Android Custom ROM Build with custom driver

Hi, I am expert with Custom ROMs . I can do this very easily. Do you need for Android 4.4 or 5.1. I can even make android 6.0. Thanks and Regards, Shiv

Hello, i am experienced C/C++ developer under linux (kernel). I am able to integrate custom driver into kernel tree and rebuild custom Android ROM with it. For placing adequate bid i need more info about SDK used and driver needed to integrate. Unfortunately i am not have Hummingbird board, but have A31 tablet (Onda V972). Also i am not sure in existence of adequate "kitchen" (for rebuilding ROMs) for A31 chip, so if you have one, please inform me. Thanks.