Job listing lets the cat out of the bag.
The listing expresses a need for an experienced programmer of both home console and cell phone games, but also states (arrows included): ">>> Staff wanted for a new development in the Metal Gear series!!<<<"
There's zero info on what this "new development" in the MGS series might be, but it looks like Konami is at least working on something behind closed doors.
What could the game be? Share your thoughts in the comments section below.