Service / End to end, one contact
Online shop integrations: marketplaces, suppliers, accounting and shipping
Orders, prices, stock and invoices move between your shop, marketplaces, suppliers and accounting software on their own, without retyping.
- Amazon, Allegro, Kaufland, bol.com and other marketplaces
- Supplier feeds and dropshipping: XML, CSV, API
- Accounting, invoicing and KSeF
- BaseLinker, couriers and payments
Free first call · I usually reply within 2 h
- 12+
- years in websites, apps and marketing
- 150+
- projects: I help at every stage, from idea to growth
- 2–6 wks
- from idea to a working product
- 2 h
- usual time to my reply
Scope
What I connect
Marketplaces
Amazon, Allegro, Kaufland, eBay, Otto, bol.com, Empik: listings, prices, stock and orders back in the shop, across EU markets.
Suppliers and dropshipping
Supplier XML, CSV or API: new products, prices with margin, stock, and orders sent to the supplier automatically.
Accounting and ERP
Subiekt, Optima, enova, lexoffice, sevDesk, Exact Online: orders, documents, stock and prices in both directions.
Invoices and KSeF
Invoicing software via API: invoice after payment, correction after refund, the KSeF number on the order in Poland.
BaseLinker
Setup plus what BaseLinker can't do alone: custom actions, unusual sources and a connection to your system via API.
Couriers and payments
InPost, DPD, DHL, GLS: labels and tracking. Stripe, PayU, Przelewy24 and recurring payments.
Pricing
Packages
Ready-made integration
Individual quote
from 1 working day
A plugin, app or BaseLinker that already handles your case.
- Choosing and configuring the tool
- Mapping categories, prices and stock
- Test on a few products and orders
- Instructions for you and your team
Custom integration
Individual quote
from 1 week
One system that ready-made tools don't handle well.
- A marketplace, supplier or accounting software
- Rules for prices, margins and stock
- Orders and documents in both directions
- Error alerts
Several systems
Individual quote
from 2–3 weeks
Shop, marketplaces, suppliers and accounting in one process.
- Everything in “Custom integration”
- Several sources and sales channels
- Custom shop or system via API
- Queue, retries and logs
What clients say
„We worked with Vlad on a Next.js project. He knew what he was doing from day one, didn't overcomplicate things and came up with better approaches on his own. I especially value his work on the site's performance. Everything was delivered as agreed.”
George B. CEO, finance company
„We needed to build an MVP fast to test our idea in practice. Vlad helped us choose sensible solutions and focus on what we really needed for launch. We didn't try to build everything at once, yet he made sure the project could grow later without starting from scratch.”
Alex N. Product Manager at StartupX
„Vlad got up to speed with our project quickly and pointed out several problems we hadn't treated as priorities. He sorted out our database and security issues. I liked that he didn't just complete tasks but clearly explained why something was worth changing and what the consequences could be.”
Michał R. CTO at TechCorp
„We had an app where every bigger change was becoming a problem. Vlad helped us clean up the code, rebuild some of the older parts and introduce automated tests. Working on new features is much easier now. I also appreciate his patience in explaining technical topics to people outside the development team.”
Sara K. Product Owner at WebSolutions
Find out what your shop needs
Tell me what your shop runs on and what you want to connect: a marketplace, a supplier, accounting software. I'll reply whether a ready-made tool is enough and what it costs.
Frequently asked questions
I already use BaseLinker or a plugin. Why would I need a developer?
Ready-made tools cover the typical case and are often enough; then I set them up and tell you so. A developer is needed for what the tool doesn't do: an unusual supplier feed, your own pricing rules, bundles and variants, documents in your accounting software, a custom shop or system. I write only that part and keep the rest on the ready-made tool.
Which shop platforms do you work with?
WooCommerce, PrestaShop, Shopify, Shoper and custom shops (Laravel, Next.js, headless). If the platform has an API or database access, it can be integrated; I check what it exposes before quoting.
Which marketplaces can you connect?
Amazon in Germany and other EU countries, Kaufland, eBay, Otto, bol.com, Cdiscount, Allegro in Poland, Czechia and Slovakia, Empik and Erli — through their APIs or BaseLinker. I set up currencies, prices per market, translated listings and orders flowing back to the shop. Tax and shipping rules for each country are for you and your accountant to decide; I implement them technically.
How often do supplier prices and stock update?
It depends on the supplier: some publish a file once a day, others an API that can be checked every few minutes. I update as often as the source allows, with margins, rounding and a safeguard: a product the supplier ran out of is taken off sale before someone buys it.
Which accounting and invoicing software can you connect?
Polish systems such as Subiekt, Comarch Optima, enova, Symfonia, Fakturownia, wFirma and inFakt, KSeF e-invoicing, and international ones with an API such as lexoffice, sevDesk, Exact Online or Moneybird. Desktop software installed in the office usually needs a small connector on the machine where it runs; I check the version before quoting.
How much does a shop integration cost?
I give the exact price after a short description of your shop and systems.
How long does it take?
Setting up a ready-made integration usually takes from 1 working day, a custom integration with one system from 1 week, several systems from 2–3 weeks. I give the timeline before we start.
What happens when a marketplace or supplier changes its API or file?
The integration checks data before saving: an unexpected format stops the update and sends an alert instead of zeroing prices or stock. Support covers adapting the integration to API and format changes.