Captain Sam
Cross Platform application & Go API
I recently joined this startup, their concept is simple : Captain Sam brings you back home with YOUR car when you're in no condition to drive.
I firstly designed an API in golang (with Google App Engine) for the IOS & Android apps to connect to. Then I joined another developer to handle the IOS part of our cross-platform framework : Xamarin
The service used a simple phone number untill now, but the apps will be released next month and it will greatly improve user experience !