I was already an Oracle employee in Brazil and applied for jobs in different product development teams at Oracle HQ through internal iRecruitment (which is also available externally at http://irecruitment.oracle.com). Got contacted for some of those applications but my case required L1 visa sponsorship so not every 1st contact was fruitful. But for this particular one, there was green light for international transfers and I went through the interview phase which basically consisted of 4 formal phone interviews, with 4 different interviewers: 2 other software engineers, 1 product manager, and 1 director. Only the 2 engineers made very technical interviews, basically focused on Java and logic, that lasted for about 1 hour each and had a medium-high difficulty level. The other 2 interviews were more about to know my professional experience and objectives and also to let me know more about the job. After that, I got the positive feedback in about a week and then, in my case, the whole approval process for my job offer took more than a month and then, finally, I could start the real transfer process, which took a couple more months and now I'm here and quite happy so far.