Shopify Integration Services

Most Shopify problems that look like store problems are actually integration problems. The inventory that oversells, the orders that don’t reach the warehouse, the finance team re-keying numbers by hand: none of that is fixed in the theme. It’s fixed in the plumbing between Shopify and the systems around it.

We’re a Shopify-focused agency with 14+ years on the platform, and we build that plumbing as real software. Every integration ships with retries, idempotent writes, and observability, because the failure mode that matters isn’t the happy path, it’s what happens at 2am when a webhook times out and nobody’s watching.

Integrations We Build

We connect Shopify to the systems a growing store depends on. Each one has its own quirks, so we design the sync per data flow rather than forcing everything through one mode.

ERP integration

Custom connections to ERP systems like NetSuite, Microsoft Dynamics 365 Business Central, and SAP. Products, inventory, orders, and fulfillment status kept in sync so your finance and operations teams stop re-keying data between systems. Because we build the integration rather than reselling a rigid connector, we map the fields and rules your business actually runs on.

3PL, WMS, and carrier integration

Order and inventory sync with third-party logistics providers and warehouse systems, and live carrier rates at checkout and automated label dispatch. This is the layer that decides whether fulfillment scales cleanly or turns into a manual bottleneck as volume grows.

CRM and marketing sync

Customer and order data flowing into your CRM or marketing platform so segments and flows fire on real behavior rather than stale exports. This pairs closely with our Klaviyo email marketing work when the goal is retention revenue.

Marketplace and POS sync

Inventory and orders reconciled across marketplaces, in-person point of sale, and your Shopify storefront, so a sale in one channel updates stock everywhere without anyone reconciling spreadsheets by hand each night.

Custom API integration

When the system you need to connect has no off-the-shelf app, we build against Shopify’s Admin and GraphQL APIs directly, with webhook handling that survives retries and outages. This is the same discipline behind our custom app development, applied to the connection layer.

Why Integrations Break

Most failed integrations share a root cause: they were built as a script, not as software. A script fetches data and writes it once. It has no memory of what already synced, no plan for a timeout, no way to tell you it stopped working. So it runs fine in the demo and fails quietly in production, and you find out when a customer complains.

So we build the boring parts, the ones that keep an integration alive after the launch call.

Writes are idempotent, which means a replayed webhook doesn’t double an order or corrupt an inventory count. Transient failures, a rate limit or a brief outage, retry with backoff and recover on their own instead of dropping data on the floor.

Observability is the piece merchants underrate until the day they need it. We can see exactly what synced and what didn’t, so a problem arrives as an alert rather than as a surprise on next month’s spreadsheet. Missed or out-of-order webhooks get reconciled too, because Shopify doesn’t guarantee perfect delivery and a naive listener will silently lose events.

We build on Gadget.dev, which provides the managed infrastructure and background job handling this kind of work needs, so the reliability sits in the foundation rather than bolted on after the first outage.

Proof: Integrations Running in Production

Custom Shopify app

Manual order routing, eliminated

The global leader in chemical-free decaf runs a marketplace where every order routes to an independent roaster. Routing on metaobjects, live carrier rates per origin, automated label dispatch.

See the Swiss Water project →

Marketplaces + POS sync

Thousands of SKUs reconciled across every channel

A home-improvement brand selling across multiple marketplaces and point-of-sale systems. Inventory and orders kept in sync in an Arabic-language setup.

See the Housemart project →

“Victoria Garland brought invaluable Shopify expertise and helped us streamline our process. They’ve truly been a great partner, and we continue to work with them.”

Who you'll work with

Victoria Garland Owner and Chief Creative Officer 13 years on Shopify

Alex Massaad CTO and Co-Founder 14 years on Shopify

You scope the project with the people who build it. The developer on the kickoff call is the developer on launch day.

What an Integration Costs

Pricing tracks complexity, not page count. A single well-defined connection (one system, a clear data flow, standard fields) usually starts in the low five figures. A multi-system setup, say an ERP and a 3PL with conflict rules about which system wins, costs more because the business logic is where the real work lives. We scope after mapping the systems, so you get a fixed number before any code runs rather than an open-ended hourly meter.

Related Services

• Shopify app development when the integration needs a full custom app around it.
• Shopify Plus agency for enterprise ERP and B2B integrations on the Plus tier.
• Platform migrations when systems need re-integrating after a replatform.
• Fractional ecommerce CTO to own architecture across a complex, multi-vendor stack.
• Ecommerce consultant to place the integration inside a wider operations and growth plan.

Get a Fixed Quote

Tell us the systems you’re connecting, roughly how much data moves between them, and where the current setup hurts. We’ll map it, tell you honestly whether it’s a stabilize job or a rebuild, and come back with a fixed quote. Get a fixed integration quote.