João Paulo has done several contributions to Linux Bluetooth stack. He is currently working on INdT with Bluetooth Low Energy support on BlueZ (both kernel and userspace). He has spoken on last Linux Plumbers about AVRCP integration on the desktop and on last Desktop Summit about OTR support on Telepathy.

Andre Guedes works for INdT (Instituto Nokia de Tecnologia). He is an active
contributor of BlueZ project, manly on Low Energy support to the Linux
Bluetooth stack.