Add sub child category in flutter

I am looking for a Flutter developer to add a sub child category feature and in product view addon should be auto selected to my current app. My category structure includes both parent and child categories. I have a specific design in mind for the sub child category display, and it is a high priority feature addition for my app.

Ideal skills and experience for this job include:
- Flutter development
- Knowledge of category structures
- Ability to implement custom designs
- Strong communication skills to ensure the feature meets my expectations and is delivered on time.