Web & e-commerce
Websites, online shops, shop migrations and custom integrations — clean, fast, maintainable.
Sauerwein Group · Austria
We build products, brands and the systems for your business.
An Austrian group of brands that manufactures, runs its own shops, shipping and payment infrastructure, and writes the software connecting all of it. From switchboard wiring to AI automation — we design it, build it and run it.
- Sourcing & distribution
- E-commerce
- POS & ordering systems
- IoT & control systems
- AI automation
- Payment integration
- Print & textile
- Fulfilment
From first sketch to running system
Hardware, software, web, payment and print are built in-house and interlock.
AI & automation
Mail bots, chatbots, document and receipt recognition, process automation — EU AI Act compliant and transparent.
POS & ordering systems
Ordering interfaces, table ordering, kitchen workflows and connections into existing point-of-sale systems.
Inventory & stock control
Stock kept at unit level with change logs, automatic availability and idempotent restocking.
Payment & accounting integration
Stripe, myPOS and SumUp, plus bookkeeping systems such as sevDesk, wired into existing setups.
Wholesale & catalogue integration
Product data, stock and prices from wholesaler APIs and EDI feeds into shops and ERP.
Product configurators
Customers assemble a product and get a photorealistic image of their own configuration, rendered server-side.
Hardware, IoT & control systems
Siemens SIMATIC PLC and Linux/Raspberry Pi systems — from the sensor to the cloud.
Print & textile finishing
Embroidery, printing and DTF through our Druckstick brand — with a showroom in Eisenstadt.
Merch solutions
Ready-made merch shops for clubs, companies and creators through our Merchbase brand.
Lighting & event technology
From qualified lighting-master and event background — available as a capability.
Systems and products we have built
Built and running. A selection of the systems we have delivered — for customers and for our own operations.
Visual product configurator
The customer assembles a product and receives a photorealistic 1024×1024 image of their own configuration, rendered server-side by stacking cut-out component photos in the correct build order. Components that go on last really do appear on top.
What it provesAny manufacturer of configurable products — bundles, signage, merch, variants — needs exactly this and rarely has it.
Ordering system with kitchen workflow
Sales prices are calculated from the purchase price per portion times a margin and rounded up to ten cents; the portion stock decides automatically what is still orderable. New orders are pushed to the kitchen via messenger with status buttons, and cancellations restock ingredients and drinks.
What it provesCosting, stock control and floor workflow in one system.
Modular POS front end
A sellable input interface for hospitality: table plan, item entry, ordering and payment. An adapter layer keeps it independent of the underlying till, which retains all fiscally relevant operations. Module system with signed licensing and a demo/live safety switch.
What it provesWe build licensable products, not only one-off commissions.
Our own Android POS app
A native Android app that runs the point-of-sale interface full screen on the tablet and drives Bluetooth receipt printers directly — something a browser cannot do, because browsers only speak Bluetooth Low Energy while thermal printers use Bluetooth Classic. The tablet enrols itself by scanning a QR code; a hidden maintenance screen sits behind a two-second press on the corner. No business logic and no data live in the app.
What it provesWhere the browser runs out of road, we build the missing piece as a native app instead of dropping the requirement.
QR table ordering
Guests scan a QR code at the table, order, and the order is booked onto the correct table in the existing till system and runs out to kitchen and bar. Tables carry unguessable codes rather than numbers, so nobody can order onto someone else's table from outside.
What it provesIntegration into a third-party fiscal system in live operation.
Insurance customer portal
Customer portal with structured intake flows for motor, household and property cover, deregistrations and payment changes. Ticket statuses, priorities, attachments, insurer management and PDF generation.
What it provesIndustry software with real domain vocabulary, not generic forms.
Apartment management assistant
Reads bookings from the booking platform API, collects missing guest registration data through a bilingual pre-check-in link and prepares it in the format the tourism authority requires. Plus an arrivals board and a daily pricing recommendation based on occupancy, weekends and events, with configurable guard rails.
What it provesStatutory guest registration automated, plus revenue management.
Hotel booking assistant
Queries real availability and prices live, suggests the best room combinations, accounts for children and generates pre-filled booking links.
What it provesAI working on live operational data, not on a static knowledge base.
Purchasing and supplier optimiser
Compares articles across suppliers in several countries including each one's shipping rules and packing logic, then calculates the cheapest split. With order history, supplier mail templates and shipping labels.
What it provesWe already run cross-border supplier relationships operationally.
AI receipt scanner
Photograph an invoice, get amount, date, merchant and category back — via vision AI, with a cost log per request.
What it provesThe concrete evidence behind the phrase AI automation.
Trip planner with mapping
Map with waypoint geocoding, AI cost estimation with caching, photo management that reads EXIF GPS, and shareable trips.
What it provesMaps, location data and AI in one application.
