Amazon Senior Developer interview questions

After the phone screen, was sent a link for a programming problem, it was not a call, but an online website. It had two problems that could be implemented naively with two nested loops, but were expected to implement with lower time complexity, otherwise some test cases would timeout. Then showed some fake emails and multiple choice options for ranking your recommendations for the problem in the email. Then some psychology and personality questions. All together it was about 3 hours. No feedback, just generic reject email.