Shopify App Development & Custom Solutions for Your Business
We build custom Shopify apps, develop tailored features and create high-performing stores that convert.
- Private & Public Shopify Apps – from concept to App Store
- Custom Shopify Development with Liquid, React & Node.js
- API Integrations: ERP, CRM, Inventory & more
Trusted by
Sound familiar?
Many Shopify merchants struggle with the same problems. We solve them.
Your store is growing, but the tech isn't keeping up
Manual processes, missing automation, and a tech stack that doesn't scale – costing you time and revenue.
Freelancers deliver code, not strategy
The code works, but nobody thinks about maintainability, performance, or next steps.
App Store apps don't fit 100%
Standard apps solve 80% of the problem. The last 20% cost you conversions and customer satisfaction.
Integrations take forever
ERP, CRM, inventory – your systems don't talk to each other and your team works with copy-paste.
Our Services
From custom Shopify apps to complete store setups – we're your technical partner for everything Shopify.
Shopify App Development
Private apps for your store or public apps for the Shopify App Store. We build scalable, secure apps with a modern tech stack.
Learn moreCustom Shopify Development
Custom theme development, Liquid programming, checkout extensions and frontend features that drive your business forward.
Learn moreStore Setup & Support
Professional Shopify store setup including theme configuration, app integration and ongoing technical support.
Learn moreShopify Integrations & APIs
Seamless connection of ERP, CRM, PIM and inventory systems to your Shopify store via REST and GraphQL APIs.
Learn moreWhat Our Clients Say
„CodeThat redesigned our online shop and guided us with great expertise throughout the project. The team was always quick to respond, focused on solutions and delivered on every request. We're very happy with the result and the value for money is spot on.“
„We have been working with CodeThat for several years and have not only optimized our Shopify store, but also adapted and modernized our entire CRM system so that all figures and facts are now available in real time. Industrial-grade standards for the trades. Absolutely amazing!“
„We're completely satisfied with the collaboration. Service, communication and execution were consistently professional, reliable and pleasant before, during and after the project. Everything was implemented exactly as we envisioned. We highly recommend working with CodeThat and look forward to future projects together.“
„We've had the pleasure of working with CodeThat for a few years now across multiple stores. Their team consistently listens to our needs and flawlessly brings our website visions to life. What truly sets them apart is how they always go the extra mile, offering brilliant recommendations and solutions we wouldn't have thought of ourselves. We wholeheartedly recommend CodeThat to any Shopify store owner looking for top-notch customization and expert coding. Thank you, CodeThat!“
„CodeThat were instrumental in accelerating our Shopify app development. They are true experts when it comes to Shopify and added real value from the design and planning of our app through to implementation and launch. It has been a pleasure working with them throughout the process, and we have always felt that we were in very good hands with a team that genuinely understands Shopify apps. We would highly recommend CodeThat to anyone looking for an experienced and reliable Shopify app development partner.“
„We have been working with the team for around 7 years and are extremely happy. The collaboration is straightforward, reliable and always at eye level. Requests get implemented quickly and you can tell they really think along and find solutions. Exactly what you would hope for. Clear recommendation.“
„CodeThat redesigned our online shop and guided us with great expertise throughout the project. The team was always quick to respond, focused on solutions and delivered on every request. We're very happy with the result and the value for money is spot on.“
„We have been working with CodeThat for several years and have not only optimized our Shopify store, but also adapted and modernized our entire CRM system so that all figures and facts are now available in real time. Industrial-grade standards for the trades. Absolutely amazing!“
„We're completely satisfied with the collaboration. Service, communication and execution were consistently professional, reliable and pleasant before, during and after the project. Everything was implemented exactly as we envisioned. We highly recommend working with CodeThat and look forward to future projects together.“
„We've had the pleasure of working with CodeThat for a few years now across multiple stores. Their team consistently listens to our needs and flawlessly brings our website visions to life. What truly sets them apart is how they always go the extra mile, offering brilliant recommendations and solutions we wouldn't have thought of ourselves. We wholeheartedly recommend CodeThat to any Shopify store owner looking for top-notch customization and expert coding. Thank you, CodeThat!“
„CodeThat were instrumental in accelerating our Shopify app development. They are true experts when it comes to Shopify and added real value from the design and planning of our app through to implementation and launch. It has been a pleasure working with them throughout the process, and we have always felt that we were in very good hands with a team that genuinely understands Shopify apps. We would highly recommend CodeThat to anyone looking for an experienced and reliable Shopify app development partner.“
„We have been working with the team for around 7 years and are extremely happy. The collaboration is straightforward, reliable and always at eye level. Requests get implemented quickly and you can tell they really think along and find solutions. Exactly what you would hope for. Clear recommendation.“
Ready for your Shopify project?
