I'm going to talk about some features that we've done recently for one of ourclients "Namba Taxi": * Show nearest available drivers in our mobile app and moving single car on map * Help our partner build traffic jam map based on our data In my talk I want to reveal: * How we collect GPS tracks from driver apps and save mobile traffic * How we implemented lightweight network interaction between the driver app and backend services * What solutions were used for high performance on backend * How we store GPS tracks for client history * How animation of car works inside the client app * How to perform monitoring and ensure that service works fine * Geocoding problems in developing countries with lack of maps data