I applied online. The process took 1 day. I interviewed at Pantheon (Virginia) (Reston, VA) in Sept 2015
Interview
It was very friendly interview. There were few technical questions and more organizational ones. It looked like guys tried to understand who am I, how can I work with them.
Interview questions [1]
Question 1
You have the task: improve some code. What will you do? Develop it from zero or improve existing?
I applied in-person. The process took 4 weeks. I interviewed at Pantheon (Virginia) (Chennai) in Feb 2013
Interview
Telephone rounds with recruiter(s)
Then a HR round for negotiation
Telephone rounds for technical review
Followed by face to face for final offer
The process was long but eventually they made me an offer. Many rounds meant that I got to talk to quite a few people in the organization which gave me a feel for the type of work and responsibilities that I would be handling.