It was lengthy and was being prolonged unnecessarily. The questions were really challenging and interesting. I was able to solve 70% of them. The interviewer was kind and helpful. But their HR process was uninteresting

The recruiter reached out to me for a preliminary conversation with recruiter to know my interests and more details on how my background aligned with the role. This was followed by a 30 minutes conversation with manager followed by a 4 hour interview with 4 members of the team