A catalogue, from design to delivery
I designed the mobile layout first, then built the catalogue interface with React and Next.js.
Connecting systems
Webshop integration: orders, invoices, stock and shipping in one flow
If you copy each order into your invoicing tool by hand, keep stock in a separate spreadsheet and fill in shipping labels yourself, you are typing the same data three times. I connect these systems so an order is created once, and the invoice, the stock update and the shipment all start from it.
The situation
Where does manual re-keying go wrong?
While orders are few, someone can copy them across in the evening. As volume grows, this is where most mistakes come from: a mistyped address, a missed invoice, a product that has sold out but is still on sale in the shop.
Webshop platforms and invoicing tools have programming interfaces (APIs), but off-the-shelf plugins rarely follow your exact process. They get stuck wherever you work differently: split shipments, cash on delivery, several warehouses, discounts given by hand.
What I build
What do I connect?
- Webshop: Shopify, WooCommerce, Shoprenter or UNAS; pulling in orders and product data
- Invoicing: Xero, QuickBooks, or Számlázz.hu and Billingo in Hungary; a paid or fulfilled order becomes an invoice, emailed to the customer
- Stock: sold quantities are deducted after every order, and the shop shows real stock levels
- Courier: parcel details go to the courier's system (for example Royal Mail, DPD, GLS or Packeta), and the tracking number comes back to the order
- Error handling: if a step fails you get an alert, and the order can be resent rather than lost
- Log: you can look up which order went where, when, and with what data
How do we start?
The first step is a free 30-minute call. After that, depending on the job, there are three ways to continue, and you see the price of each one up front.
Illustrative introductory prices · until 31 December 2026
30-minute call
free
You tell me where things stand, and we agree which starting point fits.
Technical audit
€880
A risk list and a written recommendation on what to do next.
Discovery and plan
€2,150
A defined scope, a phased plan and an itemised proposal.
First development phase
from €5,200
A usable first version covering the essential workflow.
Amounts are illustrative, with no VAT added. After the call or discovery I give you the exact price in writing.
Full pricing and how estimates workSample estimate
A similar sample job, priced with the same rules as the Workshop. You can get an estimate for your own project there.
Connecting your online shop to Xero or QuickBooks
4–8 weeks€6,200–14,500
Orders from your shop should create the invoices and the sales and payout entries in your accounting software automatically, with a retry when something fails, and an export your accountant can use for the VAT return. The exact scope depends on the accounting software's API, so it is settled on the first call. Your accountant confirms what applies to your filings.
Related work
Questions
Wouldn't an off-the-shelf plugin do?
If there is a plugin that does exactly what you need, I will recommend it, because it costs less. A custom integration pays off when the plugin cannot handle your case, or when several systems need to work together. We look at this on the first call.
What about tax reporting?
The invoicing tool issues the invoice and handles reporting to the tax authority. What I connect is the step that creates the invoice from the order data without anyone typing it. Your accountant decides which documents you need and when, and I fit the flow to that.
What happens if I change webshop platform later?
I build the integration so the webshop is only one end of it. If you move to another platform, that part gets rewritten; the invoicing, stock and courier connections stay.
Tell me where things stand
A few sentences about the situation and what you want are enough. I reply within one working day, and we book a 30-minute call.