Multi-Platform Food Delivery App Integration

I'm seeking a talented app developer to help build a food delivery app supporting both iOS and Android platforms.
Key Features:
- Payment gateway integration
Here are the specific skills and experience needed for this job:
- Proficient in both iOS and Android app development
- Experience in payment gateway integration, specifically Mastercard
- Knowledgeable in creating seamless, user-friendly interfaces
- Strong understanding of app security measures
I look forward to receiving your bids.