Ecommerce Integration Services
Your storefront
Your storefront
runs the front.
Integration runs
the business behind it.
Custom ecommerce integration that connects Shopify Plus, BigCommerce, and headless storefronts to your ERP, customer relationship management system, 3PL, marketing automation, and analytics. Every order, inventory record, and customer event flows where it needs to go, automatically.
Pricing Signal
Single endpoint from $3,200Full stack build from $14,000Architecture audit $800
Submit brief → call within 48 hours → platform brief in 3 days → build starts within 1 week of sign-off
Your team's time across a full ecommerce integration build is typically 2 to 3 hours per week: one schema review, async feedback on data contracts, and a final quality assurance sign-off on the first live sync. We handle everything else.
$70M
Client proof
$0M
in annual ecommerce revenue at Half Price Drapes after integrating Shopify with Dynamics 365 ERP, Power BI, and Klaviyo
Live integration, 42+ endpoints connected
The operational cost
What a disconnected ecommerce stack costs you every day
Each row below is a real operational problem that ecommerce integration solves. The left is what you live with today. The right is what you get after a Redefine build.
Without integration
With Redefine integration
ERP inventory exports manually uploaded to Shopify every morning. Overselling happens when the export is late.
ERP inventory levels sync to your storefront in real time. No manual step, no overselling.
Orders from Shopify re-entered manually into ERP. Errors occur. Finance waits for reports until end of week.
Orders flow directly into ERP the moment they are placed. Finance has live profit and loss data without exports.
3PL picks orders from a manually emailed spreadsheet. Tracking numbers copied back by hand. Delays compound.
Orders dispatch to your 3PL integration layer automatically. Tracking flows back to the customer automatically.
Klaviyo segments built from manual customer exports. Flows trigger on stale data. Campaigns miss windows.
Purchase events and order history from your ecommerce stack feed Klaviyo in real time. Segments stay current.
No single revenue number. Finance has Shopify. Analytics has GA4. ERP has something else. Decisions take a week.
One unified business intelligence layer pulls from all connected systems. Everyone works from the same live revenue number.
Your platform, your integration
The integration stack depends on your storefront. Pick yours.
Every platform has different API surfaces, rate limits, and webhook patterns. Select your commerce platform and see exactly what integration looks like for your stack.
The integration stack every growing Shopify Plus brand needs
Shopify Plus exposes a robust REST and GraphQL API surface. We build integrations for inventory sync, order push-back to ERP, Klaviyo event pipelines, and 3PL dispatch, all against Shopify's webhook and bulk operations layer.
Systems we connect from Shopify Plus
Dynamics 365 ERPNetSuiteKlaviyo3PL / ShipBobPower BISalesforce
Common scenario
ERP inventory pushes to Shopify every 15 minutes. Orders in Shopify create purchase orders in ERP automatically.
Common scenario
Shopify checkout events trigger Klaviyo flows via server-side API. Abandoned cart, post-purchase, and win-back all run from real order data.
Shopify Plus integration:From $3,400 fixed-price
OK /shopify/inventory → ERP → 2,847 SKUs synced
OK /shopify/orders → ERP → 47 orders pushed
OK /shopify/events → Klaviyo → 312 events
OK /shopify/orders → 3PL → 44 dispatched
Next cycle: 14:32:00 (15 min)
2,847
SKUs synced
47
orders pushed
Turn BigCommerce into your command center for multi-channel commerce
BigCommerce's open API architecture makes it ideal for complex multi-marketplace integration. We build custom endpoints for marketplace order ingestion, dropshipping automation, inventory centralization, and analytics feeds.
Systems we connect from BigCommerce
NetSuite or SAPKlaviyoAmazon or eBayDropship suppliersCustom 3PLPower BI or Tableau
Common scenario
Amazon and eBay orders ingested into BigCommerce automatically. Single inventory pool depletes across all channels. Overselling eliminated.
Common scenario
Dropshipping purchase orders generated and sent to suppliers automatically when BigCommerce orders are placed. No manual forwarding.
