Shopware as a Point-of-Sale system: How Siena Garden uses a POS solution to enable local direct sales to end customers
Find out how synaigy developed a complete POS system for Siena Garden based on Shopware 6, enabling direct local sales to end customers for the first time. Without a requirements specification, on time and within budget, featuring a unique combination of hardware integration, legal compliance, and omnichannel architecture.
From Wholesale to Direct Sales with Shopware at the Point of Sale
The H. Gautzsch Group is a long-established wholesaler that is venturing into direct sales to end customers with its Siena Garden brand. While the online store was already running on Shopware 6, the ability to sell directly to end customers in brick-and-mortar stores had been missing until now. It is the POS system developed by synaigy and based on Shopware that makes this local direct sales model possible.
The solution is a native Windows app with an embedded Next.js front end, its own Shopware plugin, direct hardware integration (card terminal, receipt printer, scanner), and built-in KassensichV compliance. What makes it special is that a dedicated core team built the system in short cycles without a traditional requirements specification, while staying on schedule and within budget.
About Siena Garden und H. Gautzsch
The H. Gautzsch Group is a network of leading medium-sized specialty wholesalers with more than 70 locations in Germany and Austria. With over 1,400 employees and two business divisions (electronics and home and garden), the family-owned company from Münster has been in business for over 160 years.
Siena Garden is the company’s own brand in the home and garden sector. Traditionally, H. Gautzsch has distributed its products to retailers through specialty wholesalers. With its Shopware-based online store, Siena Garden has already taken the first step toward direct sales to end customers. However, local direct sales in its own stores had not been possible until now because the necessary point-of-sale infrastructure was lacking.
Starting point: From wholesaler to D2C retailer, but without a point-of-sale system for their own store
Siena Garden had a clear strategic goal: to transition from being purely a wholesaler to selling directly to end customers. This shift had already been successfully achieved online with the Shopware store, but the crucial piece of the puzzle was missing in brick-and-mortar retail. Without its own point-of-sale system, the company couldn’t support local direct sales to end customers, and conventional solutions didn’t meet its requirements.
It quickly became clear that local direct sales to end customers would only make economic and operational sense if they ran on the same platform as the online store. Shopware had to evolve from a pure web store system into a commerce engine for all channels, including the point-of-sale system in the company’s own store.
No system integration
Traditional point-of-sale systems are closed, standalone solutions that do not connect to the online store. Products, prices, and coupons would have to be maintained in two separate systems.
Separate customer Profiles
A customer who shops online and in-store would be treated as two different people in two separate systems. A true D2C customer relationship would be fragmented from the very beginning.
Parallel data world
The entire product catalog and inventory logic was built into Shopware. A separate checkout system would create a parallel data environment and multiply the operational effort for the new channel.
No suitable POS integration
No POS system available on the market offered the necessary integration with Shopware to run direct sales from a single commerce engine.
Project goals: Shopware as an enabler for local direct sales
To enable local direct sales to end customers, clear goals were defined together with Siena Garden:
Shopware as single source of truth
Products, prices and customer data are managed centrally in Shopware and apply uniformly to online shop and POS.
Full-fledged checkout system
Not a light version or a plugin compromise, but a standalone checkout application with professional hardware connectivity.
KassenSichV compliance
The system has to pass every cash register audit from day 1, including cloud TSE, mandatory receipt issuance and DSFinV-K export.
Security by design
A hardened architecture that also stands up to the requirements of a company with more than 70 locations.
In time and on budget
Implementation without a classic requirements specification, iteratively with a fixed core team instead.
As Siena Living, we want to take the next step and, as an online pure player, also sell directly on the shop floor. Without our Shopware-based checkout system, that would simply not have been possible in brick-and-mortar retail. synaigy understood what we need and delivered.
