application auto registering

I need an application auto registering. This bot must monitoring the site. and when this site is open , start registering proccess and save confirmation page This application must can work parallel (for example 500 register in a moment). This site opens in about 5 seconds per day and all work must be done at this time. i have to tell : there are some competitor in the site , due to this for me speed is very important . i dont pay Initial milestone, I will pay 50% when tested beta version, and 50% on time delivery If you can do it and accept these terms , bid on this project please best regards