I may not be a good chess player, and I have never created a Twitch extension, but the project seems really fun :)
My bid is low because I have never done it before, so I can't ensure how much time will it take, and I don't know the problems I will encounter, nonetheless I can ensure the quality of the end product will be the best I can provide. I would love to work for this project, so, if you like the offer, feel free to contact me.