Hi there! I would love to work with you on this project as this is an area I specialise in, it sounds like you have an issue with client-side JavaScript compatibility on IE11 (more of an issue with React than IIS). The price would be $200 and the delivery time would be a maximum of 7 days. I have a Bachelor's degree in Computer Science, experience working in Silicon Valley, and have only 5-star reviews here on Freelancer. I look forward to hearing back from you! Berel
Btw Source Code is Included