Engineering elbdampf: Custom Shopify E-Cigarette Storefront & Amazon SP-API Connector for Stock, Orders & Tracking
“Parallel Loop built our Shopify store and the Amazon connector we needed: prices and stock stay synced, orders land in Shopify, and tracking goes back automatically when we ship.”
elbdampf is a Shopify ecommerce brand that sells e-cigarettes direct to consumers in Germany. The team needed a polished storefront on elbdampf.de and a dependable connector between Amazon and Shopify so marketplace operations do not drift from the catalog they manage every day.
The Omnichannel Challenge
Parallel Loop delivered elbdampf end to end: a complete custom Shopify website and a connector system that links Amazon and Shopify for price, inventory, orders, and tracking. Regulated product categories still demand accurate stock and fast fulfillment signals on Amazon. elbdampf required Shopify as the merchandising hub, scheduled pushes of price and stock to Amazon, order ingestion into Shopify for warehouse teams, and SP-API tracking when shipments complete. One full-stack developer and one Shopify developer owned the theme and connector build.
- Generic Shopify Theme
- Manual Amazon Price & Stock Updates
- Amazon Orders Re-Keyed in Shopify
- Tracking Uploaded Late or Missing
- No Automated Connector Monitoring
- Custom Shopify Theme on elbdampf.de
- Amazon-Shopify Connector Service
- Shopify to Amazon Price & Stock Push
- Amazon Orders Imported to Shopify
- SP-API Tracking on Fulfillment
Phase 1: Custom Shopify Storefront
We developed a complete Shopify website on a custom theme tailored to e-cigarette merchandising. Collection layouts, compliance-friendly product presentation, and mobile checkout paths help shoppers browse devices and consumables confidently. The Shopify developer worked with our full-stack engineer so theme metafields, variant rules, and checkout UX align with the connector jobs running behind elbdampf.de.
Our custom ecommerce tools and custom software development approach keeps brand experience in Shopify while operational sync flows through Node.js services the operations team can trust.
Phase 2: Amazon-Shopify Connector & Fulfillment Loop
We created a complete system connecting Amazon and Shopify: import prices and stock from Shopify to Amazon, pull Amazon orders into Shopify, and send tracking to Amazon when orders fulfill. The connector runs as Express APIs and Agenda Jobs on AWS EC2, batching catalog updates while respecting SP-API limits. When Amazon sells a unit, the service creates or updates the matching Shopify order for picking and packing. On fulfillment, tracking posts back through Amazon SP-API so buyer and seller metrics stay current.
PostgreSQL stores sync state, SKU mappings, and audit logs. MongoDB captures job telemetry and retry metadata at volume. React and Next.js support internal views where staff monitor connector health without juggling separate carrier admin panels.
- Storefront: Custom Shopify theme for e-cigarette ecommerce.
- Connector: Unified Amazon and Shopify price, stock, and order flow.
- Catalog sync: Price and stock pushed from Shopify to Amazon.
- Orders: Amazon purchases imported into Shopify fulfillment queues.
- Tracking: SP-API updates when Shopify marks orders shipped.
Quantified Business Outcomes
elbdampf runs Shopify as the brand hub and Amazon as an automated channel with one connector keeping catalog, orders, and tracking aligned.
| Performance Metric | Before elbdampf Stack | elbdampf (Parallel Loop) |
| Shopify UX | Off-the-shelf theme | Custom E-Cigarette Theme |
| Amazon Integration | Manual spreadsheets | Automated Shopify-Amazon Connector |
| Amazon Stock & Price | Manual updates | Automated Push from Shopify |
| Orders & Tracking | Re-keyed, delayed tracking | Shopify Import + SP-API on Fulfill |
Technical Deep-Dive: Frequently Asked Questions
Why is Shopify the source of truth for elbdampf?
elbdampf merchandising, bundles, and direct campaigns live on Shopify first. The connector reads Shopify variant price and inventory, then maps SKUs to Amazon listings. That direction keeps Amazon listings aligned with the catalog operators manage on elbdampf.de daily.
How do Agenda Jobs keep the connector reliable?
Scheduled jobs batch price and quantity updates, respect SP-API throttles, and write outcomes to PostgreSQL. Failed runs retry with backoff while MongoDB logs capture payload snapshots for debugging without blocking the storefront.
When does tracking post back to Amazon?
When fulfillment staff mark a Shopify order shipped, webhooks or polling detect the event, Express loads carrier and tracking numbers, and SP-API confirms delivery to Amazon. Amazon buyers and seller performance dashboards update without manual CSV uploads.
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