Like many other postings here, I applied online for the application support engineer and was emailed shortly afterwards with a request for a phone interview. The first interview was very preliminary with basic HR questions along the lines of work eligibility and gauging my interest in the position. A technical interview was scheduled two weeks later covering linear algebra, both general and language specific programming, and in my case, control theory. Questions were very elementary as it seems they are only checking to make sure your degree is legitimate. The control theory questions were entirely specific to undergrad level linear systems and the math was high school level stuff. A little later I was invited to visit Natick and am currently awaiting the on-site interviews.

There were three phases for recruiting procedures. The first stage was a brief and relaxing conversation, the second stage was about technical things and hiring manager asked several questions in the third stage.