Bluetooth Sensor Device for Android

Hi We are mobile development company and we develop apps for iOS and Android. We are looking for electronic engineer for our project. It is already existing hand made device which consist of bluetooth and sensor. This device connects to Android phones and send the users information which sensor gets. Mobile development will be handle by ourself. What we need is; - This device PCB is being sold but we want to do our own PCB so we remove bunch of useless parts - Add few more feature - Reduce size of the device (keychain) - Android or Java programming knowlage Basicly device will use small battery and user can easy carry with him on keychain. Long battery life (should only turn on when user wants to use it with phone) The idea is pretty easy. Please send contact me for more information. I will escrow full amount of the project and release half when i receive shematic and we build demo here, if it works fine, i will release rest of the payment. We have more hardware projects in future so would like to work professionals.