TYPO3 agency based in Düsseldorf Complex software. Delivered reliably.

Are you planning a new web application, need support with development, or would you like to modernise an existing system? We take responsibility – from the architecture right through to stable operation.

Discuss your project Discover our solutions

How can we help you?

Software development

You have a goal and challenging technical requirements. We use these to develop a robust architecture and take care of the technical implementation.

Strengthen your team

Are you temporarily short of development capacity or specialist technical expertise? We can supplement your team in the areas of architecture, front-end, back-end, TYPO3 and DevOps.

Modernising software

Your application is up and running, but there’s no one reliably handling updates, monitoring and further development. We’ll take care of operations, maintenance and expansion.

Discuss collaboration

Customers and partners

We work for companies, public bodies, associations and agencies

Our services

We design, develop and operate web applications, platforms and portals to meet demanding requirements. This includes system architecture, UI/UX, front-end and back-end development, the integration of third-party systems and day-to-day operations.

Our tech stack is open source. For the back-end, we prefer to use TYPO3; for e-commerce, Shopware; and for the front-end, Vue and Nuxt. This ensures that the systems we build remain maintainable in the long term and remain under your control.

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Projects

Our projects demonstrate how complex requirements are transformed into functioning systems.

Q3i in figures

Years’ experience in web development

400

projects completed

100

per cent independent and owner-managed

Security incidents in our projects

What we develop

We have the necessary full-stack expertise to develop and operate a wide range of applications for you.

All solutions

Corporate Websites

Integrated corporate websites built with TYPO3, multilingual and multi-site – headless on request.

E-commerce

B2C and B2B shops built with Shopware, integrated with ERP, PIM and your TYPO3 website.

Enterprise Search

Searchable corporate resources, file repositories, PDFs and external databases.

Intranet, Extranet and Portals

Staff intranets, member portals and online service centres.

Real-time and Multi-user

Web applications for events, exhibitions and training courses, where participants, media players and installations interact in real time.

Custom Software

If off-the-shelf software does not suit your processes, we develop a bespoke solution based on open technologies.

“For more than 20 years, we have been successfully developing complex web applications in collaboration with Q3i. This long-standing partnership speaks for itself.“
Ivica Lozina
Head of Interactive at Bosbach Kommunikation & Design GmbH
“We simply enjoy working with Q3i because we know we can rely on one another. The collaboration is straightforward, solution-oriented and always on an equal footing. Particularly when dealing with major clients, Q3i is the technical partner we feel confident bringing to the table and can wholeheartedly recommend.“
Ana-Marija Scheibler
Communication & Design at GENERATIONDESIGN GmbH
“For us, Q3i is far more than just a service provider: thanks to our long-standing partnership, rapid response times and a deep understanding of our brand, the results are always impressive from both a functional and strategic perspective.“
Oliver Striegel
Marketing Specialist at exocad
“For the past ten years, Q3i has been our reliable partner for the technical implementation of complex projects. Q3i works independently, is solution-oriented and always thinks proactively. This builds trust and makes working with them particularly straightforward for us.”
Marko Kosczowsky
Senior Producer at Capture Media GmbH