First time I did it in 2019 (London).

There were many rounds:

• Online coding challenge.
• Rounds 2, 3, and 4 - 1-hour technical and design video calls (all interviewers from USA, different locations).

Two of them kept their video off, so I was looking at a dark screen, which I found quite unprofessional.

I stopped the process as I got an offer from another company, because the recruitment process was taking too much time. It took two weeks to get the code review of the first assignment, so I was happy to accept the other offer.

Payment system design, reactive programming, CI/CD, and data structures related questions.