After talking with HR I had a couple of technical interviews. First one with VP and CTO and second one with a group of senior devs. Don't remember now exact questions but they were easy interviews. I didn't find any question really difficult probably due to my experience and being interviewed because a referral. The main focus of the interviews were around my experience.... No tricky questions. The whole process were very relaxed. Very nice people. Since first interview I got an offer in 15 days aprox. I remember it took longer because HR guy was on vacations.