Amazon Software Development Engineer interview questions

My interview process had three main steps: 1. Interview primer w/ recruiter 2. Technical phone interview 3. Technical on-site interview The phone interview consisted of a leetcode medium question and I was given a leetcode hard as a follow-up. I was told the follow-up was purely additional as I had completed the interview with a bit of remaining time. The on-site interview consisted of 3 leetcode question, 1 technical/leetcode question, and 1 system design question. The 3 leetcode questions were all in the medium-hard range. The 1 technical/leetcode question was more of an exercise to pick my brain, I essentially had to work through Huffman coding (I was not familiar with this at the time but it's fairly straightforward), this was probably the hardest round and it was with the bar raiser. The last interview was a system design portion which I was ill-prepared for.