BigCommerce integration:From $3,600 fixed-price
OK Amazon → BC ingest → 28 orders
OK eBay → BC ingest → 14 orders
OK BC orders → dropship → 19 POs
OK Inventory → all channels → synced
Pool: 14,241 units available
3
channels
42
orders per hour
0
errors
Build the integration layer your composable stack actually needs
Headless commerce stacks have no single source of truth. We design custom API endpoints, server-side event pipelines, and unified product catalog layers that sit between your frontend and every connected backend system.
Systems we connect from headless stacks
Any ERPContentful or SanityCustom CDPCustom checkout APICustom events layerAny BI or analytics
Common scenario
Server-side event tracking layer captures checkout, product view, and cart events reliably, regardless of browser. Events route to CDP, Klaviyo, and business intelligence simultaneously.
Common scenario
Unified product catalog API pulls from ERP pricing, content management system content, and inventory in a single response. Your frontend has one source for all product data.
Headless integration:From $6,400 fixed-price
GET /api/products → ERP+CMS+inv merged
POST /api/events → CDP+Klaviyo+BI
POST /api/checkout → ERP order created
GET /api/tracking → 3PL status live
Latency: 84ms avg, 99.97% uptime
84ms
avg latency
1 API
all sources
What we deliver
Four ecommerce integration outcomes every Redefine build delivers
01 · Inventory
ERP prices and stock counts live on your storefront. Always.
Your ERP is the source of truth for inventory and pricing. We push changes to your Shopify or BigCommerce storefront in real time or on a configurable cycle. No manual exports. No batch files. No overselling. Directly relevant to our Dynamics ecommerce integration work.
From $3,400Live in 14 days
2,431
ERP stock
2,431
Shopify
2,431
BigComm
All channels agree · 8 sec ago
Last update: ERP price change triggered
Order #48821 → 3PL: dispatched
Order #48820 → ERP: invoiced
Tracking: 1Z999AA10 → customer
Klaviyo: shipped flow triggered
No manual step required
02 · Order Fulfilment
Orders go to your 3PL and ERP the moment they are placed.
A Shopify or BigCommerce order triggers a chain: ERP creates the sales order, 3PL receives the pick request, customer receives the tracking update, and Klaviyo fires the shipped flow. No human in the middle. Every link in the chain is automated and monitored.
From $3,200Live in 12 days
03 · Marketing Automation
Klaviyo flows trigger from real commerce events, not stale data.
We route ecommerce events through a server-side pipeline to Klaviyo. Every checkout, product view, abandoned cart, and purchase fires reliably, regardless of browser or ad blockers. Your segments are built from real purchase history, not last week's export.
From $3,600Live in 12 days
Placed Order → post-purchase flow
Started Checkout → abandon flow
Viewed Product → browse abandon
Segments: High-LTV 1,204 profiles
Source: server-side (not pixel)
$2.4M
Revenue MTD
Live from Shopify + ERP
14,241
Units on hand
Live from ERP
Updated: 43 seconds ago
04 · Analytics and Business Intelligence
Finance works from live ecommerce revenue, not Monday's export.
We build a unified data layer pulling from your storefront, ERP, and marketing tools into Power BI or your analytics platform. Revenue, margin, inventory, and customer lifetime value visible in real time. No more waiting for reports that are already outdated by the time they arrive.
From $4,800Live in 16 days
Client story
Half Price Drapes: Shopify, Dynamics 365, Klaviyo, and Power BI, all connected. $70M in annual revenue.
The problem
Systems status
Shopify, Dynamics 365 ERP, Klaviyo, and business intelligence tools operating as four separate silos. No shared data. Finance worked from weekly spreadsheet summaries. Orders reconciled manually.
Operational cost
Multi-channel inventory mismatches caused overselling. Customer data siloed in each platform prevented cohesive marketing. Real-time revenue insight was impossible.
Growth ceiling
Manual processes capped operational scale. Adding a new sales channel meant another manual feed. The business could not grow without growing the headcount to manage it.
The result
Outcome
$0M
Annual ecommerce revenue following the Shopify upgrade, Dynamics 365 ERP integration, Power BI analytics layer, and Klaviyo implementation.
