I applied online. The process took 1 week. I interviewed at Persado (New York, NY) in Feb 2015
Interview
The interview process consisted of one Skype interview followed by a day at the office that consisted of three separate in-person interviews. The interviews in person were a mix of typical technical interview questions as well as more theoretical questions that were answered in a more conversational manner. All three interviewers were relaxed and friendly, and they all seemed very enthusiastic about the company itself. The offer I received was rather generous, in my opinion.
Interview questions [1]
Question 1
How would you go about writing a Ruby class responsible for interpreting data and outputting queries to a statistical program written in R?