Cross-Platform E-commerce App Development

I need an experienced app developer to create an e-commerce app for both iOS and Android platforms. The project needs to be completed within a month.

Requirements:
- User-friendly interface
- Secure payment gateway integration
- Product search and filter options
- User reviews and ratings
- Order tracking system
- Push notifications for offers and updates

Ideal Skills:
- Proven experience in e-commerce app development
- Strong knowledge of both iOS and Android development
- Expertise in UI/UX design
- Familiarity with secure payment systems
- Ability to deliver within a tight deadline

Please provide a portfolio showcasing similar projects. Looking forward to your bids!