Multiple rounds, had an OA which was quite intense. The engineer was nice at the tech interview level. We went through the questions together. Generally, it was okay, and collaborative.
I applied online. The process took 2 months. I interviewed at Two Sigma in Jan 2025
Interview
Friendly interviewers. Really long process. Took 5 weeks to get OA and two more weeks to get interview. Interviewer reschedule though the day before and had to do some schedule shuffling.
After finishing the online assessment, I got into phone screen. Unfortunately I failed it so I didn't get into the onsite stage. I heard the onsite would be three rounds.