Secure B2B Website Development

I'm looking for a skilled full-stack developer to create a secure and scalable B2B website and customer portal. This platform will offer personalized, customizable goods and streamline online ordering processes.

Key Features:
- Customer portal with order history and reordering capabilities
- Integration with existing CRM and payment gateway
- Personalized products, allowing customers to customize their orders
- Robust user access control with multiple roles and permissions
- CSV export for production purposes
- Easy-to-manage admin system designed for future growth, additional products, and marketing capabilities

Requirements:
- Strong full-stack experience in building secure, scalable B2B websites and e-commerce systems
- Clear communication in English with reasonable overlap with Australian business hours
- Transparency on whether the freelancer will personally handle development or subcontract it
- Security-focused development with ownership of all source code/IP ensured
- Ongoing support and milestone-based development process preferred

Please provide relevant work samples and a brief outline of your approach.