It was a phone interview for Back-end Hardware Engineer. I didn't have any into about the interviewer and thought he was an internal recruiter. It turned out he was the engineering manager and the interview was technical. It covered circuit design, setup and hold time, sizing, speed and power of transistors, buffer delay, wire delays, finite state machine, latch and flip-flop, blocking and non-blocking Verilog statements, low threshold and high threshold voltage libraries.