First contact with HR person, with a quick interview of about 30 minutes, asked about my experience in general and talked a little about the company. Then the technical interview conversation was scheduled with a machine learning engineer from the company, this conversation was about general aspects of ML, talk a little and then ask a specific question. All very polite and helpful.

Two rounds phone interview followed by one virtual onsite. The process is very smooth and HR is very responsive. The onsite contains multiple one-on-one meeting including machine learning, algorithm, system design and product design.