Here’s an example of some of the individual hardware-related roles you might find on a big team:

Design:

Mechanical Engineer

Industrial Designer

FEA Engineer

Materials Engineer

Engineering Program Manager

Reliability Test Engineer

Technology:

Electrical Engineer

Antenna/Bluetooth Engineer

Camera Engineer

Display Engineer

Battery Engineer

And more…

Operations:

Test Station Designer

Manufacturing Engineer

Operations Program Manager

Tooling Engineer

Quality Engineer

Supply Chain Manager

Procurement

Software:

Firmware Engineer

Hardware Test Engineer

Software Engineer

Web Developer

And more…