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Yes
Legacy / On-Prem Supported
01The Problem
By the time a stock change in the warehouse reaches your storefront, it may already be too late to stop an oversold order.
The problem
Your warehouse team picks and packs in the WMS, but Shopify doesn't find out until later, so customers sometimes order stock that's already spoken for, and reconciling the two systems has become a recurring, manual chore.
How we solve it
We connect your WMS directly to Shopify and your ERP if you run one, syncing stock, order releases, and shipment confirmations in real time, including legacy or on-prem systems without a modern API, with stock buffers built in to help prevent overselling.
Works with legacy systems
Older, on-prem WMS platforms integrated through EDI, SFTP, or file transfer when there's no API.
Built to prevent overselling
Stock buffers and sync frequency tuned to real warehouse activity.
Clear on system boundaries
We help you understand what belongs in your WMS, ERP, or OMS before building anything.
02Our Integration Process
You see the exact data flow between your warehouse, ERP, and Shopify before development starts, not just a finished integration at the end.
03What's Included
Every project covers technical review, data flow design, development, testing, and a handover your team can build on.
WMS technical review
Your WMS's API, EDI, or file format capabilities reviewed before development starts.
Real-time stock sync
Warehouse stock levels kept in sync with Shopify as they change.
Order release & shipment sync
Orders sent to your WMS automatically, shipment confirmations synced back to Shopify.
Legacy & on-prem support
File-based and EDI integration built for WMS platforms without a modern API.
Overselling-prevention buffers
Stock buffers built in so a brief sync delay doesn't result in an oversold item.
Retry logic & error alerts
Sync issues caught and queued rather than silently dropping data.
04Compare Options
A native app covers common cases, and a generalist can wire up an API call. Here is where each one runs out and where a custom integration pays off.
| Feature | DeveloperLookBEST FIT | WMS's Native App | Generalist Developer |
|---|---|---|---|
| Works with legacy or on-prem WMS | EDI, SFTP, and file integrations built to spec | Not supported | Rarely offered |
| Overselling-prevention logic | Stock buffers tuned to real warehouse activity | Basic or none | Rarely addressed |
| ERP-in-the-middle support | WMS, ERP, and Shopify integrated together | Usually two-system only | Case by case |
| Failure handling | Retry logic and alerts built in | Varies by app | Often skipped |
| System-boundary clarity | Clear on what belongs in WMS vs ERP vs OMS | Assumes you already know | Varies by developer |
| Launch support | 30 days included | Vendor's general support | Often none |
| Cost | One fixed project | App subscription plus setup | Hourly, if available |
05Projects We've Built
A selection of Shopify and ecommerce builds shipped for clients, several involving backend warehouse and inventory integrations like this one.
06What Our Clients Say
Feedback from ecommerce teams we have built warehouse and inventory integrations for.
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Our experience with the Developerlook team was outstanding. They exhibited high professionalism throughout the project. Their communication was excellent, making the collaboration smooth and effortless. The team adeptly navigated us through numerous business and technological challenges, proving instrumental in the commencement of our business. We will undoubtedly engage the expertise of the Developerlook team for our future projects.
Zach
Founder of Adventure Fit Dojo
We've had the pleasure of collaborating with the Developerlook team. They've showcased a solution-oriented approach, impressive skills, and provided numerous tips and solutions that significantly enhanced our website beyond our expectations! We highly recommend Developerlook.
Vegard
Co-Founder of Nutihorse
Our Autocar automotive app had a very different challenge. We needed customers to be able to browse vehicles, check details, and move through the enquiry process without getting lost in a complicated interface. Our first concern was performance because we knew a slow app would hurt the experience immediately. DeveloperLook helped simplify the screens, improve the user flow, and make the app feel much more responsive across different devices. I remember testing it on an older phone and thinking, ‘Okay, this actually feels like a proper product now.’ That was probably the moment I knew we had made the right decision. Even after launch, they continued helping us with fixes and improvements instead of treating delivery as the end of the relationship
Daniel Brooks
Operations Director
150+
Projects shipped
10+
Years in development
Top 3%
Upwork Top Rated Plus
5★
Average review score
07Work Culture
A WMS integration that lags behind real warehouse activity causes overselling, not just inconvenience. These are the habits we bring to every project.
Stock buffers and sync frequency tuned to real warehouse activity, not a default setting.
Older, on-prem WMS platforms integrated through EDI, SFTP, or file transfer when there's no API.
We help you understand what belongs in your WMS, ERP, or OMS before building anything.
Retry logic and error alerts mean a sync issue gets caught, not silently dropped.
You know exactly what data syncs and in which direction before development starts.
WMS, ERP, and Shopify integrated together when your setup needs all three.
