I've had one or two interviews where I was really nervous. As others have said, you should be interviewing them - you should be very prepared with lots of questions that will inform you as to what working for this company will really be like, how it will shape your future career, and how you can grow, learn, increase your marketability and salary going forward. Additionally, I also have been in interviews where they make you feel very comfortable. I think this can really be an indicator towards what it will be like to work with (and/or for) them in the future. So if you get nervous, remember that they're probably not doing a good job of making you comfortable, and probably never would while you worked there, either. My current employer gave a relaxed, comfortable interview. We asked each other a ton of questions, and we were OK with human answers like "I haven't learned that yet" or "I'll definitely email you with that information later."