Flutter Based Offline POS One Page Desktop Application

I am looking for a Flutter developer to create an offline POS application with the following features:

- Sales tracking and reporting: The application should be able to track and report sales data for analysis and decision-making purposes.

We have some ideas for the design and layout of the application but is open to suggestions.

The application should be cross-platform, compatible with both Windows and MacOS operating systems.

Ideal skills and experience for this job include:

- Strong proficiency in Flutter programming language
- Experience in developing offline applications
- Knowledge of inventory management systems

Flutter Windows based installable application
Sqllite Internal database store offline data
When internet is ON need to push data to server
Store product details in local for POS billing

https://walkingtree.tech/make-your-apps-available-offline-using-flutter-and-sqlite/

I am already done this setup. Someone need to complete based on my requirements