The interview process was very hands on and informal. The engineering team was all present and was overall very easy-going about it. There were technical and coding questions focused on issues that can arise with multi-threaded code, memory optimization, BLE, USB serial protocol, and problem solving by elimination in complex multi-component systems. I think the interview ran 3 or 4 hours, so not over quick. We were all tired by the end, but it was friendly and cordial.