Gentex Corporation Embedded Software Engineer interview questions

It was a few round panels back to back. They had me do some programming questions and asked me some fundamentals. They did a mix of online and in person.

Was a 2+ month long process as follows: A ~1 hour online coding assessment, 30 minute HR call, 30 minute virtual call with the hiring manager, a 1 hour technical round, and finally a 4 hour in person technical round. Each Technical round consisted of 30 minutes of questions about my resume and 30 minutes solving a coding problem. Everyone was nice and down to earth and it seemed like a good department. I rated the difficulty as hard because while the coding questions themselves were easy/average, they were more in-depth then what I have seen/been asked at other companies and required a good amount of time/coding to get to the solution. Ended up declining offer because compensation was quite low.