2 rounds : Round 1 was talk about the ml models on my resume(went deep into their theory) and couple of case studies centered around amex's business model. Round 2 was case studies again and questions like why amex? both rounds were a mix of technical and hr.Would suggest strongly brushing up one's knowledge of credit cards and amex's revenue streams

2 rounds of interview, coding assessment, followed by a round of behavioral interview and a technical live-coding session. Not too many challenging questions in the technical round, just testing basic understanding of data science and statistics.