E-commerce App Development for iOS & Android

I'm in need of a professional app developer who specializes in creating top-notch E-commerce applications. The app should be compatible with both iOS and Android platforms. The ideal candidate should have a strong background in app development, with a proven track record of delivering high-quality, scalable code, and resolving complex programming issues efficiently.

Key Requirements:
- Expertise in E-commerce app development
- Proficiency in both iOS and Android app development
- Ability to write clean, scalable code
- Quick, professional implementation
- Provision of technical support and modifications to ensure complete satisfaction

I need a comprehensive programming solution that caters to all my requirements. Ready to start immediately!