Applied online and received an email about two weeks later with an invitation for a pre-screening programming aptitude test through HackerRank. The problem was to parse a binary file containing trade information exchanges and extract various information from it. It was pretty easy but somewhat time consuming. I did get 72 hours to complete the task and it probably took me about 5 hours total with testing and everything. Make sure your code compiles and runs on Linux! I received an invitation for a phone screen a week later. The phone screen lasted about 45 min and was mostly a conceptual discussion about C++ with special focus on C++11. HR set up a codepair on HackerRank but the interviewer did not want to use it so there was no coding involved.The conversation was actually a bit awkward but it was otherwise fair. I received a timely email two days later stating that they wont continue my candidacy. Overall fair process and reasonable timely rejection notice.

They ask difficult questions but, given the role they seemed fair. They are painfully slow about the process and I wasn't able to attend the final round interview due to a job deadline I had informed them about, which I had to commit to since they did not reach back soon enough. Later they informed me they'd like to continue but it was too late lol.