I had a five-round interview process for a Quant role at Morgan Stanley. The first round was a phone screen with a focus on my resume, finance terms, and a medium-difficulty LeetCode problem. The second round was held in India and involved a system design question about creating a dictionary index, followed by discussions on concurrency. The third round took place in London and focused on financial concepts like option and future Greeks and their impact. It also included a hypothetical scenario question. The fourth round, held in Hong Kong, was more relaxed and involved a discussion about the project and behavioral questions. The final round was another phone screen with a focus on my resume, probability, and more questions about options and futures. The entire process took approximately three months.