add features to Flutter canyon full sorce code

I need a skilled Flutter developer to add new features to my existing Canyon full source code from FluxStore. The following features need to be added:

- one new currency options
- Ability to upload files on product
- Delivery date feature
- Gift message option

the app not have Admin//backend its syncs with magento admin panal

I have an existing design and wireframes for the new features. However, I would like the freelancer to provide design options as well.