Tell us about your plans. We'll get back to you within 24 hours.
Or email directly: [email protected]
Selected Projects
From custom apps to shop migration – a selection of our work.
Address Ninja
Our own public Shopify app for checkout address validation – built, earned the Built for Shopify badge and acquired by an investor in 2025.
Learn more
Mapular
Complete rebuild of the existing Shopify app for better UX, performance and a modern Shopify architecture.
Learn more
Secend
Relaunch with a new Shopify theme, custom store logic and ongoing support for the Swiss food waste shop.
Learn more
Purora
Shopify optimizations ahead of their TV appearance: we got Purora's store ready for Die Höhle der Löwen.
Learn more
Semco
Relaunch, custom calculators and long-term technical support for the US provider of waterproofing solutions.
Learn more
MIK Motoren
Long-term technical Shopify partner with a custom app, middleware and centralized processes for the engine specialist.
Learn more
Süß und Clever
WooCommerce-to-Shopify migration and long-term technical support for the organic online shop.
Learn more
Weingut Korrell
Long-term Shopify support with an optimized cart, complex shipping logic and an exclusive VIP area for the winery from the Nahe region.
Learn moreYour store is live? We stay.
Most agencies disappear after the project. With CodeThat Pro we take long-term ownership of your Shopify store – as your external development team.
- Shopify development & feature improvements
- CRO and SEO improvements
- Performance optimization & bug fixes
- Integrations, automations & infrastructure
- One team for everything technical
Our Team
Experienced developers and e-commerce specialists who make your Shopify project a success.
Marvin
Co-Founder & CTO
Denise
Co-Founder & Admin
Jerome
Project Manager
Patryk
Full-Stack Developer
Szymon
Full-Stack Developer
Frequently Asked Questions
How much does a custom Shopify app cost?
Costs depend on complexity and scope. A simple private Shopify app starts at around €5,000, while more complex public apps with admin UI and integrations range from €15,000-40,000. We're happy to provide a custom quote.
How long does Shopify app development take?
A simple private app can be ready in 2-4 weeks. More complex apps with integrations and custom UI take 6-12 weeks. We work agile and deliver regular updates.
Do you only work with Shopify Plus?
No, we work with all Shopify plans – from Basic to Shopify Plus. However, Shopify Plus stores offer additional capabilities like checkout extensions and extended API limits.
Can you modify or extend existing apps?
Yes, we also handle further development of existing Shopify apps. Whether bug fixes, new features or performance optimization – we're happy to help.
What integrations can you build?
We integrate virtually any REST or GraphQL API: ERP systems (SAP, Microsoft Dynamics), CRM (HubSpot, Salesforce), inventory management, payment providers and more. Learn more about our Shopify integration services.
Do you offer ongoing support?
Yes, we offer flexible support packages for ongoing store maintenance and optimization, bug fixes and feature extensions. This keeps your store always up to date.
Do I still need you – with what AI can do today?
AI is a genuine game-changer – for us too. Things that used to take weeks now take days. What has not changed: complex Shopify projects still need someone who understands the architecture, makes the calls and takes responsibility at the end. AI generates solutions faster, but it does not know your store, your requirements or your deadline. We do. The result: you get the speed of AI and the reliability of an experienced team.
Do you use AI in your development work?
Yes, and we think that is exactly right. AI makes us faster – and that benefit passes directly to you. Routine work moves quicker, which means we can spend more time on the parts that genuinely need expertise. The difference from just running everything through AI: we understand what comes out, review it and stand behind it. You get the advantages of modern tooling without the quality loss that happens when nobody is actually looking.