The process, although lengthy, was quite expeditious and enjoyable. It consists of a HackerRank OA, followed by 4 interviews, a take-home, and 2 final interviews. All the interviews were one-on-one sessions with engineers from various teams within the company. They provided great insights into both the teams and the company as a whole. Almost all of the interviewers were not only highly knowledgeable but also remarkably approachable and easy to converse with. However, it's worth noting that the final interview had a slightly different atmosphere, feeling noticeably more intense and less welcoming. The OA comprised a mix of LeetCode-style questions of easy/medium difficulty along with some semi-basic probability questions. Subsequent interviews typically began with introductions and discussions about my CV and related topics. This transitioned into a series of 2 to 3 LeetCode questions of medium/hard difficulty. Most of these questions were classic problems, while some were quite unique and intriguing. Occasionally, mathematical/logical puzzles were presented instead. All the puzzles I encountered were quite well-known. The take-home involved implementing a Java/C++ program related to order books, featuring specific requirements. While the coding itself didn't demand much time, the real challenge was in parsing a large document and acquiring the requisite financial knowledge. Small tacit financial knowledge goes long a way. That being said, the allotted time was more than sufficient. The final two interviews were less structured, YMMV. The first one felt like an engaging, high-level technical conversation, covering topics ranging from low-level programming to semi-basic computer architecture and optimizations. The final interview was similarly structured to the previous ones, with some added C++ questions, and a review of the take-home. Overall, it was a very positive and insightful experience.