I applied through an employee referral. The process took 2 weeks. I interviewed at Jana Mobile (Boston, MA) in Sept 2015
Interview
Coffee chat with a senior engineer, then some at home coding exercises, followed by an onsite interview consisting of interview / white-boarding sessions with four teams of two employees, each lasting about an hour. Very friendly atmosphere. Good balance between technical skills / white-boarding questions and more personal questions. Interviewers were helpful in answering my questions and made themselves available for further questions after the interview.
I applied online. The process took 2 weeks. I interviewed at Jana Mobile (Boston, MA) in Oct 2017
Interview
Talk with VP of engineering, then some at home coding exercises, expect them to make you waste some time until the code is to their liking, followed by an onsite interview consisting of interview 1-hour sessions with teams of two employees. Expect a few very arrogant people and a few irrelevant questions.
I applied online. The process took 1 week. I interviewed at Jana Mobile (Boston, MA) in Mar 2016
Interview
Was contacted via email very shortly after applying, followed by a short over the phone coffee chat, then followed by at home coding challenge with peer review. Brought in for on-site interview with 3 one hour sessions with pairs of employees, technical whiteboard questions in every session along with personal/resume questions.
Interview questions [1]
Question 1
What you would expect for technical questions with optimization (Big O) needed; searching, caching etc...