Amazon Software Developer interview questions

Was cold-called by internal recruiter who was following-up for a tech manager who had seen my online resume. Recruiter strangely was more comfortable with phone than email, so our exchanges took a long time to transpire. My background is User Interface Development, which is all over my resume, so I assumed the position was related given the tech manager's interest, though I didn't expressly hear this from the recruiter. Eventually we setup a phone interview between a developer and myself, and I was caught off-guard by a series of backend software engineering technical questions. The interviewer was very nice, and we worked through many of the questions together, but I constantly made mention that these were not the sorts of things I deal with in the work I do. The interviewer was decent throughout the process, especially given my bickering about the lack of relevance to my background. I emailed the recruiter after the interview describing the awkward interview situation. I was surprised to hear back that I passed and was being asked to conduct another technical phone interview. I wrote back stating I would be happy to but only if it was more related to my industry background, which I described in more detail to the recruiter. Oddly, after that I received a curt reply back stating that they no longer wanted to proceed with the interview process. The recruiter just ended it there and did not even try to find me a position or group with a better fit within the company. In short, the recruiter was not very professional but I felt the developer who interviewed me was.

I applied online using the official website. After a week or so, I was contacted by a recruiter that wanted to schedule my first phone interview a specific position in Seattle. I did a second phone interview as well. Both the interviews were technical and about algorithms, complexity, object oriented design and general knowledge. Now I am waiting for the on-site interview in Seattle. The overall process so far worked fine. I am just slightly disappointed about their HR system, which I personally felt pretty chaotic