Hello,
I have 17 years of experience in development and I worked with many different technologies. I see you have posted this project many times, always with very few bidders. This is probably because Steam API is not a very common knowledge. I don't have experience with Steam API either, but I'm a very fast learner, always eager to learn new technologies. I won't charge for the time spent learning it, just the time spent really doing what you need. I'm very commited and responsible and I always prime for quality. I'm sure I can deliver what you need.
My fee is US$13.00 /h. I can use the Freelance Desktop App if you prefer, or we can set small milestones. I only charge a milestone after it is finished and has your approval.
Please call me to discuss.