gamer programmer

I'm looking to build a multi-ranking system where a user plays a game and gets ranked based on a score and another variable...User will be ranked amongst other users competing instantaneously. Must be updated in the system instantly with no delays so all users sees the updated rank and score all the time instantly. There must be no delays in the system no matter how many people playing the game. "Serious coders only" who know what they are doing ...prior to starting I would like to see your prior experience wether you are capable of doing the job. The code must be customized in php. For coders who say you can and can not please do not post a price! Thank you