Custom checkout, payment and shipping integrations
When an off-the-shelf app isn't enough, we build our own. From cash on delivery and QR payments to VIES tax fields and ERP connections.
Solutions running in production
Every example is a real client checkout. Not a concept, not a mockup.
Cash on delivery with a fee in six stores
Buying as a company, right in checkout
Company ID and VAT number fields, checked against the EU VIES register. This is how they run in the Elmich checkout.
Company ID and VAT number in the Elmich checkout
A Mailship integration that fixes itself
Fabini, Life is Porno and Fitmar ship through Mailstep's Mailship. When the warehouse rejects an order, the integration fixes it and sends it again.
fitmar.cz
3+1 ZDARMA | Minutové snídaňové kaše
Cash on delivery for Mailship
CZK 650.85CZK 651
Hellers rounded up to whole crowns
fitmar.sk3+1 ZADARMO | Minútové raňajkové kaše
Cash on delivery for Mailship
CZK 699€27.75
Crowns converted to euros at the CNB rate
fitmar.hu3+1 INGYEN | Instant reggeli kásák
Cash on delivery for Mailship
HUF 9,492HUF 9,495
Rounded up to 5 Ft
Sent again, no manual fix
Orders used to wait until someone fixed them
COD with hellers, or in crowns to Slovakia, and Mailship rejected the shipment. The order waited for a manual fix.
Now the integration rounds it up or converts it to euros and sends it again.
Checkout & Cart Custom Integrations
Checkout and cart extensions we built for specific stores.
Tax fields with VIES validation
ToC checkboxes & notification blocks
High-converting upsell
ERP connections
B2B price lists and company accounts
Lowest price in the 30 days before a sale
We connect Shopify to your system
Production, accounting, stock and suppliers. An API, an FTP server or a spreadsheet is enough.
Production
Every saddle in an order becomes a row in the production sheet. The saddle configuration comes back to the order from the internal system.
Accounting
When a customer pays with loyalty credit, the invoice in SuperFaktura is adjusted and marked paid on its own. Elsewhere, invoices from Pohoda go straight out by email.
Fulfillment
Mailship rejected COD amounts with cents and Slovak COD in the wrong currency. The integration now rounds them, converts at the Czech National Bank rate and resends the shipment by itself.
A supplier with no API
Orders go to the supplier as XML over FTP, and stock is read every 30 minutes. Nothing is retyped by hand.
Stock and prices
Availability and lead times come from the supplier's API. Prices for two stores can be changed in bulk from a Google Sheet.
Warehouse scanner
Packers scan EAN codes and the app checks they pack the right items. It splits bundles into single items and stops cancelled orders from leaving.
Returns
A return in Retino becomes a credit note on its own.
Memberships and activation codes
After purchase, the client's system generates an activation code. The customer gets an email in their language and the order fulfils itself.
Ads and comparison sites
Google Ads gets each order's profit instead of its revenue, and cancellations are subtracted later. Feeds for 7+ channels come from our Feedflock.
Ready-made as an app, custom as a project
Often one of our apps is enough. If not, we build a solution just for you on the same foundation.
Got a problem no app solves?
Tell us about it. We'll say whether it takes a setting, an app or custom development.
- 01Tell us about your storeWhat you sell, what it runs on and what slows you down.
- 02We talk it throughOn a call with the people who will build it.
- 03You get an estimateA concrete proposal and what it will cost.