Dear Employer,
I have experienced in developing information communicating system of remote-healthcare and video streaming projects for 7 years, you can see my profile for more information about me. Your requirement I met in my past works, and these all of them are big tasks. So I propose my bid plan by my experiences for reasons of security, maintenance and reliability of a system, please check the proposed milestones for the details. From your project title, "a website using React.js", I think you just need front-end pages, right? Please note that all the milestone tasks I list are only for front-end web pages development, not include back-end server. Thank you.
Regards,
Ben