Yahoo's recruiting team handles the initial screening, and also makes sure that you're only interviewing with one team at a time to avoid competing offers. The recruiting team is pretty efficient at handling the scheduling and communicating to you all of the details of where to show up, and who you will interview with. The actual interviews were with the hiring manager, a peer on the product team, and the engineering and UX design leads that work directly with that product team. I remember being disappointed in their interview questions, because they seemed too basic and straightforward - I expect that in a phone screen, but they didn't ask anything that would really separate a great candidate from those that just met the basic qualifications. They were all very nice people, but I realized it wouldn't be the right kind of challenging experience, so I passed on the opportunity.