AppleInsider points to a new Apple job listing that appeared on Monday looking for a software engineer to work on a "revolutionary" new Mac OS X feature.

We 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.

While Apple is always very careful to not give away too much information about its product development plans in its job posting and this latest one is sufficiently vague that it is impossible to glean any real details on the new feature from it, the new listing does carry a sense of enthusiasm and intrigue not often found in Apple's job postings.

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.

About the only hint of the new feature's focus comes from Apple's qualification preferences seeking engineers experienced in HTTP and related protocols, with suggestions of a large-scale Internet-focused perspective.

Evidence of Apple's work on Mac OS X 10.7 first appeared late last year, with increasing evidence of the OS being used on Apple's campus showing up in web logs beginning in January of this year. Hopes for a developer preview at this year's Worldwide Developers Conference were dashed, however, with the event being primarily focused on the iOS platform amid claims that Apple had diverted resources from the Mac OS X in order to focus on iOS 4 development.