Installable web app (PWA)
Service worker, manifest, installable, works offline.
What it provesInstallable apps without an app store — relevant for kiosk and staff devices.
AI phone assistant
Takes and places phone calls and handles simple requests. Architecture and telephony connection worked out.
What it provesWhere we are heading. Labelled as a concept, not as a product.
Infrastructure we run ourselves
Our own operational backbone — and the reason we can take on distribution, not just development.
Central shipping hub
One hub handles shipping for five of our brands. Brands call the hub API, the hub talks to the carriers and returns the label PDF and tracking. Status is polled every 30 minutes and forwarded HMAC-signed to the right brand, which notifies the customer.
What it provesFulfilment is our own infrastructure, not a bolt-on.
Central payment instance
A single Stripe instance serving four brands, alongside myPOS in production and SumUp validated. Card-present and online payments settle into the same accounting flow.
What it provesCollecting, splitting and settling across multiple brands — the basis of any distribution business.
Accounting integration
Receipts, exports and tax-rate handling flow automatically into the bookkeeping system instead of being typed twice.
What it provesThe money trail does not stop at checkout; it ends properly in the books.
Stock control across brands
Stock kept at unit level with a full change log. Cancellations restock idempotently, so repeated clicks never corrupt the count.
What it provesInventory that survives real-world misuse.
Hardware we build ourselves
Designed, wired, printed and programmed in-house — including the mechanical parts.
Photo booth
In-house design with bill of materials, construction drawings, GPIO and printer testing and a custom output tray for the photo printer. Delivered with quotation and price list to a customer.
What it provesFrom sketch through build to a commercial offer — the full cycle.
Multi-zone projection mapper
Dual-HDMI output, keystone correction via homography, visual zone mapping on canvas, touch-optimised admin and a 3D-printed ceiling mount. Used to project the exact placement onto a textile press.
What it provesOptics, mathematics and an operable interface in one device.
Self-service top-up terminal
Our own Python library against the REST API of a print accounting system, giving customers 24/7 credit top-up in the showroom.
What it provesIntegration into closed third-party systems that move money.
Receipt-printer alerting
Incoming orders print immediately on a receipt printer at the workstation — a physical signal for a digital process.
What it provesDigital events made impossible to miss on the shop floor.
3D design and printing
Magnetic connectors, battery covers, spotlight brackets, vacuum tooling plates and mounts — our own CAD parts for our own devices.
What it provesWhen a part does not exist off the shelf, we design and print it ourselves.
Cashless drinks system
Prepaid account topped up through a web interface, login by chip and barcode scanner, a networked fridge with a magnetic lock that only opens with sufficient balance, automatic capture of what was taken, and a weekly automatic reorder from the wholesaler once the minimum order value is reached.
What it provesElectrical engineering, hardware, payment, web and automation in a single case.
Systems we already connect to
Shops, tills, wholesalers, shipping, accounting and booking channels — the systems we already connect to.
- L-SHOP-TEAM (EDI-XML)
- Malfini B2B API
- ready2order
- sevDesk
- Stripe
- myPOS
- SumUp
- Sendcloud
- Senddrop
- Lodgify
- feratel
- YSoft
- Telegram
- WooCommerce
- netcup
- Claude API
- Booking.com
- Airbnb
- Expedia
- Vrbo
- Agoda
- Hostelworld
- Google Hotel Ads
- TripAdvisor
- Trivago
- HRS
Brands under one roof
Several businesses of our own — each with its own focus, all run from one place.
merkichmir.at
Directory and management platform for local businesses
Druckstick
Textile finishing, embroidery, printing and print production — showroom in Eisenstadt
Druckstick EU
Druckstick for the wider EU market
DTF-Print
DTF transfer printing and supplies
Merchbase
Free merch shops for clubs, companies and creators
Promo Print Supply
International print supply
Secret Service
billig-versenden.at
deine-reifen.at
Tyres and fitting
Pannolio Apartments
Beach boutique apartments in Eisenstadt
KI-Service Austria
AI solutions and automation
Notfallratgeber
AI-guided emergency advice with an online accident report sent straight to those involved and to insurers
Die Vermögensberater
Financial advice — started during the pandemic to help people in difficulty
FunActionSport
Sports and leisure club — co-founded, website built by us
Proof that the combination works
Problem, solution, result. Real projects, built by us.
merkichmir.at — platform and point of sale for local businesses
- Problem
- A small business today needs half a dozen systems that know nothing about each other: a website, online ordering, appointment booking, a fiscal till, a receipt printer, customer records. Neither affordable nor operable at that size.
- Solution
- merkichmir.at is one platform with two faces. Outward a directory where guests find a local business and act straight away — order, book, take an appointment. Inward a management tool spanning restaurants, quick-service, hotels, salons, health and online shops. Every business gets its own address or domain, kept apart from the others down to the database row. Includes a fiscalised till, our own Android app for the tablet, and receipt printers that fetch their jobs themselves. Sold in modules, booked individually.
