Fresh grocery store mobile app and website with real-time database

I am looking for a developer to create a fresh grocery store mobile app and website with a real-time database. The following features should be included:

- Online ordering: Customers should be able to browse and order groceries through the app and website.
- Delivery tracking: Customers should be able to track the status and location of their delivery.
- Inventory management: The app and website should have a system to manage and update the inventory in real-time.

The mobile app should be available on both iOS and Android platforms. As for the real-time database, I am open to suggestions on the best option, whether it be Firebase, MongoDB, or any other suitable choice.

Ideal skills and experience for this project include:

- Proficiency in developing mobile apps for both iOS and Android platforms.
- Experience in building e-commerce or online ordering systems.
- Knowledge of real-time database technologies and their implementation.

Please provide examples of previous work and any relevant experience in your proposal.