08Overview
DeveloperLook connects your Warehouse Management System to Shopify and your ERP, syncing real-time stock, order releases, and shipment confirmations, including legacy or on-prem WMS platforms without a modern API. Projects start from $2,499, most complete in 3 to 9 weeks, and we build in stock buffers to help prevent overselling.
Who it's for
Businesses running their own warehouse and WMS
You manage your own warehouse operations in a WMS and need it talking to Shopify directly.
Stores with overselling problems
You're selling stock that's already been picked or isn't actually available, because Shopify's inventory count lags behind what's happening in the warehouse.
Businesses on a legacy or on-prem WMS
Your WMS is an older, on-premises system without a modern cloud API, and needs a custom connection rather than a plug-and-play app.
Multi-channel sellers needing accurate stock everywhere
You sell on Shopify and other channels, and need your WMS to be the single accurate source of stock across all of them.
Businesses connecting WMS, ERP, and Shopify together
You need your warehouse, ERP, and storefront all talking to each other, not just two of the three.
Not a fit for
You're using an outsourced 3PL and don't run your own warehouse or WMS. Our Shopify 3PL Integration service covers that outsourced-fulfillment scenario.
You need your ERP synced with Shopify for financials, purchasing, or broader inventory, not warehouse-floor operations specifically. Our Shopify ERP Integration or Shopify NetSuite Integration services cover that.
You want an order management system integration to route and split orders across channels, not a warehouse system sync. A dedicated OMS integration would need to be scoped separately.
You're not on Shopify, or you don't have a WMS at all yet. Platform and system-specific setup would need to be scoped separately.
09Pricing
These are starting points in USD. Your final price depends on your WMS's technical requirements and whether an ERP is also involved, and you get a fixed proposal after reviewing your setup.
10For Agencies
You own the client relationship. We supply the integration work. Send us the WMS's technical documentation and we build, test, and hand over under your brand, on your deadline.
Stay client-facing
We work under your brand, so you keep the relationship and the credit.
Predictable delivery
Clear scope and a delivery date, with QA before anything reaches your client.
Warehouse specialists
WMS, ERP, and Shopify integrations handled without hand-holding.
Flexible capacity
Bring us in for one integration or an ongoing string of fulfillment projects.
01
Share the brief
Send the WMS's technical documentation, warehouse count, and the client deadline.
02
We propose and staff
You get an estimate and a delivery date before you commit.
03
Build and deliver
We build, test, and deliver documentation under your brand.
11The Right Technology for Your Project
We integrate through your WMS's own API or file-based methods, matched to what your system actually supports.
Infor WMS
Manhattan Associates
Fishbowl
Legacy / On-Prem WMS
Pick a 30-minute slot that works for you. We meet on Google Meet to align on goals, scope, and the right next step.
12FAQ
Straight answers on WMS integration, overselling prevention, and legacy systems.
The WMS typically handles physical warehouse operations, picking, packing, and bin-level stock, while the ERP handles financials, purchasing, and broader inventory planning. Integration usually means the WMS sends real-time stock movements and shipment confirmations to the ERP, and the ERP sends order and purchasing data back to the WMS, so both systems stay aligned without manual re-entry.
We connect through the WMS's API if it has one, syncing stock levels and order fulfillment status directly with Shopify. For WMS platforms without a modern API, we build the connection through file transfers, EDI, or whatever method the WMS actually supports.
At minimum, real-time available stock and shipment or tracking confirmations. Many setups also sync order releases, so the WMS knows what to pick and pack as soon as an order comes in, and returns or stock adjustments, so Shopify's count stays accurate after a restock or write-off.
Projects typically start from $2,499 for a single-warehouse integration with a modern WMS API, and scale up for legacy or on-prem systems, multiple warehouses, or ERP-in-the-middle setups. You get a fixed quote after reviewing your WMS's technical documentation.
A standard integration with a WMS that has a documented API typically takes 3 to 5 weeks. Legacy or on-prem systems, or setups involving both a WMS and an ERP, can take 6 to 9 weeks.
Yes. Legacy and on-prem WMS platforms often exchange data through flat files, EDI, or a local database connection rather than a cloud API, and we build the file generation, transfer, and parsing logic needed to keep them in sync with Shopify.
We build in a stock sync frequency tight enough to reflect real warehouse activity, and typically recommend a small safety buffer on fast-moving items so a brief sync delay doesn't result in selling stock that was just picked for another order.
A WMS manages what happens physically inside your warehouse, picking, packing, and bin locations. An OMS manages how orders get routed and processed across channels and warehouses. An ERP manages the broader business, financials, purchasing, and planning. A given integration project might touch one, two, or all three, depending on which systems you actually run.
