I applied through university. The process took 1 day. I interviewed at Altiscale (India, TX) in May 2015
Interview
First there was a Coding Interview, where I was asked to implement a program. Then my written program was discussed in my Technical Interview along with some basic DS/Algorithms question.
Interview questions [1]
Question 1
Reaching from one 4 digit prime number to another with only 1 digit changes at once, and all intermediate no. prime as well.