ERP, B2B/B2C portals, DATEV integration, industry-specific software. Our 12-year team builds with the latest tech, automates manual work and cuts headcount needs. Fixed price, 12-month warranty — GDPR-compliant hosting in Frankfurt.
Technologies & Integrations We Work With
What We Build
One budget, one team — instead of juggling 12 freelancers. Frontend, backend, mobile, devops, AI — all under our roof, hosted in German data centres.
Inventory, orders, production, finance, CRM, B2B order portal. Two-way integration with SAP S/4HANA, Microsoft Dynamics 365, DATEV, Lexware, Sage 50. Role-based access, multi-site setup, MwSt-compliant (19%/7%).
Amazon DE, Otto, Zalando, Kaufland, eBay DE, MediaMarkt, Hood.de. Sync product/stock/price from a single portal. Order automation, shipping integration (DHL/DPD/Hermes/GLS), VerpackG and ElektroG compliant.
One codebase, two platforms with React Native. App Store + Google Play publishing included. Push notifications, offline mode, biometric login, in-app payments (Stripe/Klarna/PayPal/SEPA).
Customer-service chatbot, product description generator, invoice OCR reader, smart stock forecasting, customer segmentation. Choose from OpenAI GPT-4, Claude, or our own model — hosted in the EU.
XRechnung, ZUGFeRD, e-Rechnung (mandatory from 2025). Two-way with DATEV, Lexware, Sage 50, Sevdesk, Lexoffice. ELSTER interface, GoBD-compliant archiving, BMF/Finanzamt submission, UStVA prep.
Logistics (TMS/WMS), healthcare (KIM/TI-connected HIS), education (LMS), construction (Aufmaß+DATEV), restaurants (POS+QR menu+Lieferando), real estate (CRM+ImmoScout), wholesale (B2B+SAP). A team fluent in your industry.
Real Results
One portal + one operator replaced 5 people doing manual work. Here are a few examples from Germany.
1,400 daily shipments tracked manually in Excel; moved to a QR-barcode mobile + desktop portal wired to DHL and DPD APIs. Warehouse-HQ sync in real time, route optimisation.
11 stores, 18,000 SKUs, 3 warehouses. Stock drift caused over-sales. Central portal + SAP Business One + AI stock forecast, VerpackG (LUCID) & ElektroG (WEEE) automated.
Appointments, ePA, eRezept, eAU, KIM mail, Telematikinfrastruktur across 8 practices. GDPR-hosted in AWS Frankfurt. iOS/Android patient app with gematik login included.
Site manager logs daily hours, material requests, and photo progress on mobile. Live dashboard for the project lead, automatic DATEV payroll handover incl. SOKA-Bau filings.
14-branch restaurant chain. Waitstaff reduced by 38% — customers order via QR, the kitchen screen updates automatically. Lieferando orders flow directly into the kitchen.
240 dealers placed orders by phone/email/fax. A B2B portal + two-way SAP S/4HANA integration automated order > XRechnung > DHL shipment with customer price lists and tiered discounts.
How We Work
No months of agile waffling. Fixed price, fixed timeline, weekly demos. No surprise invoices or disappearing PMs.
We discuss your processes (60-90 min, remote or on-site in Berlin/Frankfurt/Munich/Hamburg). We map current software, problems, goals. Within 3 business days you receive a fixed-price, module-by-module quote and timeline. No commitment.
Wireframes + clickable prototype in Figma. We walk the screens together and you sign off. Data model, integration map, GDPR processing register and API spec documented.
Frontend + backend + mobile in parallel. Cursor + Claude/GPT-4 deliver 40% faster code. Weekly live demos + screencasts. GitHub access open — you can see the code yourself.
SAP/DATEV/Lexware, e-Rechnung (XRechnung/ZUGFeRD), marketplace APIs, Stripe/Klarna/PayPal, DHL/DPD/Hermes — all integrated. We test together in UAT. Bug list closed within 48 hours.
