I work at a product design firm here in the US, we're also organized like this. Engineers that can deliver end up getting more clients, so it does end up somewhat like a law firm (their hourly rates are still higher, which IMHO is crazy..).
We also make cameras, I've become the MIPI expert.
Our bread and butter includes mechanical design, PCB design and firmware / FPGA design. This maybe sounds like basic stuff, but includes things like RF and COMSOL / ANSYS physical and mechanical modeling and simulation.
A startup company in India hired us: they had plenty of software developers, but wanted experts to de-risk the hardware and low level firmware.