Good sound knowledge of Flutter(Read Description)

I am looking for a developer with good sound knowledge of Flutter to complete my project The specific features and functionalities needed in my app are advanced and custom features tailored to my specific needs. I have specific design preferences for my app and require a developer who can work with me to achieve my desired design. Ideal skills and experience for the job include expertise in Flutter, app development, and UI/UX design.
1. I already have code with some functionality implemented.
2. Stripe implementation needed for recurring payment.
3. Hypertrack implementation for live tracking need.
4. UI enhancement needed.