The interviewer is rude and blunt and arrogant, trying to poke holes in my resume. Some questions about the 5-stages CPU pipeline and memory barriers. In the job description, it says CPU/GPU/DSP engineering but when I ask the interviewers he said it's DSP only.

There was an initial virtual meetup to go over the job role and walkthrough CV, followed by a two hour long technical interview. Many aspects of DSP and software engineering were covered including, multi threading, rate matching and data structures.