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Bump is known for their ingenious methods of relating lots of data to figure out which two phones were being bumped at the same time (there's a really cool answer on Quora about how they do it). I would assume this is their tech team figuring out how to apply the same techniques across two devices (browser/pc -> phone). I bet there is some really cool stuff at play here.

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Is this it?

http://www.quora.com/How-does-Bump-work

I think that may be the one I read.

This is exactly why it feels so sexy. I took some courses in sensor fusion at university, and this is a very cool distributed application. Being able to create reliable "Bump-distance" vectors given all the variance with a distributed clock (though they seem to push the clock to the client in the browser), and with the position given by the browser etc. Very cool.

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