Small web app that will include dota2 steam api integration.
1) Chat with steam log-in
2) Matchmaking with in-game items betting (using steam for [url removed, login to view])
User will be able to log-in using his steam id, create a match and bet in-game items
5 freelancers are bidding on average $311 for this job
I could integrate the steam module for nodejs for you, fully tested, within 10 days, starting 9th/Sep. You should have at least a VPS and I should be provided with root access to do my job.