Revolut Software Engineer Python interview questions

I took the interviews remotely since I'm from outside the EU. The interview process started with a video call with a recruiter, we went over the positions I applied for on a very high level and he screened me with 5 or 6 very basic Python and SQL questions. That same day he sent me a home task, there was a Python part and a SQL part. Between both of them, it took me around 4 or 5 hours. I ended up learning some PostgreSQL specific features to do the SQL challenge. A few days later they sent me feedback related to the task, no BS, completely honest and to the point. After that, we did 2 interviews back to back. One was more of a technical screening. They touched subjects related to Python, SQL, clouds, etc. then they asked me to design an API and we talked trough different technical aspects to consider when implementing it (transactions, isolation levels, idempotent operations, etc.). The third and final call was with the PO that I'd end up working with. We had an interesting conversation, he told me about the company culture and asked how I'd solve a couple of different problems. He was very friendly and I think we hit it off well. A few days later I got a call from the recruiter to tell me I got an offer. Everyone was friendly and I might be old school but I liked the personal touch of getting a call to tell me I got the offer and a video call at the beginning of the process to talk about it a bit. I imagine with all the applications they get doing the initial call with everyone is a lot of man/hours, so I really appreciate they do it.