Help me finish my App

I have an iOS app that is about 60% done because the UI/UX is done and I have some code written but I need to re-work it so it functions with new UI and I need to finish it. I need an expert who can do this for $200-300, and can finish it in 1-3 weeks. Experts needed

- Firebase
- Swift
-Adobe XD
- iOS App Store App