If you're willing to code firmware, there are also a number of jobs related to prototype building and "design". People need someone to build their CES demos. This is far more likely to get your hands dirty making actual functional systems, without all of the supply chain ODM and contract manufacturing complexity. You'll learn the importance of using good connectors and blinky debug lights. Stanford has a Design Division within the Mechanical Engineering department. Another place to look is medical, if you like rigorous testing and prototyping.

However, prepare for the fact that you will never make as much money.