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When a customer registers, information is synced to multiple systems behind the scenes. This process is fully automated, and customers are registered across multiple systems without being aware.
Sync Flow Details
Step-by-Step Flow
Customer enters required info in registration form and clicks submit button
Server validates input data (email format, required fields, etc.)
Create customer via Shopify Admin API. Save basic info and metafields
Get customer ID issued by Shopify (this becomes the master key)
Register Shopify customer ID as member number in POS system
Sync customer info to CRM for marketing (optional)
Send welcome email to customer and display registration complete screen
Data Flow Diagram
Name, email address, furigana, birth date, etc.
Data conversion and distribution (temporary processing only)
Basic info, metafields, address, customer tags
Member number (=Shopify ID), name, email
Contact, purchase history, tags
Registration Content for Each System
Information Saved to Shopify
Information Saved to POS
Processing Time and Customer Experience
Time Required for Sync
Estimated times when calling each API sequentially.
Customer will see "Registering..." screen for about 2 seconds, so loading display is important to communicate wait time.
What Customer Sees
Enter required info, click submit button
"Processing member registration..." displayed for about 2 seconds
"Registration complete" "Welcome email has been sent"
Redirect to my page after registration complete
Error Handling Approach
Error Types and Responses
Priority-Based Design
Logging and Monitoring
Information to Record
Admin Notifications
Notify admin immediately when critical errors occur.
- When POS sync fails consecutively
- When processing time exceeds 3x normal
- When duplicate registration attempted with same email address
Benefits of This Mechanism
For Operations
- No manual data entry required at all
- Elimination of human errors
- Processing status visibility and tracking possible
For Customers
- Single entry completes registration across all systems
- Immediately usable as member both online and in-store
- No duplicate information entry required