Apps & integrations
Backend & API integrations (ERP, suppliers, 3PL)
Your store, suppliers, warehouse and other systems kept in step automatically, so nobody copies stock or orders by hand.
What's included
- Supplier catalogue and stock sync
- ERP and 3PL connections for orders and fulfilment
- Order automation and webhooks
- Services in Node.js and TypeScript, with logs
- Dry runs and backups before anything is written
- Hosting on Railway or Fly.io
Sounds familiar?
- Stock updates once a day, so you sell items you do not have.
- Someone on your team retypes orders into another system.
- Your supplier sends a spreadsheet, and the catalogue is always behind.
- An integration broke, and nobody knows how it works.
If one of these is yours, send me a link and a few lines. Describe your task
How a project runs
Step 1: Send the task
A link and a few lines is enough.
Step 2: Fixed estimate
Hours, scope and deadline before any work starts.
Step 3: Build & review
On a staging copy first. Nothing goes live without your OK.
Step 4: Pay on delivery
Exactly the estimate. Nothing added later.
Projects up to 20 hours usually need no prepayment. Bigger ones are agreed individually.
30-day warranty. Critical bugs from my work get fixed free, even after that.
Related work
Projects where I did this work, each with the problem, the decisions behind the build and the result.
Supplier catalogue and stock sync
A service keeps several stores' catalogue and stock in step with a supplier, every 30 minutes.
Supplier integration · Catalogue sync between platforms
Green Planet Print: fabric stock locations
About 39,000 fabric variants moved to the right warehouse, with Flow to keep them there.
Bulk catalogue operations · Inventory locations and shipping profiles
Kidoriman: customs IDs at checkout
A checkout app that collects each country's customs IDs and blocks invalid data.
Checkout customisation · Checkout UI extensions
Shopify to BigCommerce migration, multi-store
Several Shopify stores moved to BigCommerce with every URL, metaobject and review kept.
Shopify to BigCommerce migration · BigCommerce theme development


Zoocchini: one store for retail and wholesale
Moving a separate wholesale store into the retail store with native Shopify B2B.
Shopify B2B and wholesale setup · Store consolidation
Questions
How often can stock update?
As often as the systems allow. For a US vape store chain, stock in the connected stores now updates every 30 minutes instead of once a day.
What if something goes wrong?
Every write is tried as a dry run first, with a backup to roll back to, and the service logs what it changed.
Have a task like this?
Send a link and a few lines about what you need. I reply within 1 business day with questions or a fixed estimate.
Get a fixed estimate- The estimate is the priceHours and total agreed before work starts. No re-estimates.
- No prepayment on small projectsProjects up to 20 hours usually need none.
- 30-day warrantyCritical bugs from my work get fixed free, even after that.