes bugs, including several that I reviewed or mentored.