The Solution: A Point-of-Sale System on Shopware, from Architecture to Receipt Printer
Shopware Plugin and Custom Architecture
At the heart of the solution is a custom-developed Shopware plugin. It introduces a new “Store” sales channel type that leverages Shopware’s entire logic for pricing, promotions, and customer data, but operates within a clearly separated scope. In addition, the plugin includes its own entities for POS configuration, store inventory, and employee management. Authentication is handled via a PIN-based login with role-based access control.
Electron App with Next.js Frontend
The POS application itself is a native Windows application based on Electron with embedded Next.js 15 and React 19. This architectural decision was made deliberately, as only a native desktop app enables direct communication with hardware peripherals via operating system interfaces without relying on limited browser APIs.
Hardware Integration: Card Terminal, Receipt Printer, Scanner, Customer Display
The POS solution controls all relevant hardware components directly from the Electron app:
Card Terminal: Integration of the debit and credit card terminal (TCP/IP). The payment amount is automatically transferred to the terminal, and the payment status is reported back. The terminal processes card data completely standalone—the app never receives sensitive card data.
Receipt printer: DIN A4 receipt printing via the Windows print spooler. The print templates are rendered in Shopware and contain all legally required information, including the TSE signature and transaction reference.
Legal Compliance: KassensichV, TSE, and GoBD Compliance
Compliance is a core component of any point-of-sale system’s architecture. The solution meets all requirements of the Point-of-Sale Security Regulation (KassensichV):
Cloud TSE connection with a cryptographic signature for every transaction and fallback logic in case of connection interruption.
Full receipt issuance requirement: Every receipt contains a TSE signature, transaction number, serial number, and QR code.
DSFinV-K export for tax audits is implemented by default.
GoBD-compliant, tamper-proof storage of all point-of-sale transactions
What made the project special
Without specifications, on time and within budget
Instead of starting with a 200-page requirements specification, a dedicated core team with direct access to customers worked in short cycles. Trust and quick decisions instead of a waterfall model. The result is a production-ready point-of-sale system, delivered on time.
Unparalleled level of integration
The combination of native hardware control, a hardened Electron architecture, a custom Shopware plugin, and integrated Cloud-TSE is unique within the Shopware ecosystem.
Shopware as an enabler for direct sales
Without the Shopware-based point-of-sale system, there would be no local direct sales. The custom sales channel type “Store” turns Shopware into a commerce engine for the physical store, with the same prices, promotions, and customer data as in the online store.
Results: local direct sales with Shopware as a unified commerce platform
With the Shopware-based checkout system, Siena Garden has made the leap from pure online D2C into local direct sales. Only this solution makes it possible to sell directly to end customers in the company's own stores while drawing on the same commerce engine as the online shop.
Local direct sales to end customers are possible for the first time. Siena Garden can sell in its own stores without having to set up a separate checkout infrastructure.
The online shop and the store run on one platform. Products, prices and customer data are maintained centrally, without duplicated effort.
100 percent KassenSichV compliant from the very first day of use. The solution passes every cash register audit.
A scalable architecture that is prepared for the rollout to further locations and international markets.
Key takeaways from the POS project
The project has shown that even highly complex systems can be developed in a pragmatic way when trust, team stability, and technical excellence come together.
Trust beats a requirements specification
A fixed core team with direct access to the customer and short decision cycles delivers faster and more precisely than a classic waterfall process.
POS is not a side project.
The depth of integration in hardware, law and security must not be underestimated. A checkout system requires the same care as an online shop.
The right partner at your side.
Without a client who decides quickly, keeps their nerve and keeps the team's back free, this result would not have been possible.
Electron is the choice for native hardware
If you have to control receipt printers and card terminals directly, browser APIs will not get you far. Electron offers the best of web technology and native OS integration.
Compliance belongs in the architecture
KassenSichV, TSE and GoBD have to be considered from the outset. Retrofitting is more expensive and more error-prone.
Are you planning to set up a Shopware-based point-of-sale system or make the move to direct sales?
Let's talk about your project.
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