Flutter App Fixes & CC Avenue Integration

I am experiencing several issues in my Flutter app that require troubleshooting and resolution. Specifically, I have been facing issues with:
- App crashes
- Slow performance
- UI/UX issues
- Integration errors

I am also looking to integrate the CC Avenue payment gateway into the app. Currently, the payment gateway is not integrated at all.

The ideal freelancer for this task would have:
- Extensive experience in Flutter app development and troubleshooting
- A keen eye for UI/UX optimization
- Hands-on experience with payment gateway integration, specifically CC Avenue

Your key responsibilities will be:
- Diagnosing and fixing app crashes and performance issues
- Refining the UI/UX
- Integrating CC Avenue as the primary payment gateway within the application

Through this project, we aim to enhance the user experience, speed up performance, and ensure seamless transactions via CC Avenue. Your support and expertise can help make this possible. Please stake your bid, keeping these requirements in mind.

here is the documentation

https://docs.google.com/document/d/1ZEs71toWcWR92LZDdjJ6RTUxn38B7obAbTijpW-fipg/edit?usp=sharing