Loading, please wait...
Yes
Works Without a Public API
01The Problem
Manual exports and spreadsheet reconciliation work, until they don't, and by the time you notice a mismatch, an order has usually already shipped wrong or not at all.
The problem
Your 3PL's inventory count doesn't match what Shopify shows, tracking numbers show up late or not at all, and every time an order actually gets lost in the gap between the two systems, it's your team fielding the angry email.
How we solve it
We build the integration between Shopify and your 3PL directly, whether that's a modern API, a webhook-driven sync, or EDI and file transfers for a 3PL that doesn't have an API at all, with retry logic and reconciliation checks so mismatches get caught instead of discovered by a customer.
Works with any 3PL
API-based, EDI, SFTP, or CSV, we integrate with what your 3PL actually supports.
Built to catch mismatches
Reconciliation checks built in, so inventory gaps get caught before a customer notices.
Resilient by design
Retry logic and failure alerts mean a temporary outage doesn't mean lost orders.
02Our Integration Process
You see the exact sync architecture before development starts, not just a finished integration at the end.
03What's Included
Every project covers technical review, sync architecture, development, testing, and a handover your team can build on.
3PL technical review
Your 3PL's API, EDI, or file format requirements reviewed before development starts.
Real-time inventory sync
Stock levels kept in sync between Shopify and your 3PL's warehouse.
Order & tracking sync
New orders sent to your 3PL automatically, tracking numbers synced back to Shopify.
EDI, SFTP & CSV support
File-based data exchange built for 3PLs without a modern API.
Multi-warehouse routing
Orders routed to the right warehouse based on stock, location, or product type.
Retry logic & failure alerts
Temporary outages queue orders instead of losing them, with alerts if a sync fails repeatedly.
04Compare Options
A native app covers common cases, and a generalist can install one. Here is where each one runs out and where a custom integration pays off.
| Feature | DeveloperLookBEST FIT | 3PL's Native App | Generalist Developer |
|---|---|---|---|
| Works with 3PLs lacking a public API | EDI, SFTP, and CSV integrations built to spec | Not supported | Rarely offered |
| Multi-warehouse routing logic | Custom rules for stock, location, or product type | Basic or none | Case by case |
| Failure handling | Retry logic and alerts built in | Varies by app | Often skipped |
| Existing integration troubleshooting | Root-cause audit and targeted fix | Vendor support ticket | Depends on developer |
| Reconciliation checks | Built to catch inventory mismatches directly | Rarely included | Often skipped |
| 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 integrations like this one.
06What Our Clients Say
Feedback from ecommerce teams we have built order and fulfillment integrations for.
keep scrolling
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
We had a different kind of problem. People were visiting the store, adding products to their carts, and then disappearing before they finished the order. We had tried a few apps and made changes here and there, but nothing really seemed to solve the bigger issue. The team went through the shopping experience with us and pointed out things we hadn't really noticed ourselves. They cleaned up the cart and checkout flow, made the mobile experience much smoother, and helped us make the store feel easier to shop. I’m not going to pretend we fixed everything overnight, but it finally feels like the store is helping the sale instead of getting in the way of it.
Ethan Parker
Founder of Elite Academy
150+
Projects shipped
10+
Years in development
Top 3%
Upwork Top Rated Plus
5★
Average review score
07Work Culture
An integration that silently drops orders is worse than no integration at all. These are the habits we bring to every fulfillment build.
Reconciliation checks built in from the start, not added after inventory goes wrong.
Retry logic and failure alerts mean a temporary outage doesn't mean lost orders.
API, EDI, SFTP, or CSV, we build to your 3PL's real technical requirements.
Broken integrations get audited for the actual point of failure before we touch any code.
You know exactly what the integration covers before development starts.
Routing logic built to handle multiple warehouses or 3PLs as you grow.
