A new job posting by Apple (http://macosg.me/2/mb) says the company is looking for a software engineer to help build a “new and revolutionary feature for Mac OS X. ” Of course, it doesn’t say what that feature is.

But here’s part of the job description: “Are you looking to help create something totally new? Something that has never been done before and will truly amaze everyone? Are you excited by the prospect that what you helped create would be used every day by millions of Apple customers? Then come and work on with the Mac OS X software engineering team to help build a new and revolutionary feature for Mac OS X.

“WWe are looking for a senior software engineer to help us create a revolutionary new feature in the very foundations of Mac OS X. We have something truly revolutionary and really exciting in progress and it is going to require your most creative and focused efforts ever.

“An ideal candidate will have a degree in Computer Science (or equivalent), five years of professional experience developing C / C++ / Objective-C libraries or frameworks for use on end user systems, experience with developing for Internet technologies and services, and a passion for doing ‘really hard’ things that have never been done before.”

“An exceptional candidate will also have up close and personal experience with the HTTP protocol as well as other protocols layered atop it, have participated in or lead the architecture of large web scale systems, have shipped multiple “platforms” for use by millions of user.”