I recently interviewed for the Mechanical Design Engineer, Data Center Design Engineering role at Amazon, and overall, it was a positive experience. The interview was very technical and focused primarily on data center design and fundamental HVAC principles. The questions were thorough and ranged from detailed aspects of mechanical design to specific scenarios related to data center operations. I appreciated the depth of the technical questions as it allowed me to showcase my expertise and problem-solving skills. However, it's worth noting that the interview lacked behavioral questions, which was a bit surprising. It was strictly technical from start to finish. While I didn't receive an offer, I found the experience to be a valuable opportunity to test my skills and knowledge in a high-stakes environment. If you're preparing for a similar role at Amazon, I recommend brushing up on your data center design knowledge and HVAC fundamentals, as these will be the main focus areas.