According to a job posting on Microsoft's website that was taken down, the company is looking for a software engineer with server experience to work on its next-generation platform, officially confirmed to have the codename Xenon.
"Want to help create a new feature for Xenon not available on any other platform? Microsoft Game Studios Publishing is looking for an SDET with server experience," read the now defunct career page. The hire would create "a spectator mode for many Xenon games, Xbox TV, with tickers at the bottom of the screen featuring recent high scores and game highlights, a tournament system, and tradable trophies."
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News source: GamePro