I applied in-person. The process took 1 week. I interviewed at Sovos (Minneapolis, MN) in May 2016
Interview
The interview process was great. They were scheduled right in a row and everyone was on time. There were great questions asked and it was a very open dialogue. The questions were extremely difficult and led to discussions which was really nice. It felt more like a conversation than an actual interview but the follow up questions were difficult.
I applied online. The process took 4 weeks. I interviewed at Sovos (Boston, MA) in Oct 2017
Interview
The interview took 4+ weeks. I applied online, then got a system notification of online test. Two weeks after, I got an email from hr for the phone interview. Just like everybody said here, 50 questions for 15 mins again. I completed that. Then hr gave me the brief introduction of the company and job position and asked my experience. Then hr told me that she could contact me if they make any decision. Unfortunately NO. I would say that a thank you email is very easy to write up. The process is lengthy.