The process was straightforward: coding interview 1, coding interview 2, and then system design (which should be called API design, as it's not a system design interview; I'm saying this based on my experience with various other companies).

The recruiters were good and responsive.

The coding interviews were terrific. The engineers were very collaborative, professional, and responsive to all questions, offering rapid and straightforward answers.

The API design (again, not a system design) interviewer was irritated from the beginning and totally unprofessional. They increased the stress rather than eliminating it by making unnecessary comments and did not answer requirements inquiries or provided half answers.

For instance, some of what I asked:

• How many users will be using the system? (This is an obvious question in system design.)
  • Response: "It can be any."
• Are there any limitations on the input length?
  • Response: "It can be anything."
• Is the system going to be read- or write-heavy?
  • Response: "What do you think?"
• Will the API allow writing in bulk?
  • Response: "Hmmm, let's say it could be."

My advice: Don't waste your time with them, as they do not know how to assess talent.

The questions for the principal position were easy, mostly from LeetCode easy/medium questions.

You can find the questions in other reviews.