I applied through my university and got called in for an interview. It was two parts, with the first being the standard behavioral questions. It was more relaxed and easy going than the second part, which is the problem solving aspect of the interview. Make sure you understand process flow and to look over the questions that are posted on this site, as they are used verbatim. The guy was pretty intimidating so be prepared for that as well.

Paneles con el método start con diferentes personas de diferentes puestos basada en la cultura de Amazon. Buen proceso de selección, bastante justo y estructurado. En inglés. Recomiendo practicar situaciones con método start.