Received an email from recruiter with screening questions and later an interview was scheduled. It was a panel interview with senior engineers, managers, and directors (almost 7 people) for 1.5 hours in total. When I asked the recruiters about any expectations from the interview, there was no response even after a few follow-ups. The interview was straightforward, work experience, projects, and if any proper hardware experience. Last half hour, I talked with directors and later the recruiters just ghosted me.