Converting WDM driver to WDF

I have driver for bluetooth has been written in wdm. I would like to convert the code to the latest Kernel-Mode Driver Framework (WDF). in addition to the converting, the wdm contains few bugs, these bugs must be solved in the wdf version. the current version bugs are: 1. plug and unplug many times the bluetooth dongle, the driver will not recognize the usb dongle. 2. with CSR shipset the driver sometime can't recognize them. 3. the sending of obex is not stable in this driver, some times freezed. an NDA agreement must be signed before starting work, and a demo version before choose the winner. source code must be provided once the project finished. Regards,