First HR chat, then talking about an ML project I worked on in the past , discussing trade-offs and answering in-depth questions, then ML system design interview driven by the candidate

I had a first-round interview with the recruiting team and a second-round interview with the hiring manager. The hiring manager focused on my specific skills and past experience in data science and machine learning. They are looking for someone with specialized skills to conduct ML experiments. The stakeholders are primarily other data scientists, and the goal is to provide a smooth and efficient experience for them to conduct various experiments. What impressed me the MOST is that, Skyscanner takes interviewers like us really seriously. They rejected me eventually but they also scheduled a 30 mins to talk with me on specific reasons why they have rejected me and what points they appreciated me as a candidate. I truly appreciate this since most companies won't do this but just sending an automated template for rejection.