2-3 live training sessions for your team (recorded). Server deployment in AWS Frankfurt or Hetzner (GDPR-compliant), SSL, backups, monitoring. Soft launch — pilot users for 1 week. Then full handover.
12 months of free bug-fix warranty. Then an optional maintenance plan (hourly or monthly package). 24/7 monitoring — 99.9% uptime SLA. New feature requests added via monthly sprints.
Local marketplaces, carriers, payment methods and compliance frameworks — from a single panel
A organik gıda ihracatçısı in München
"GmbH kuruluşundan 6 ay sonra Amazon.de'de top 100 satıcı oldu"
Custom Quote
No off-the-shelf price tags. We listen to your needs, scope the modules, and deliver a fixed-price + fixed-timeline quote within 3 business days. The call is free, no commitment.
Whatever the scope, the following are standard — no extra charge.
Bring these and we will produce an accurate quote in 60 minutes.
We work on a fixed price + fixed timeline. The delivery date is in the contract; if we are late, we pay a 3% weekly penalty (capped at 20%). We can do this because we define scope tightly up front, prevent scope creep, and use AI-assisted coding to keep on plan. 23 of our last 24 projects were delivered on time or early (reference list shared on the discovery call).
**The code is 100% yours.** The GitHub repo is handed over at no extra charge. You can continue with any other software firm or hire developers in-house. Vendor lock-in is not our model — we keep clients with quality, not with contracts.
The opposite. Our senior developer working with Cursor + Claude/GPT-4 ships ~40% faster and with 25% fewer bugs than a solo developer (our own measurements). AI writes code, but architecture, code review and tests are run by our 12-year team. Result: same quality, faster, cheaper.
Fully GDPR-compliant. Standard hosting in **AWS Frankfurt** or **Hetzner (Nuremberg/Falkenstein)** — data never leaves the EU. Data Processing Agreement (DPA) under Art. 28 GDPR included, technical and organisational measures (TOMs) documented, processing register prepared. On request: ISO 27001-certified data centres or on-premise deployment in your infrastructure.
Logistics, e-commerce, healthcare (KIM/TI), education, construction (DATEV payroll), restaurants, real estate, wholesale, mechanical engineering, automotive, trades — we have live projects across these in Germany. If your industry is not on the list, on the discovery call we will introduce you to 1-2 similar clients.
**Marketplaces:** Amazon DE/EU/US, Otto, Zalando, Kaufland, eBay DE, MediaMarkt, real.de, Hood.de, About You, Limango, Etsy. **ERP/Accounting:** SAP S/4HANA, SAP Business One, Microsoft Dynamics 365, DATEV, Lexware, Sage 50, Sevdesk, Lexoffice, BMD, Addison. **e-Rechnung:** XRechnung, ZUGFeRD, Peppol, ELSTER. **Payments:** Stripe DE, Klarna, PayPal, Sofortüberweisung, Giropay, SEPA direct debit, Mollie. **Shipping:** DHL, DPD, Hermes, GLS, UPS, FedEx, DHL Express. If a system you need is not listed but has a REST/SOAP API, we can integrate it.
No — the code is yours and you run it. During the 12-month free warranty every bug is on us. After 12 months: (1) keep going with your own developer, (2) sign a monthly maintenance plan with us (packages: 8 hrs/mo €720 — 40 hrs/mo €3,200), (3) buy hourly support (€130/hr). No contract required. All prices plus 19% MwSt.
Yes, **XRechnung and ZUGFeRD are standard in every accounting module** — since 1 January 2025, e-Rechnung is mandatory for B2B (Wachstumschancengesetz / §14 UStG). Our ERPs send and receive XRechnung 3.0 and ZUGFeRD 2.3, validate via the Peppol network and archive GoBD-compliant for 10 years. VerpackG (LUCID) and ElektroG (WEEE) filings available as a module.
