Tabletop RPG writer needed for help fleshing out a game concept.

Hi, I'm Adam, a creative director and long-time tabletop RPG player, working on my first self-published "core book" of a new system. I'm looking for a great collaborator as I dimensionalize the mechanics, structure, and game world of my urban fantasy-with-a-twist story game.

I'm looking for a writer with tabletop RPG experience and ideally a background in art, philosophy and game mechanic creation. A tall order, I know, but hey let's see if this platform can do its magic.