iOS App Upload and Customization

I'm seeking an experienced iOS developer to assist with both uploading a new app to my Apple Developer account and customizing a Codecanyon app. The customization involves integrating third-party services, specifically payment gateways, before installation and publication on the App Store.

Key Requirements:
- Upload and publish a new app to the Apple Store
- Customize the Codecanyon app by integrating payment gateway services
- Install the customized app on my Apple Developer account

Ideal Skills and Experience:
- Proven experience with iOS app development and App Store submission
- Expertise in integrating third-party services, particularly payment gateways
- Familiarity with Codecanyon apps and customization
- Strong problem-solving skills and attention to detail

Please let me know if you can handle these tasks, what access or information you would need from me, the estimated timeline, and the cost involved. Looking forward to your reply!