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Fixed-price Shopify custom ERP and legacy systems

Shopify ERP Integration, Rules Written Down, Runs Logged

Shopify ERP integration ties your store to the system that runs your business: orders pushed to the ERP, stock and prices pulled back, customers matched and invoices linked. Guides advise the ERP as the owner of inventory, real-time sync for orders, batching for prices and catalogue, and middleware for queues and retries. NetSuite, Business Central, SAP and Odoo each have different connector options. We choose the pattern, build and test it, from $290.

  • Source of truth decided per data type: stock, price, customer, order
  • Real-time for orders, batched for prices and catalogue
  • Connector or middleware chosen for your ERP
  • Test log and a recorded handover
From$790
Delivery4 to 20 working days
Revisions2 rounds
custom ERP and legacy systems automation for Shopify shown as a connection map with orders, items and shipments, a run log and four build steps
Our track record

Launched 450+ Shopify Stores Since 2015. Now We Automate the Work Behind Them.

A store is only as efficient as the work behind it. Our automation work comes from years spent in Shopify, so we know what a clean order looks like.

450+

Shopify stores designed and launched

4.9+

Average rating from verified clients

2015

Building Shopify stores since

Secure checkout

Pay through a protected checkout and keep a full order record.

Two revision rounds

Included in every package, so the result matches what you pictured.

Backup before changes

We work on a duplicate of your theme, never on your live store.

Who this is for

Who Our Shopify ERP Integration Service Is For

ERP projects start with the system you have. Custom and legacy systems with no connector need a direct build through their own API, database or file exports, usually behind middleware. These are the cases we meet.

You are a good fit if
  • Your orders come through Shopify
  • You know roughly how the task runs today
  • You would rather pay once than by the hour
  • You can review a test run with us
  • Companies on NetSuite

    A native connector exists and is often paired with an iPaaS such as Celigo or Patchworks.

  • Companies on Business Central

    Microsoft's first-party connector covers orders, stock and customers, per one guide.

  • Companies on SAP Business One, Odoo or a custom legacy system

    SAP has no first-party connector and Odoo uses connector modules. A custom or legacy system is reached through its API, database or file export behind middleware. We choose the route.

  • Teams with overselling between syncs

    Order validation catches stock gaps between inventory pulls.

  • Teams with slow polling

    Polling every 15 minutes is a common cadence. Event-driven designs are faster.

  • Finance and operations leads

    Each field has one owner, written down.

Problems solved

Why Shopify ERP integration Projects Go Wrong, and How We Prevent It

ERP sync problems are usually ownership problems. These are the six faults we fix.

The problem

Two systems both edit stock

The outcome

We name an owner.

The problem

Orders posted twice

The outcome

We key on order number.

The problem

Stale inventory

The outcome

We use events and validation.

The problem

Prices out of step

The outcome

We batch and compare.

The problem

API limits hit

The outcome

We batch and retry.

The problem

No error owner

The outcome

We assign.

What we can do

Six Parts of a Reliable Custom ERP and Legacy Systems Workflow

How we build an ERP integration, in order.

Ownership map

Who owns which data.

Pattern and tool

Polling, events or batch; connector or middleware.

Validation

Order checks and de-duplication.

Retries

Queues and retries for limits.

Tests

Orders to invoices.

Handover

Notes and recording.

What is included

What Is Inside Your Custom ERP and Legacy Systems Automation

Six groups, four checks each. Compare them with any quote you have and see which ones it names.

Design

  • Platform picked, with a cost estimate
  • Triggers and conditions listed
  • Rules written in plain words and approved
  • A named owner for each step

Triggers

  • Event order verified
  • Trigger built for when an order is paid
  • Trigger built for when stock changes in the ERP
  • Event handled: a shipment is confirmed

Actions

  • Warehouse and price list mapped, blanks handled
  • Step built to return the shipment and tracking
  • The workflow will update availability in Shopify
  • Messages reviewed before they go live

Safety

  • Unique key on every step
  • Alerts when a run fails
  • Consent and opt-outs honoured
  • Daily check for silent stops

Testing

  • Scenario tested: a partial shipment
  • We watch the first live runs
  • Scenario tested: a normal order
  • Refunds and edits tested

Handover

  • A diagram of the flow
  • Two rounds of changes included
  • Post-launch questions answered
  • Recorded walkthrough of the workflow

You give access, approve the rules and sign off the test results. Everything else, from the first trigger to the final log, is ours.

The automation, mapped

How We Wire Up Custom ERP and Legacy Systems for Your Store

All automations follow the same path. An event arrives, the rules decide what applies, the action runs and the result is logged where your operations team can see it. This map shows the pieces we build and test before handover.

