Your Shopify agency with its own apps in the store.
The Shopify App Studio from Germany for apps, store setup, accounting & e-invoicing — tax-compliant for Germany, Austria & Switzerland, GDPR-ready, hosted in Frankfurt.
From store setup to your own app — all from one team.
Apps we built, launched and scaled ourselves.
A partner who truly understands Shopify.
We use what we build
belegio and zrapp are live in the Shopify App Store — we know merchants’ daily reality first-hand.
Tax & legally correct
ZUGFeRD, XRechnung, OSS, §19 and reverse-charge — we build for the real requirements across the DACH region.
Data stays in Germany
GDPR-compliant, hosted in Frankfurt, DPA included. No data leaves the EU.
You own the code
Clean, scalable code on Remix, Polaris & App Bridge — full source included on custom projects.
Real German support
Personal, in German, Mon–Fri. No ticket ping-pong — direct contacts instead.
The complete lifecycle
From idea through development and App Store launch to maintenance and iteration — all from one team.
We build complete products — and run them ourselves.
zrapp.group is a full-stack agency from Germany. We build complete products — from robust backends (Java, Node, PHP) through modern frontends (React, TypeScript) to hosting, infrastructure and DevOps. Shopify is one of our strengths; with our own apps like belegio and zrapp live in the store, we know what it takes to not just build software but run it reliably.
From idea to launch — in four clear steps.
Discovery
We deeply understand your business, your users and your app idea.
Concept & architecture
Technical concept, scope and a realistic roadmap with a fixed-price option.
Development
Clean, scalable build with regular demos and short feedback loops.
Launch & support
Go-live in the App Store, monitoring and continuous improvement.
Full-stack — from Java to React.
From backend through frontend to infrastructure: modern, durable technologies chosen for maintainability and performance.
Common questions, clearly answered.
From the blog.
Connect Shopify to sevdesk: book orders automatically
Connect Shopify to sevdesk: choose an app, add the API token, transfer paid orders and test tax, refund and e-invoice scenarios.
Connect Shopify to Lexware Office (lexoffice)
Connect Shopify to Lexware Office: transfer paid orders, contacts, delivery notes and e-invoice profiles, with clear refund and email limitations.
Receiving and Sending E-Invoices in Shopify B2B
The receive e-invoice obligation has applied to all B2B businesses since 1 Jan 2025. Set up receiving and sending cleanly in Shopify B2B.
Got a Shopify project?
Whether it’s an app, a new store or a migration: tell us about it. We reply within 24 hours with a first assessment, free and with no strings attached.