create an app

I am looking for a Ninja developer to help me build the project. The product is an iphone/android mobile app for public transportation. Please feel free to send me a short message for more details .. I will answer only to those who send me a message with links to apps they have developed .. Please do not send spam messages. * It is important to note that the payment - will be made at the end of the work ..There are also bonuses. Thanks.