Took an exam online that tested logic, math, and ability to learn a programming language. Spoke with a TS engineer over the phone.
Final round was a very relaxed on-site interview. Included one case interview about how I would prioritize different clients' problems, and one one-on-one with an HR representative. Everything else throughout the day was in small groups--a Q&A session, a tour of the campus, and a demo of the software.