React Native Payment Fix

I'm seeking an experienced React Native developer to resolve an issue with our app's payment gateway.

Key Requirements:
- Expertise in integrating payment gateways
- Experience in troubleshooting transaction failures, integration problems, or security concerns.
- Familiarity with both iOS and Android platforms.

Ideal Skills and Experience:
- Proficiency in React Native.
- Strong background in mobile app payment systems.
- Problem-solving skills and attention to detail.

Please share your relevant experience and approach to this issue.