React based e-commerce mobile application error fixing and update

Hi, We have a e-commerce mobile application here [login to view URL] . This app is actually working with our e-commerce system through API. Everything is working fine just few issues need an update. Our mobile developer is sick and need someone reliable to fix some existing bugs and make sure small improvement on current UI/UX. The task not big just some simple task for those who are skilled on React Based Mobile APP. If you can update the app successfully we may run a long term relationship with this app as we have several clients where the app need to deploy with cloning .... Full Work Scope can be found here : 1. Update some profile layout 2. Update checkout logic and API response 3. Fix wallet balance spending policy 4. Dynamic Shipping Calculation error 5. Some other small things Hope it will helps you to understand project scope, The rest we will discuss.