This recent job posting sounds interesting:
https://jobs.apple.com/us/search?#specs&t=1&so=&j=DES&lo=0*USA&pN=2&openJobId=26917597
Interface Designer
Job Number: 26917597 Santa Clara Valley, California, United States
Posted: Apr. 5, 2013 Weekly Hours: 40.00
Job Summary
The Human Interface Device Prototyping group at Apple is looking for an Interface Designer. Were a small, unique group at Apple composed of hybrid designers / engineers. We work on the long-term vision for human interface technologies and user experience across all of Apples products.
Key Qualifications
Required Skills
Sketching / storyboarding of UIs
Visual design using Photoshop, Illustrator, or similar tools
Designing for touch or mobile interfaces such as iPhone and iPad
Creating interactive prototypes using Flash, Processing,
OpenFrameworks, Quartz Composer, or similar tools
Motion graphics, 3D graphics, special effects, or animation
Description
Invent We come up with novel ideas for how new hardware technologies can improve the user experience. You should have a passion for building new things and running with ideas.
Design
You should have a proficiency in illustration, an understanding of user interface principles, a sensitivity to typography and color, a general awareness of materials textures, and a practical grasp of physics and animation.
Prototype
We build working, interactive prototypes to test, explain, and explore ideas. Our process includes sketching, pixelperfect mockups, animations, code, electronics, and models. You should be able to explore ideas at many different levels of fidelity, and be interested in making interactive prototypes.
Collaborate
We work with people all over Apple: UI designers, industrial designers, engineers, marketing, and executives. You should be comfortable working in a studio environment and participating in individual and group critiques.
Present
A big part of what we do is demonstrate our prototypes and explain our designs. You should be comfortable speaking to your work in front of small and large groups.