$100 Develop features in Flutter App

I am looking for a skilled Flutter developer to help me develop a few features for my app. I have existing code that the freelancer can work with, and I need the feature developed within a week. The ideal candidate should have experience in Flutter development and be proficient in implementing In-App Purchases, familar with app store, firebase, ads monetization implementation, etc.

Specifically, I need the following features:

- In-App Purchases functionality
- Integration with a preferred payment gateway (I am open to suggestions, but would prefer Stripe)
- Firebase events tracking and remote config implementation
-Miscellaneous tasks - adding pop up, different localized versions of apps, making sure the apps promotion campign can run, uploading to app store, ad monetization, etc

Ideal skills and experience for this project include:

- Experience working with Flutter and in-app purchases
- Familiarity with integrating payment gateways, particularly Stripe
- Ability to work quickly and meet tight deadlines
- Communication Skills - responsive clear, and professional manner

If you have the necessary skills and experience, please reach out to me with your proposal. Thank you!