From event to action, loggedShopify store sits in the centre and connects to Orders (Checked), Items (Moving), Stock (Counting), Shipments (Matched), Queue (Linked), Log (Synced). Data pulses travel to each tool in turn and an activity log records: Orders matched, no duplicate; Items mapped field by field; Stock checked against Shopify; Failures retry, then alert. Stages: Define, Build, Test, Launch.From event to action, loggedShopify storeOrdersCheckedItemsMovingStockCountingShipmentsMatchedQueueLinkedLogSyncedRun logOrders matched, no duplicateItems mapped field by fieldStock checked againstShopifyFailures retry, then alert1Define2Build3Test4Launch
From event to action, loggedShopify store sits in the centre and connects to Orders (Checked), Items (Moving), Stock (Counting), Shipments (Matched), Queue (Linked), Log (Synced). Data pulses travel to each tool in turn and an activity log records: Orders matched, no duplicate; Items mapped field by field; Stock checked against Shopify; Failures retry, then alert. Stages: Define, Build, Test, Launch.From event toaction, loggedShopify storeOrdersCheckedItemsMovingStockCountingShipmentsMatchedQueueLinkedLogSyncedRun logOrders matched, no duplicateItems mapped field by fieldStock checked against ShopifyFailures retry, then alertDefineBuildTestLaunch
Portfolio

Our Store Work Behind Your Automation

A clean automation works best on a tidy store. Browse stores we have designed and launched, and picture each with custom ERP and legacy systems running behind it.

Pet creator visual for Shopify Starter Store Design (Link-in-Bio Setup)

Pet Life With Zoe Pet creator Shopify Visual

Pet creator
Books visual for Subscription Box Shopify Store Design

Night Owl Reads Books Shopify Visual

Books
Skincare visual for Custom Shopify Product Page Template

Kin Skin Skincare Shopify Visual

Skincare
Interiors visual for Editorial / Lookbook Shopify Page Design

Quiet Rooms Interiors Shopify Visual

Interiors
Stationery visual for Print-on-Demand Shopify Store Design (Printify / Printful)

Muse Paper Co Stationery Shopify Visual

Stationery
Responsive Shopify dropshipping store for outdoor and camping gear

Outdoor Gear Dropshipping Store

Outdoor camping gear
Process and timeline

From First Call to Live Workflow: Our Shopify ERP Integration Process

A fixed order of work keeps the project predictable. You know what happens next at every point.

  1. 1

    Brief and rules

    We ask how custom ERP and legacy systems works today, who does what and where it goes wrong. Together we write each rule in plain words: when an order is paid, then send the order in the format the system expects.

  2. 2

    Access and platform

    Access is narrow and approved by you. We suggest a platform, state what it costs each month and prove the connection with a live read.

  3. 3

    Map the data

    The data map covers item code, customer account, warehouse and price list; formats are checked on both sides and blank values are given a rule.

  4. 4

    Build in a copy

    The workflow is built against test data, never your live orders. You see the plan and, where useful, a recorded run.

  5. 5

    Test on real cases

    The tests cover a normal order, a backorder and a partial shipment, along with refunds and edits, and each result is checked against Shopify.

  6. 6

    Go live and hand over

    When you say go, the workflow goes live. We watch the first runs and leave you notes, a diagram and a recorded walkthrough.

Compare your options

Do It by Hand, Use an App, Build It Yourself or Hire Us for Shopify ERP Integration?

There are four common ways to handle custom ERP and legacy systems. This table compares the checks that decide whether the work stays right, whether failures are noticed and whether you can hand it on.

What mattersBy handBuilt-in appNo-code platformStore Design Expert
Every rule agreed in writingNoNot oftenIf you write themYes
Awkward cases checkedBy luckSeldomIf you test itYes
Retries cannot repeat actionsProne to slipsVariesIf you add itYes
Failures alert a named personNoOccasionallyOnly if you add itYes
Fixed price up frontYour team's timeJust plan feesPlan fees and your timeYes
Notes and a recorded walkthroughNoNoNoYes
Accounts owned by youYesYesYesYes
Support after launchNoVendor supportHelp desk of the platformIncluded for a period
Inside every project

Six Safeguards Built Into Every Automation

None of these costs extra. They are simply how we work.

Failures raise a flag

A named person receives an alert, with the order and the reason, whenever a run fails.

Counts compared, not assumed

Once past orders are processed, we count both sides, so missing or doubled records show up early.

Nothing sent without approval

No message to a customer goes live until you have read and approved it.

Plain scope, two revision rounds

Price first, then two structured revision rounds for anything in scope, so no tweak becomes a surprise charge.

Narrow access, in your name

We ask for the least access that works, and every account stays under your ownership.

