fix some bugs and add some features to a react native app

This is an Android app made for a POS. This app is to be used by restaurant waiters, so they can select and sell menu items quickly.

We only ever need you to do code: devops is at our responsibility. We'll provide documentation for everything, as well as support to set your environment.

feature implementing:

- payment integration with Pagseguro and Stone (credit, debit and PIX)
- properly print receipts after purchase
- show purchase list on a already created menu screen

bug fixing:

- app should keep working, even if there's no internet connection
- make sure data is synced with after every purchase

REQUIRED SKILLS

- react native
- postgresql
- nest.js
- Java