Shopify connected to the systems that actually run the business: ERP, warehouse, accounting, marketplaces and POS. Catalog, stock, orders and customers moving both ways, with nobody in the middle copying data.
The problem
The store says three units are available, the warehouse says none, and the accounting says nothing at all. Each system holds part of the truth, and somebody reconciles them by exporting spreadsheets.
How it works
One integration service holds the mapping between Shopify and each system, listens to webhooks, respects Shopify's rate limits and retries with idempotency, so a repeated event never turns into a duplicated order.
Impact
Stock that matches the shelf, orders that reach the warehouse without being retyped, and a log that explains exactly why a record looks the way it does.
A SKU in Shopify, a code in the ERP and a reference in the warehouse are three names for one product. That correspondence is written down first, because an integration built without it works in testing and falls apart on the first exception.
Shopify notifies changes as they happen and limits how fast you may answer back. The queue exists precisely for that: a launch that fires thousands of events does not lose any of them, it just takes longer to drain.
Webhooks arrive more than once — that is normal, not a failure. Every operation carries a key that makes it safe to repeat, which is what stops a network hiccup from creating the same order twice in the ERP.
Each record shows where it came from, when, and against which rule. What could not be synchronised is listed instead of being silently dropped, and the alert reaches a person rather than a log nobody opens.
ERPs, warehouse systems, accounting, marketplaces and physical POS — in practice, anything that exposes an API or can drop a file somewhere. The work is rarely the connection itself; it is the mapping and what to do when the two sides disagree.
If your case is standard, do exactly that — it is cheaper and Parmontech will say so. Custom work earns its place when the fields do not line up, the rules are yours, or two systems have to stay consistent in ways no generic app models.
Nothing is lost. Events queue up and retry when the other side comes back, and because every operation is idempotent, replaying them does not duplicate anything.