Android map based app

Hello, we are looking for a Android developer (or a team) mastering the standard Android API, programing with modularity and complex UI interactions. Good skills in map related features and communication layer (at least REST) are required. We will continue to develop by ourselves this app and add other functionalities so it's important that a good structure is used and a clean and commented code is given, we should be able to modify it without too much trouble. the features of the app are globally * map based * geolocation and zones recognition (some algorithms will be given) * mostly offline * Facebook / twitter / email sharing * push and internal notifications The application will have as well some extra modules such as a setting page, news reader, schedule viewer, contact page, webcamviewer and some webviews. It must be compatible with every kind of device except for extra small one. Visually the app will have one main screen with buttons linking to various modules including the core of the app : the map. Design is not yet defined so it's very important that the main screen is easily customizable so we need modular and properly commented code. A lot more details will be given once the freelancer is chosen. A NDA must be signed by the developer or his team about further details that will be given.