Build a UI base with Open source API

The details of this projects will be discuss privately. This is regarding building mobile UI for iPhone and Android base on an open source API. There is chance to make minor changes in the open source API. If you have knowledge of NLP and/or GA is better but not essential Payment will be split in 3 solution. 20 % at the start, 30% during the project and the rest when the app is tested in all platform. I require fast communication via skype during the project. There is a chance you will have to sign an ND