After several back and forth emails with the recruiter. I was invited for a 15 minutes zoom meeting. I thought, ok, it will be mainly about my background as it's just 15 minutes. I was in for a rude awakening. The interviewer asked about my background and went right into asking high level technical questions. I answered the questions but I was taken aback as it wasn't expected. Be prepare for technical questions even though it 15 minutes. This is the first round I was told.