Shopify API Development for Australian Commerce Teams
Admin and Storefront API integrations, webhooks and custom endpoints for founders and Shopify Plus teams who need behaviour the platform doesn't ship out of the box, built by a senior AU team, documented and owned by you.
When Shopify's defaults run out of road
Off-the-shelf apps cover the common cases. The moment your commerce logic gets specific, you need the API, and the engineering discipline to use it safely.
The app store has nothing that fits
Your pricing, fulfilment or data flow is bespoke, so no third-party app maps to it cleanly. You're stacking apps and hoping.
Data lives in silos
Orders, customers and inventory need to move between Shopify and your ERP, 3PL or CRM, and manual exports don't scale.
Webhooks that miss or double-fire
A brittle integration drops events or processes them twice, so stock counts and orders quietly drift out of sync.
Rate limits and version bumps break things
An integration built without throttling or API versioning fails silently when Shopify changes underneath it.
No one can explain how it works
A past build left undocumented scripts and private apps. Every change is a risk because nobody owns the logic.
What we handle, what you handle
Clear scope from day one so nothing falls between us.
| Nexly delivers | Your side | Out of scope | |
|---|---|---|---|
| API integration | Design, build, test and document the integration | Access to Shopify admin and connected systems | A full public App Store product (see App Development) |
| Webhooks & sync | Reliable, idempotent webhook and sync pipelines | The business rules and edge cases to encode | Ongoing data entry inside third-party systems |
| Hosting & infra | Recommended architecture and deployment | A cloud account, or approval to use ours | Managing your unrelated internal infrastructure |
| Handover | Code, docs, runbook and credentials handed over | A named owner to receive the handover | Training your team as full-time API engineers |
Is this the right fit
A fit if
- You need commerce behaviour Shopify doesn't offer out of the box
- You're syncing Shopify with an ERP, 3PL, CRM or custom back office
- You're on Shopify Plus, or scaling toward it, and hitting platform edges
- You want documented, owned code, not a black-box script
- You need webhooks and endpoints that stay reliable at volume
Not a fit if
- A standard app from the store already does the job
- You want a full public product for the Shopify App Store, see App Development
- You need checkout logic specifically, see Functions Development
- You haven't launched a Shopify store yet and need the build first
What's involved in Shopify API work
Scoped to your systems and the behaviour you need, delivered senior-led end to end.
What's included
- Admin API integrations (GraphQL and REST) for orders, products, customers and inventory
- Storefront API work for headless and custom front-end data
- Webhook pipelines with retries, verification and idempotency
- Custom endpoints and middleware for bespoke commerce logic
- Scheduled jobs and background sync between Shopify and your systems
Technical deliverables
- Integration pinned to a specific Shopify API version with an upgrade path
- Rate-limit-aware clients with throttling and back-off
- HMAC-verified, idempotent webhook handlers
- Error logging, alerting and a monitored retry queue
- Documentation, runbook and handover of all code and credentials
Technology & integrations
- Shopify Admin & Storefront GraphQL APIs, webhooks and Flow
- ERPs and 3PLs, NetSuite, Cin7, Unleashed, Starshipit and similar
- Node and TypeScript services, serverless functions and queues
- CRMs, ESPs and data warehouses via API or middleware
- Custom apps for scoped, secure access to your store
How a Shopify API project runs
A senior-led path from discovery to a documented, monitored integration.
Discovery & API audit
We map your systems, data flows and the exact behaviour you need, then confirm what the Shopify API can and can't do. Week 1.
Technical design
We specify endpoints, webhooks, data models and error handling, and agree the architecture and scope in writing. Week 1–2.
Build
We develop against a pinned API version with rate-limit-aware clients and verified webhooks. Week 2–5.
Testing & edge cases
We test failure modes, dropped events, retries, rate limits and partial data, not just the happy path. Week 5–6.
Staging & sign-off
You review the integration on a staging store with real-shaped data before anything touches production. Week 6.
Launch & monitoring
We deploy with logging, alerting and a retry queue in place, and watch closely through the first live cycles. Week 6–7.
Handover & support
You receive the code, documentation and runbook, plus an optional support window for changes. Week 7 onward.
How we keep integrations reliable
The controls that stop an API integration from quietly breaking.
- Pinned Shopify API version with a documented upgrade path
- HMAC verification on every inbound webhook
- Idempotency keys so retried events never double-process
- Rate-limit throttling and exponential back-off on all calls
- Structured logging and alerting on failures and data drift
- Dead-letter and retry queue for events that can't be processed
- Secrets stored securely, never in code or client-side
Investment
Every integration is scoped after discovery. Typical AUD bands below to set expectations.
Focused integration
One system, defined endpoints and webhooks
Multi-system sync
Several systems, custom logic and monitoring
Ongoing API support
Retainer for changes, upgrades and monitoring
Shopify API development FAQs
Related services
Need Shopify to do something it doesn't do yet?
Send us the systems you're joining and the behaviour you need. We'll tell you what the API can do and scope it honestly.
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