I wrote much of the original BusMapper website and all of the iOS app. The only other person involved (other than Azmat, the CityMapper founder) was Mattias, who did all of the hard core routing algorithms - is he the guy on your team?

You can still get the BusMapper app at https://itunes.apple.com/us/app/busmapper/id431558152?mt=8, but CityMapper has come a long way since then!