You should know both Rails and React.
What you need to do is to implement API from backend(it is Rails and now used for mobile app). Frontend part is almost ready by last developer. You need to complete the webapp and launch it.
29 фрилансеров(-а) готовы выполнить эту работу в среднем за $624
Hello, How are you? Thanks for your job posting. I have more than 3 years of experiences in ROR and 5 years of experiences in React.js, so I can help you on this project. If you are interested in me please message me.