I applied in-person. The process took 2 days. I interviewed at ElasticBox
Interview
Three separate interviews, the first and second interviewer asked mostly about my past experience and how it relates to the position. The third interviewer asked me about 5 difficult mathematical riddles.
Interview questions [1]
Question 1
You have two buckets. One holds exactly five gallons and the other three gallons. How can you measure exactly four gallons of water into the five gallon bucket?
Assume you have an unlimited supply of water and that there are no measurement markings of any kind on the buckets.