08Overview
DeveloperLook builds custom integrations between Shopify and your 3PL, syncing inventory, orders, and tracking numbers automatically, whether your 3PL has a modern API or exchanges data through EDI, SFTP, or CSV files. Projects start from $1,999, most complete in 2 to 5 weeks, and we build in retry logic and reconciliation checks so mismatches get caught early.
Who it's for
Stores fulfilling through a 3PL without a native Shopify app
Your 3PL doesn't have a plug-and-play Shopify app, or the one it has doesn't cover what you need.
Stores with inventory count mismatches
Your Shopify inventory doesn't match what's actually in your 3PL's warehouse, and you're not sure where the sync is breaking.
Stores using a 3PL that only supports EDI, SFTP, or CSV
Your 3PL is an established enterprise operation without a modern REST API, and files or EDI documents are how they exchange data.
Stores fulfilling from multiple 3PL warehouses
You need orders routed to the right warehouse automatically, based on stock, location, or product type.
Stores with a broken existing integration
You already have a 3PL integration, but it drops orders, misses tracking updates, or needs constant manual fixing.
Not a fit for
You just need a 3PL that already has a well-supported Shopify app installed and configured. That's usually a quick setup, not a custom integration project.
You want general inventory management across sales channels, not specifically a 3PL connection. A broader multi-channel inventory service would cover that.
You want a full ERP integration covering accounting, purchasing, and fulfillment together, not just 3PL order sync. A dedicated ERP integration service covers that wider scope.
You're not on Shopify. This integration is Shopify-specific, and other platforms would need to be scoped separately.
09Pricing
These are starting points in USD. Your final price depends on your 3PL's technical requirements and how many warehouses are involved, and you get a fixed proposal after reviewing your 3PL's documentation.
10For Agencies
You own the client relationship. We supply the integration work. Send us the 3PL'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.
Fulfillment specialists
API, EDI, and file-based 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 3PL'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 Shopify's own APIs and whatever data exchange method your 3PL actually supports.
Admin API
Webhooks
Fulfillment API
Inventory API
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 Shopify 3PL integration, inventory sync, and fulfillment.
When a customer places an order, the integration sends the order details to your 3PL automatically, either through an API call, a webhook-triggered sync, or a file transfer for 3PLs without an API. Once the 3PL ships it, the tracking number and status sync back to Shopify so the order updates and the customer gets notified.
A straightforward API-based integration with one 3PL typically takes 2 to 3 weeks. Integrations involving EDI, SFTP, multiple warehouses, or a 3PL without documented APIs can take 4 to 5 weeks or longer.
Projects typically start from $1,999 for a single-warehouse, API-based integration, and scale up based on complexity, multiple warehouses, EDI or file-based data exchange, and order volume. You get a fixed quote after reviewing your 3PL's technical documentation.
Mismatches usually come from sync delays between systems, inventory sold through other channels not being reflected in real time, manual warehouse adjustments that never get pushed back to Shopify, or a webhook that silently failed. We build in reconciliation checks specifically to catch this.
Yes. We build routing logic that sends each order to the correct warehouse based on rules like stock availability, customer location, or product type, so a single Shopify store can fulfill from several 3PLs or warehouses without manual sorting.
New orders are pushed to the 3PL through their API, EDI, or file feed as soon as they come in, usually via a Shopify webhook. Once the 3PL ships the order, we pull or receive the tracking number and update Shopify's fulfillment record, which triggers the shipping notification to your customer.
Yes. Many established 3PLs exchange data through EDI documents or scheduled SFTP file transfers rather than a modern REST API. We build the file generation, transfer, and parsing logic needed to keep those systems in sync with Shopify just as reliably as an API-based integration.
We build integrations with retry logic and failure alerts, so a temporary outage queues orders instead of losing them, and you're notified if a sync fails repeatedly so it can be checked manually before it becomes a backlog.
Yes. We start by auditing the current integration to find where orders are failing, usually a webhook not firing, a mismatched data format, or a missing retry mechanism, then fix the specific point of failure rather than rebuilding the whole integration from scratch.
