Shopify Auto QR Code Integration

I sell digital products through Shopify and want every completed checkout to trigger an automatic QR code that holds the customer’s name, email address, and order number. The code should be generated the moment the transaction succeeds, attached to the order confirmation email, and stored in the admin panel for later reference.

Here’s the flow I’m after:
1. Customer pays → Shopify confirms the order.
2. A script or app calls the Shopify API, pulls the relevant customer fields, and passes them to a QR-code generator (any robust library such as Google Charts, qrcode.js, or a server-side alternative).
3. The QR image is embedded in the confirmation email template and saved to the order’s metafields so staff can re-download it if needed.

Please keep everything native to Shopify wherever possible—Liquid, Webhooks, and Admin/API access—so the solution survives theme changes and future updates. If an external server or app is required, SSL and basic obfuscation of the API key must be in place.

Acceptance criteria
• QR code encodes customer name, email, order number exactly.
• Code appears in the confirmation email without delaying its send-time.
• QR image stored in an easily accessible order field.
• Clear setup instructions and minimal manual steps after install.

If you have an existing Shopify app or a lightweight private app approach, even better—I’m open to whichever path achieves the above with reliability and clean code.