Systems integrated
Shopify PlusDynamics 365 ERPPower BIKlaviyo
What changed
Integrated analytics improved operational efficiency and decision-making through real-time insights. Inventory management and customer experience improved across all sales channels. Automated ecommerce systems unlocked scalable growth without headcount growth.
Architecture
Your storefront as the commerce data origin
Every order event, inventory change, and customer action from your storefront triggers synchronized updates across every connected system through our integration layer.
Why Redefine
What separates a Redefine ecommerce integration from a typical build
Capability
Typical partner
Redefine
Platform-specific integration design (Shopify, BigCommerce, Headless)
Fixed-price with confirmed go-live date before build starts
Schema brief and data contract reviewed before build starts
Error handling, retry logic, and dead-letter queues designed upfront
Real-time sync (configurable cycle), not nightly batch jobs
30-day hypercare with direct Slack access to the build engineer
Common questions
Ecommerce integration consulting: what you need to know
We work primarily with Shopify Plus, BigCommerce, and custom headless storefronts. We also integrate Magento 2 and legacy platform builds via REST API, webhooks, or flat-file bridges. See our API integration services for endpoint-specific builds and our ERP integration services for the backend side of ecommerce integration.
A single storefront-to-ERP or storefront-to-3PL endpoint typically goes live in 12 to 18 days from signed brief. Full multi-system builds connecting your ecommerce store to ERP, customer relationship management, marketing automation, and business intelligence run 6 to 12 weeks depending on source system complexity and data volume.
Yes. Single ecommerce endpoints start from $3,200 fixed-price. Full stack builds connecting your storefront to ERP, customer relationship management, 3PL, and business intelligence start from $14,000. Architecture audits are $800 and credited toward any build. Time-and-materials retainers are available for ongoing maintenance.
Yes. Headless builds are our most complex ecommerce integration work. We design custom API endpoints, server-side event pipelines, and unified product catalog layers that sit between your frontend and all connected backend systems. Pricing starts from $6,400 for headless integration builds.
Every integration we build includes schema drift detection and automated alerting. If a Shopify or BigCommerce API change affects your integration, we alert before data starts failing silently. The 30-day hypercare period and optional managed retainers keep everything stable long-term. We also recommend periodic integration audits after major platform version upgrades.
Is this the right engagement
Is this the right ecommerce integration engagement?
Not sure? Tell us your situation and we will be straight with you. We turn away projects that do not fit.
Good fit
- You run Shopify Plus, BigCommerce, or a headless storefront and need it connected to ERP, customer relationship management, or 3PL.
- Your team manually exports, imports, or reconciles data between your storefront and other systems.
- You want a fixed scope, a fixed price, and a go-live date you can plan around.
- You need custom transformation logic, B2B pricing rules, or approval workflows as part of the integration.
- You are scaling into multiple sales channels and need unified inventory and order management.
Not the right fit
- Your storefront already has native app integrations that work reliably for your current volume.
- You are still evaluating which ecommerce platform to launch on and have not chosen yet.
- You need an agency to build and run your storefront itself, not just the integration layer behind it.
- You want open-ended staff augmentation with no defined deliverables or go-live commitment.
Not sure? Tell us your situation and we will be straight with you.
Get started
Book A Discovery Workshop
Tell us about your storefront and what needs to connect behind it. We respond within 48 hours with a call slot and a platform-specific integration brief.
Call within 48 hours → platform brief in 3 days → build starts within 1 week of sign-off
Response within 48 hours
Scoped proposal in 3 days
$70M client revenue scaled
Full code ownership on handoff
Your team's time across a full ecommerce integration build is typically 2 to 3 hours per week: one schema review, async feedback on data contracts, and a final quality assurance sign-off on the first live sync. We handle everything else.
Brief received
We will review your storefront and integration requirements and send a scoped platform brief within 3 business days.
Ready to connect
Ready to connect your storefront to everything behind it?
Go from first conversation to first live ecommerce endpoint in under three weeks. Start with the platform audit and see what is possible.
No commitment. No pitch.
Submit brief → call within 48 hours → platform brief in 3 days → Sprint 1 within 1 week of sign-off