Valve Steam Trading

Hi ladies and gentleman, I need programmer who knows about about steam function ([login to view URL]) need to build an automation trading bots on website to do auto trading. The trading listed item is only 10 category of SKU: Andy wanted Sword, add bot for sword, bot with sword will add Andy for trade. Functionality: Item Sword <--> Shield or Shield <--> Sword or 5 coins <--> 1 Sword or 1 Shield <--> 5 coins. I want to be able to manage my bots easily and can change the rate from time to time. do bid here if you are not only interested but you know what you can do. I need people who can advise me on the IT Hardware site for bots to function. I'll further engage the person who completed this for maintenance, thus this don't end here.