I worked at Sallie Mae full-time (More than 8 years)
There was a lot of flexibility which included home office and most of the time making own work/travel
The company is very political. People are very insecure about their jobs and if you talk to someone higher above you without your direct manager they make it a big problem.
I applied through a recruiter. The process took 1+ week. I interviewed at Sallie Mae (Baltimore, MD) in April 2015.
It was a long line before I can even get my name called. After they called my name, I still waited another thirty five minutes before I can meet the person interviewing me. My interviewer looked extremely tired and kept yawing the whole interview.