Secrets kept in a vault

A secure vault holds every key and token; none appear in notes or chat.

Interactive price calculator

Price Your Shopify ERP Integration

Pick a package, answer three short questions and add any extras. Your total and delivery window update as you click, with nothing hidden until checkout.


Choose your packageRequired

Each package reaches further into the workflow. Every option below shows its own price and any extra days, so nothing is sprung on you after checkout.

One automation built and tested: send the order in the format the system expects when an order is paid, with an alert if it fails.

  • One trigger built: when an order is paid
  • An action to send the order in the format the system expects
  • Retries can never repeat an action
  • Failed runs raise an alert
  • Proven on a normal order and a backorder
  • Written test log and video handover

Core automations live: send the order in the format the system expects, update availability in Shopify and return the shipment and tracking, with filters, retries and failure alerts.

  • Everything in Single Build
  • Triggers for when an order is paid, when stock changes in the ERP and when a shipment is confirmed
  • Actions to send the order in the format the system expects; update availability in Shopify; and return the shipment and tracking
  • Tag, country and value filters
  • Failed steps retried and checked daily
  • Proven on a normal order, a backorder and a partial shipment

The full set with edge cases, a catch-up run, a fortnight of monitoring and a written runbook.

  • Everything in Core Build
  • Awkward cases built in
  • Past orders caught up in one pass
  • Monitoring for 14 days
  • Roles and permissions reviewed
  • Runbook with the rules and the fixes

Workflows that span many systems, need custom code, handle very high volumes or depend on an on-premise system are quoted separately at a fixed price.

Which tool should host the workflow?Required

The platform decides your monthly cost and your limits.

How busy is the store?Required

Busier stores need queuing and extra tests.

How many other tools are involved?Required

Every extra tool means more access, mapping and testing.

How soon do you need it live?Required

Standard follows the schedule your other choices set. Pay to move up the queue and go live sooner.

Optional extrasOptional

Each one begins switched off. Turn on what you need, watch the total, switch it back off.

Request a custom quote

Workflows that span many systems, need custom code, handle very high volumes or depend on an on-premise system are quoted separately at a fixed price.

Request a Quote

Changed your mind? Choose Single Build, Core Build or Full Build above to return to the instant calculator.

Packages and comparison

Shopify ERP Integration Package Comparison

Here is each package line by line. When you compare our fee with a marketplace listing for Shopify ERP integration, count how many of these checks the cheaper offer actually names.

What is includedSingle Build
$790
Core Build
$1,590Recommended
Full Build
$2,990
One trigger built: when an order is paidIncludedIncludedIncluded
An action to send the order in the format the system expectsIncludedIncludedIncluded
Retries can never repeat an actionIncludedIncludedIncluded
Failed runs raise an alertIncludedIncludedIncluded
Written test log and video handoverIncludedIncludedIncluded
Triggers for when an order is paid, when stock changes in the ERP and when a shipment is confirmedNot includedIncludedIncluded
Actions to send the order in the format the system expects; update availability in Shopify; and return the shipment and trackingNot includedIncludedIncluded
Tag, country and value filtersNot includedIncludedIncluded
Failed steps retried and checked dailyNot includedIncludedIncluded
Awkward cases built inNot includedNot includedIncluded
Past orders caught up in one passNot includedNot includedIncluded
Monitoring for 14 daysNot includedNot includedIncluded
Runbook with the rules and the fixesNot includedNot includedIncluded
Typical delivery4 to 7 days7 to 12 days11 to 20 days

The calculator above is the source of truth for your final price and delivery estimate.

Why Store Design Expert

Why Owners Choose Our Shopify ERP Integration Over Doing It Alone

Templates cover the happy path. We cover the rest, and we put the result in writing.

Notes a colleague can follow

Our handover records what happens when, and which settings were chosen, so a future developer will not have to guess.

We live inside Shopify

We work with Shopify orders, refunds, edits and metafields daily. That depth is separate from knowing an automation tool's interface.

Tested on your real cases

We test the cases your store actually has, such as a normal order, a backorder and a partial shipment.

Experience since 2015

Over 450 Shopify stores since 2015 mean we have seen most of the odd cases that break automations.

Safety designed in

Retries, alerts, unique keys and limited access come as standard in every build.

A direct line to the builder

Ask the person who built it. Questions about rules or fields get a direct reply.

What we need to get started

What to Prepare Before We Start Your Custom ERP and Legacy Systems Automation

The list is short. Most owners have everything ready in a day.

Approve a collaborator request

Already selling? Send the store address and accept the request we raise. You stay the owner, we see only what the role permits, and you can remove us at any time.

