Amazon Senior Software Engineer interview questions

Multiple interviews that suck up a lot of time. If you get to the final step it is a 7 hour "loop" with about 6 different interviewers asking different technical problem solving questions and culture fit questions. After all that, if they decide not to move forward you get no feedback. They just drop you with a short "game over" email. Then a day or two later they want you to give them another 30 minutes to answer a questionnaire about their interview process.