E-commerce App Development

I'm looking for an experienced mobile app developer to build an e-commerce app available on both iOS and Android platforms. The app should integrate a payment gateway and offer real-time order tracking. Key requirements: - Payment gateway integration - Real-time order tracking - Available on both iOS and Android Ideal skills and experience: - Proven experience in developing e-commerce apps - Strong knowledge of payment gateway integration - Familiarity with real-time tracking technologies - Proficient in both iOS and Android app development Please provide samples of previous work.