- Result
- A business assembles what it needs and gets visibility, ordering, till and billing from one system instead of six. Live in production, with its own reseller model.
Shop migration with a custom export API
- Problem
- A WooCommerce shop had to be migrated without data loss.
- Solution
- Migration using an export API we wrote ourselves for articles, categories and stock levels.
- Result
- A clean move with no downtime and no lost data.
Payment integrations
- Problem
- Existing shops needed modern, reliable payment methods.
- Solution
- Stripe, myPOS and SumUp integrated into existing shop systems.
- Result
- Smooth checkouts and cleanly reconciled booking flows.
Projection assistance for a textile press
- Problem
- Designs had to be positioned precisely and repeatably when pressing.
- Solution
- A Raspberry Pi with dual HDMI, Flask, a kiosk browser, QR scanner and a calibrated projector puts the position directly onto the press.
- Result
- Precise, fast, repeatable placement and less waste.
Self-service top-up terminal
- Problem
- Customers had to top up print and chip card credit awkwardly at the counter.
- Solution
- A self-service terminal where customers top up their own credit, built against the print accounting system's REST API.
- Result
- Less counter work, longer availability, happier customers.
AI booking assistant for a hotel
- Problem
- Enquiries about free rooms tied up hours at reception every day.
- Solution
- An assistant that reads live availability and answers automatically with pre-filled booking links.
- Result
- Faster answers, a relieved team and more completed bookings.
Order alerting with a receipt printer
- Problem
- New orders were getting lost in day-to-day business.
- Solution
- A Raspberry Pi solution that prints incoming orders immediately on a receipt printer.
- Result
- No missed order — a physical signal right at the workstation.
Accounting integration
- Problem
- Receipts and turnover were being entered twice.
- Solution
- Automated connection into the bookkeeping system including receipt upload and tax-rate handling.
- Result
- Less manual work and cleaner books.
Cashless drinks system for a club
- Problem
- A club wanted to settle drinks without cash, without loss of trust and without manual tally sheets.
- Solution
- A prepaid system built entirely in-house: top-ups through a web interface, login by chip and barcode scanner on the wall, a networked fridge with a magnetic lock that only opens with sufficient balance, automatic capture of what was taken and connected billing. On top of that the system reorders the missing drinks from the wholesaler once a week — but only when the minimum order value is reached.
- Result
- Cashless, tamper-resistant self-service around the clock plus automatic replenishment — the proof that electrical engineering, hardware, payment and web come from one source.
From switchboard to complete system
I come from electrical engineering — a trained bus and process control technician — and got into programming early through it. Today I connect hardware, software, web and print into complete solutions and run several businesses of my own. I do not just advise; I build it myself.
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01
Electrical engineering
Trained in bus and process control technology. An early start in programming laid the ground for everything that followed.
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02
Lighting master
Qualified in lighting and event technology.
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03
Event management & fire safety
Several years in organisation, safety and fire protection.
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04
Financial adviser
During the pandemic, when much stood still and many people ran into money trouble, I qualified through the chamber of commerce examination board to help in this field as well. That is how dievermoegensberater.at came about.
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05
Emergency guide
Years of volunteering with the Red Cross and the fire brigade led to notfallratgeber.at: an AI-guided service telling you what help you need right now, plus an online accident report that goes straight to everyone involved and to the Austrian insurers — filing it completes the insurance notification.
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06
Today
An entrepreneur running several businesses and building tailor-made solutions — hardware, software, web, payment and print from one source.
What we're looking for
We are buyers as much as we are suppliers. If you manufacture any of the following, we should talk.
Hardware & devices
- Smart home devices
- AI-enabled devices
- Digital signage
- Vending & payment hardware
- Kiosk and self-service terminals
Print & textile supplies
- DTF film, ink and powder at scale
- Transfer presses and embroidery machinery
- OEM and white-label production
- Blank textiles in volume
Software & integration partners
- Products that need a DACH software partner
- Open API or SDK
- POS, IoT, kiosk and signage systems
- Wholesalers with catalogue or EDI feeds
Distribution
- Manufacturers looking for an EU importer
- Brands without a DACH distribution partner
- Suppliers who want their product sold, not just shipped
Tell us what you make and in what volume. If it fits our channels we take care of import, storage, payment, support and after-sales — and we build the software layer around it ourselves. Talk to us early about the EU compliance requirements for your product category.
10 — Contact
Let's talk
Tell us briefly what it is about — we reply personally, usually within one working day.
- Email office@sauerwein.life
- AddressEsterházystraße 42, 7000 Eisenstadt, Austria
- ShowroomEisenstadt — by appointment