Starting from nothing? We build first

No store yet? We build it in our Partner account, set up the workflow there and transfer the whole store to you, so you choose a plan only at the end.

Or share a staff login

Sharing a staff login is possible. The collaborator route is safer, though: one click removes it and no password is passed around.

Access to the other tools

Add us to the tools the workflow uses, or have us create accounts under your email. You stay the owner in both cases.

Examples of the work today

Send two or three recent cases, or tell us where to find them. Real examples show how the process actually runs.

A decision-maker

Who signs off the rules and the test? And when two rules disagree, which wins? Those two answers are all we need.

Your Shopify owner password and card details never reach us. Changes are made in a copy, and we note every setting we touch.

Testimonials

What Store Owners Say After Working With Us

Read how past projects went before you pick a package.

Verified

Store Design Expert delivered an outstanding website development experience! Their professionalism and attention to detail exceeded my expectations, and their proactive communication kept everything running smoothly. Truly impressed by their deep understanding and dedication.

WG
Warren G.United States
Verified

Superb work! Store Design Expert is incredibly patient, and even when I did not fully understand my own questions, everything was explained again in detail. My vision was implemented perfectly, and the work is worth every cent I spent.

KB
Katrin B.Germany
Verified

Very impressed with the build-out. My store is ready to get started, and I am sure I will reach out for edits down the road, but this is everything I could ask for to get the party started. Thanks again, and I will be in touch for future projects.

DH
Dale H.United States
Verified

Very quick and detailed work! Store Design Expert does exactly what you want, in a very professional manner.

LF
Lena F.Germany
Verified

Store Design Expert did an outstanding job with top-notch professionalism on my website project. Everything was delivered quickly without compromising quality. I could not have asked for better!

JM
Jason M.United States
Verified

The website development work was nothing short of professional, with top-notch quality. Their exceptional level of cooperation made the collaboration seamless and enjoyable. Highly recommend working with Store Design Expert!

JC
Jeremy C.United States
Verified

Super great to work with, and super fair!

RO
Robert O.United States
Verified

The website development work was truly impressive. Their attention to detail and ability to exceed expectations made the project a success. Working with them was a breeze, thanks to quick responsiveness and a willingness to go above and beyond.

KD
Kevin D.United States
Verified

Store Design Expert was very knowledgeable about what I needed done to fix my Shopify store and how to improve the store layout. The project was completed very quickly, and I will definitely use them for support as my business grows.

ST
Samuel T.United States
FAQ

Shopify ERP Integration FAQs

Answers on cost, timing, platforms, safety and what to do when a workflow misbehaves.

How much does Shopify ERP integration cost?

Single Build costs $790, Core Build $1590 and Full Build $2990. Platform, volume, the number of connected tools and add-ons change the total, and the calculator shows it before you pay. Most projects land between about $790 and $4190, with delivery from 4 to 20 working days. Queries such as "shopify erp zapier" lead to the same build.

How long does custom ERP and legacy systems automation take?

Single Build takes 4 to 7 working days, Core Build 7 to 12 and Full Build 11 to 20. The usual variables are how many tools are involved and how quickly you approve the rules and the test. The Sooner and Fastest options shorten the schedule when a date is fixed. People also search for "shopify erp workflow"; this page covers that too.

Should the ERP or Shopify own inventory?

Guides recommend the ERP as the owner, pushing updates to Shopify. The same service covers "how to automate erp on shopify".

How often should inventory sync?

A common cadence is about every 15 minutes, with event-driven designs for faster updates. The same service covers "shopify erp integration guide". If you came here from "shopify erp make.com", this is the page for it.

Which ERPs have connectors?

NetSuite has a native connector, Business Central has a first-party one, SAP Business One relies on third parties, and Odoo uses connector apps. This also answers "shopify erp integration services". The same service covers "shopify erp n8n".

What is middleware for?

Queues, retries and monitoring at scale. If you came here from "shopify sap erp integration", the answer is the same. You may also see it searched as "shopify erp expert"; the work is the same.

What breaks most often?

Treating inventory as one number, and underestimating API limits in peaks. This also answers "shopify plus erp integration". Queries such as "hire shopify erp developer" describe the same work.

Can you work with our ERP?

Yes, after a short review. Another way to phrase it: "logic erp shopify integration"; the same build answers that too. Another way to phrase it: "shopify erp app"; this page covers that too.

Can you add order validation?

Yes. The same service covers "shopify erp integration zapier".

Ready when you are

Book Your Shopify ERP Integration Build

If the steps above sound right, choose a package and adjust the calculator. Work begins once you check out. This page covers Shopify ERP integration.

  • Secure checkout
  • Two revision rounds
  • Test log and walkthrough included