I applied via their website. The process was divided into the following phases: 1. Phone screen with HR 2. 4 hour take-home, a standard problem you get for HFT roles 3. Technical screen with an employee with a LC-style coding problem. 4. On-site 1: As others have posted, there are three rounds. First non-technical, second technical with an API, and third technical with a LC style question. 5. Got dinged before the second on-site round 😮 Overall, I had a very pleasant experience interviewing. The employees were very nice. Of particular note, I was impressed with the elocutory abilities of those during the on-site, a rarity in software regrettably!