Build an Android App that broadcasts to 2 or more BT Speaker devices

We require an experienced android stack developer to create a simple broadcast system to multiple BTspeakers and / or interconnected android devices running app It will include pairing >2 BT devices to host app and broadcast audio from host device on tap of a button to speak and playback on receiving devices one way The host device will include support for bluetooth speakerphone and or BT headset as one of the connected to host devices as mic inputandor output Ony those with experience to build app with point to multipoint functionality will be considered and will be asked to support experience or know how A nda may be required to be signed before project allocation