Germany's enterprise software ecosystem is unique. Every German company works with a Steuerberater (tax advisor), and roughly 95% of those Steuerberater run on DATEV. Industrial economics are anchored in Industrie 4.0 and OPC-UA. Mid-market and corporate stacks revolve around SAP Business One and S/4HANA. Accounting must satisfy the GoBD principles for digital record-keeping. Anyone building bespoke software for the German market must master all four worlds simultaneously.
More than 80,000 Steuerberater operate in Germany, and almost all of them push their bookkeeping through DATEV Unternehmen Online. To exchange data with your customer's Steuerberater your software must support one of the official DATEV interfaces: the legacy DATEV-Format CSV/ASCII export, the modern DATEVconnect REST API or XRechnung/ZUGFeRD e-invoice handover.
A typical 100-500 employee Mittelstand company runs SAP Business One or a German-bred ERP like ABAS. From 500 employees upward, SAP S/4HANA becomes the standard. Two-way integration means OData V4 services, RFC/BAPI calls or, increasingly, the new SAP Integration Suite.
| System | Typical Customer | Integration Path | Licence/year |
|---|---|---|---|
| DATEV Unternehmen Online | All SMEs | REST / CSV | €600-2,000 |
| SAP Business One | 50-500 employees | DI-API + SLD | €3,000-15,000 |
| SAP S/4HANA | 500+ employees | OData V4 / BAPI | €25,000+ |
| ABAS ERP | Machine builders | EDP-Plus | €7,000+ |
| Sage 100/200 | Services sector | Web Connector | €2,500-8,000 |
Along the Stuttgart-Bavaria axis — automotive suppliers, machine builders, press shops — Industrie 4.0 is a daily reality, not a buzzword. To read data off a Siemens S7-1500 PLC, Beckhoff TwinCAT or B&R controller you talk OPC-UA. MQTT Sparkplug and Profinet are common companions. If your software runs at the edge as Docker, build in a Rancher- or Portainer-style remote deployment layer; it's where Mittelstand operations are heading.
The GoBD — the Bundesfinanzministerium principles for orderly digital record-keeping — require that every financial transaction be stored in an immutable, chronological, complete and auditable log. When your software amends an invoice, delivery note or stock movement, you cannot overwrite the previous version; only a "storno plus new posting" pattern is allowed.
In practice this drives event-sourcing or hash-chained ledger (Merkle tree) designs at the database layer. WORM storage and long-term retention rely on S3 Object Lock or iTernity iCAS appliances.
Germany's B2B e-invoicing mandate phases in from 2025; by 2027 all domestic B2B invoices must use structured formats. The two relevant formats are ZUGFeRD (hybrid PDF with embedded UBL/CII XML) and XRechnung (pure UBL/CII XML; mandatory for B2G). If your software cannot generate them natively, open-source libraries such as Mustang Project, Konik and Open-Xchange give you a credible starting point.
A common foreign-vendor mistake is selling SAP-sized stacks to a 200-person family-owned manufacturer in Schwäbisch Gmünd. They don't want SAP — they want a flexible, fast middle-tier system that talks to their Steuerberater, integrates with the shop floor and can be customised under their own brand. Modularise: CRM-Lite, Auftragsverwaltung, Lieferschein, MDE/BDE shop-floor data capture, Lohnbuchhaltung bridge.
German enterprise buyers will choose between AWS Frankfurt, Azure Germany or Open Telekom Cloud. Defence, healthcare and public-sector contractors increasingly insist on BSI C5 certified sovereign-cloud operators — STACKIT, plusserver, IONOS Cloud, Hetzner Cloud — so design your deployment topology accordingly.
German clients distinguish Lastenheft (requirements specification) from Pflichtenheft (implementation specification) and stick to the wording in court. They also differentiate Werkvertrag (work-and-deliverables contract) from Dienstvertrag (services contract); pricing a Werkvertrag at fixed cost without watertight scope is how foreign teams lose money in Germany. ZunaPro structures every German engagement under BGB § 631 and VOB/B with explicit Pflichtenhefte.