Developer needed to improve progressive web app -- 2

I have a trivia-style web app that needs various changes in admin functionality and overall UI/UX & graphic design. I want someone who has experience developing mobile-friendly web apps and is able to work within the backend framework already in place so I don't have to start from scratch. The site was built using React Native framework and is currently hosted on Heroku. I first need help fixing my hosting so the site is visible again, then I want to build out a backend database for me to easily upload and edit questions posted to the site. Reach out if interested.

Project ID: 39742678