I applied online. The process took 2 weeks. I interviewed at DSR (Porto, Oporto) in May 2023
Interview
They rejected me after a 2h technical interview. First time ever that I was rejected after a technical interview, so I was very surprised. They didn't seem to bother much about my achievements in previous jobs or how I solved previous technical challenges, which I found really odd. They were more eager to just ask about some random C/C++ questions. They didn't seem to have a lot of experience in knowing what to look for in a candidate that can actually solve problems and get things done.
Interview questions [3]
Question 1
They ask for you to do a code review of some code snippets. In particular, they had a snippet with the malloc() family of functions which is really weird since using dynamic allocation on RTOS and embedded systems is frown upon. So this question was not relevant at all for the job since you'll never be using dynamic allocation in most embedded systems unless you want things to catch fire and explode. It's almost as if they didn't know what to ask for, but found that question online and though it would be suitable to use it on the interview.
They also ask if you recognize some C declarations as valid and ask you to comment on what they do, like a function pointer and a const volatile pointer variable.
At the end, they ask you to share your screen and write a simple code snippet that performs a byte swap when given a uint32_t variable. So, you need to write a function that converts 0x12345678 to 0x78563412.