iOS E-Commerce App Development

I'm in need of an experienced mobile app developer who can create a professional iOS e-commerce application for me. The app should primarily feature a comprehensive product catalog, showcasing all my products in an engaging and user-friendly manner.

Key Features:
- A seamless, intuitive product catalog
- Secure, efficient Email and password user authentication

Ideal Skills and Experience:
- Proven experience with iOS app development, particularly in the e-commerce domain
- Extensive knowledge in creating engaging product catalogues
- Expertise in implementing secure user authentication processes
- Excellent understanding of UI/UX principles for iOS

Please share your portfolio with similar projects and your proposed timeline for this task.