[Q] Which knowledge are required to build an ARA module? topic

Hi, I'm following Project Ara with interest and I was wondering...
Which knowledge do you think a team needs, to be able to build a module for Project Ara?
Which type of figures?

For what I have understood, it is need:
- A person able to create circuits with FPGA/ASIC: an Electronic Engineer?
- A person able to create Android Kernel Module: an Android/Linux kernel hacker. Computer Science engineer?
- Someone who is able to build Android image ARA-Compatible
- An APP developer: for building the app to manage the new module
- A 3D designer for building the envelope

What do you think?
Am I missing something?

thanks you