I applied online, and a recruiter reached out to me. We had a regular recruiter screening interview. Moved to online phone screen. They will start with intros on both ends and ask about a project in detail. I explained my project in detail, but the interviewer didn't feel it was very challenging. Well, can't do much about it. Then went for a system design question. I explained till deep dive, and then the time was over. The last 5 minutes were spent asking any questions I had. I feel 20 min is way too little to design and discuss system design. But that's how their process is. I felt the interviewer was condescending.

Tricky with lots of technical questions would recommend knowing your stuff. Microprocessors were repeatedly talked about as well so worthwhile knowing what they are and now I’m trying to reach thirty words