Dr. Appointment App Revamp -- 2

I'm seeking a skilled developer to modify and enhance my existing doctor appointment application. The project requires a mix of feature integration, bug fixing, and aesthetic changes.

Key Tasks:
- Modify existing features: Color theme, splash screen, and signin/signout functionality.
- Implement new features: Payment gateway (Razorpay), Profile page, and interconnection of existing features with 2 apps and 2 panels.
- Fix bugs and ensure smooth functionality.
- Develop and apply APIs where required.
- Ensure seamless interconnection of existing and new features within two panels and two apps.
- Set up and integrate a payment gateway.
- Login/logout functionality and, if necessary, a profile page.
- Thorough testing and deployment on both Android and iOS platforms.

Ideal Skills and Experience:
- Mobile app development experience in flutter & larawell, especially in Android and iOS.
- Strong background in API development and integration.
- Familiarity with Razorpay and other payment gateways.
- UI/UX design skills for a cohesive and modern app experience.
- Proven bug-fixing capabilities and a keen eye for detail.
- Experience in deploying apps on Google Play Store and Apple App Store.

Please provide examples of similar work done in your bids. Looking forward to your proposals!