You apply either on LinkedIn or on the website of amazon. If your CV passes through the initial stage you will get an email for going in the technical interview process. The final interview stage might contain oral interview where you might be asked various situation bases questions which you need to answer using the leadership principles of Amazon.
Interview questions [1]
Question 1
Object Oriented Programming related questions, etc.
I haven't passed the hiring process but i spend talk to them think they are a good team. They also required me to be on site. Mostly, they are interested in your experiences.
CV screeening and then online assessment part 1: two coding questions (leetcode type questions oriented to amazon use cases), online assesment part 2: workstyle questions and real situation scenarios. about 3 hours to complete each part.