Shopify-eSIM Integration Development

I need a skilled developer to connect Shopify with esimgo services via API. This integration will allow customers to purchase prepaid eSIMs directly through our Shopify store.

Key Requirements:
- Secure API connection between Shopify and esimgo.
- Customer authentication setup (email/phone verification).
- Delivery method for eSIM details post-purchase (email/SMS/download).

Ideal Skills:
- Experience with Shopify API.
- Familiarity with eSIM provisioning systems.
- Strong background in secure payment processing and customer authentication.

Please provide examples of similar work done and ensure a smooth, user-friendly purchasing experience.