Shopify Integration Services
Senior engineers connecting Shopify and Shopify Plus to the systems your business already runs on — Klaviyo, NetSuite, HubSpot, Xero, QuickBooks, Amazon, and Salesforce. Webhook-driven, idempotent, and built to survive a Black Friday order spike.
Our integration process
- Map the data. We document every object that crosses the boundary — orders, customers, inventory, fulfilments, refunds — and where it's the source of truth, before any connector is written.
- Build the connector. Custom app or middleware picked to the brief: Shopify webhooks + Admin GraphQL on one side, the target API (Klaviyo, NetSuite, Xero, etc.) on the other, with retries and idempotency keys so a duplicate webhook never doubles an order.
- Reconcile + test. Replay a representative sample of real orders through the integration, diff the result against the source system, and verify edge cases — partial refunds, multi-location inventory, tax lines — before go-live.
- Monitor + support. Dead-letter queue, alerting on failed syncs, and a scoped support window agreed in writing. An integration that silently stops syncing is worse than no integration — we instrument for that.
Integrations we build
- Klaviyo integration — real-time event sync (checkout started, ordered, fulfilled) and back-in-stock flows that fire on the right webhook, not a nightly batch
- NetSuite & ERP integration — orders, inventory, and fulfilment synced bi-directionally with idempotent, reconcilable jobs
- Accounting integration — Xero and QuickBooks: orders, payouts, refunds, and tax mapped to the right ledger accounts automatically
- CRM integration — HubSpot and Salesforce: customers, orders, and lifecycle stage synced so sales and marketing see live commerce data
- Marketplace integration — Amazon listing, inventory, and order sync that keeps stock honest across channels
- Idempotency, retries, and dead-letter handling on every connector — no duplicate orders, no silent sync failures
Integration timeline
Scoped per integration
A single well-documented integration (Shopify ↔ Klaviyo, Shopify ↔ Xero) is typically 1-3 weeks. A bi-directional ERP integration with inventory and multi-location fulfilment (Shopify ↔ NetSuite) is 4-10 weeks depending on edge cases. We confirm a window in writing once the data-mapping scan surfaces the real shape — undocumented custom fields in the target system are where integration timelines actually slip.
FAQ
- Which Shopify integrations do you build?
- Most often Klaviyo (email/SMS), NetSuite and other ERPs, Xero and QuickBooks (accounting), HubSpot and Salesforce (CRM), and Amazon (marketplace). The pattern is the same regardless of the target — Shopify webhooks and Admin GraphQL on one side, the destination API on the other, with idempotency and reconciliation in between. If your system has a documented REST or GraphQL API, we can almost certainly integrate it.
- Do you use an off-the-shelf connector app or build custom?
- Whichever is honest for the brief. For a standard Shopify ↔ Klaviyo or Shopify ↔ Xero link, a well-configured app from the App Store is often the right call and we'll tell you so rather than bill you for custom work. We build custom when the off-the-shelf connector can't handle your data shape — custom line-item properties, multi-location inventory, B2B price lists, or a NetSuite instance with bespoke fields. We scope both options and recommend the cheaper one that actually works.
- How much does a Shopify integration cost?
- A single, well-documented integration typically runs £3K-£12K. A bi-directional ERP integration (Shopify ↔ NetSuite) with inventory and fulfilment sync is usually £12K-£60K depending on edge-case volume. We share firm pricing in writing once the data-mapping scan is complete — the cost driver is almost never the Shopify side, it's how clean and documented the target system's API is.
- How do you stop duplicate orders or lost syncs?
- Every connector uses idempotency keys, so a webhook Shopify retries (which it will) never creates a second order downstream. Failed syncs land in a dead-letter queue with alerting rather than vanishing, and we run a reconciliation job that diffs Shopify against the target system on a schedule so drift is caught in hours, not at month-end close.
- Can you connect Shopify to a system that is not on this list?
- Yes. The integrations we name are the most-requested, not the limit. We have built connectors to bespoke WMS, 3PL, PIM, and subscription platforms. If the system exposes a documented API (or even a stable flat-file export), we can scope an integration. The discovery scan is where we confirm feasibility before you commit.
- Will the integration survive a traffic spike like Black Friday?
- That's exactly what the architecture is for. Webhook-driven event processing with a queue means a sudden order spike fills the queue and drains it in order rather than hammering — and rate-limiting — the target API. We load-test the connector against a representative peak before go-live, and the retry + dead-letter design means a brief downstream outage is recoverable, not lost data.