I applied online. The process took 5 weeks. I interviewed at Fender Musical Instruments in Nov 2020
Interview
There are quite a few rounds of interviews. Usually an initial conversation with HR, followed by the hiring manager. After this (in my experience) you have to complete a written assessment, the questions are fairly straightforward if you know your stuff. You'd then be scheduled a couple of more interviews with the team to get to know them and have Q&A, it's not too technically heavy past the written test but be prepared to answer questions relating to the job.
Interview questions [1]
Question 1
Q: What would you look out for while troubleshooting a tube amp's power supply?
Q: Calculate the complex impedance of the following circuit (f=60Hz)