Steam api program

I am looking for a talented programmer to develop a program for Windows that can log into Steam on multiple accounts at a time, and join CS:GO idle servers automatically to collect item drops. It could include a web interface, but this is not mandatory - it should be something that the programmer can determine based on the specifics of the project. I am unsure which programming language to use for this program, so I am open to the programmer’s recommendation and I'm unsure how much it would cost as I dont have too much experience with programming. The project should be designed to meet my specific needs. Thank you in advance for your help!