> If you ever decide to try - ping me, I happen to know a few guys there :-)
Ha, I have actually been entertaining that idea for quite some time, but it seems rather difficult to penetrate that domain as an outsider. The links you shared only seem to confirm that. :-\ I'm not sure I would even want to compete with the Google/Apple Pay duopoly, for now I'd mostly just be interested in an open-source, privacy-preserving solution for contactless payments.
Anyway, you might want to add your contact info to your HN profile – just in case. ;-)