Onsite Interview - friendly environment, interviewed by 5. Not tough. I was in the entry level so asked mostly about my research experience relevant to the position. Some of the interviewers gave a big picture about the company, the work and quite concern about my ongoing academic level research but didn't really got in to specific subject matters. But one person seemed not certain about the level of hard work that I can do and was trying to emphasize the hard part of the job!