Coding challenge on LeetCode. This included two tasks: one on the easy side and one medium/hard task. I was not able to pass all the unit tests for the harder task due to corner cases and timeouts. However, I surprisingly received an email that I succeeded in this round. So even if your solution is not 100% correct, you might pass.

Quiz about basic system design concepts, similar to what would be on a basic AWS certification exam (mostly about databases and cloud stuff, as I recall).

Phone call with a recruiter. This included quick-fire questions about basic CS topics, such as the time complexity of a hashmap lookup, what a linked list is, depth-first and breadth-first search, and some cache eviction strategies.

Technical interview session. This was the core and most difficult part, composed of four separate sessions. Three involved coding, and one was system design. All four included two behavioral questions. For coding, I encountered various problems, but knowing graph algorithms will likely prove beneficial.