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Lukas Günther Teissl
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Development · Websites · Business software

Client projects.Specific contributions.

A new website, an extension to an existing system or technical support for an established site: these references offer a small insight into my client work. Each one explains my specific contribution. Many further projects remain confidential; relevant evidence is available through my PROOF portal after personal review and within the applicable disclosure permissions.

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Lukas TeisslUnderstand requirements. Develop solutions.
A personal favorite in focus★ 01

CareTrade International

Client project
caretrade-international.comEN CareTrade International – Public project view (EN)

Original templates dated 13 Oct 2026 · locally rendered, not a live capture.

Explore the implementation

More than screenshots: features, development contribution and practical purpose.

20Favorites58Project profiles59Domain mappings3Languages
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Further references · Personally released

More experience. Relevant to your project.

This website shows only a small selection of my references. Through my PROOF portal, you can request further relevant project evidence, including work for well-known companies.

For strategic reasons and to protect confidential client relationships, I share these references selectively rather than making them openly available. Describe your project directly in the portal: I personally release the relevant insights within the scope of the respective permissions.

Request further references Explore the PROOF portal

Registration alone does not unlock confidential content. Particularly sensitive documents may require a confidentiality agreement before access.

PROOFproof.lukasteissl.comPrivate access
Supplied English view of the PROOF portal by Lukas Teissl
A look inside the PROOF portal · Original English view
Request in the portal

Describe your project and the insights you need.

Personal selection

Receive relevant, selectively released evidence.

Find a relevant example

A closer look at client work.

Save relevant examples for your project conversation. Search by task, system or domain. Each project page explains the features, my contribution or involvement, and a relevant starting point for a conversation.

You are viewing 11 client projects. Own products and company projects are under “All projects”: 58 profiles covering 59 domains in total.

11 projects found

caretrade-international.comEN CareTrade International – Public project view (EN)
Selected by Lukas Client project

CareTrade International

For CareTrade International, I implemented a multilingual company website bringing together product areas, project information, media and enquiry routes. The project shows how I turn an extensive service offering into an understandable website with clear navigation and a layout that works across devices.

caretrade-international.com
  • Websites
  • Business systems
Explore the implementation · CareTrade International

The order is editorially selected. Other projects remain accessible through the categories and the domain directory.

Complete overviewThe complete domain directoryAll 59 domains · linked to 58 project profiles

Each address leads to its project description. Multiple domains of the same application share one profile.

The two Meeting addresses belong to one application. AndiHood IT Services and the AndiHood video platform are separate projects.

From your requirements to implementation

Good software starts
with the right question.

What should become simpler, clearer or better connected for you? That is where my development approach begins. These references offer concrete starting points for your own plans.

Understand the workflow

We start with your goals, users and existing systems. A concrete working process often tells us more than a long list of technical keywords.

Define the right scope

We clarify features, priorities and dependencies. The aim is a practical implementation proposal based on your situation, not a rigid standard solution.

Connect development and usability

Features need to work together and make sense in everyday use. For me, technical implementation, user experience and ongoing project discussion belong together.

An additional company perspective

More references from my business environment

A further selection of references from my company is available at Lion InterGroup Informatics.

View Lion InterGroup references

Additional company references; they are not all attributed to me as personal development work. Destination language: German

References / Proof

Explore the work.
Review the qualifications.

Project examples demonstrate my approach. Certifications, a professional overview and my résumé provide additional context and evidence.

Central proof portalCertifications & evidenceProfessional overviewRésumé
Professional background ↗My books ↗My courses ↗

Not everything I develop is public.

Confidential systems and client materials without publication permission remain protected. Further relevant insights can be discussed within the applicable permissions.

From an example to your own project

Your requirements.
A fitting solution.

You do not need a finished specification to get started. Tell me what your website or software should do, who will use it and which systems are already in place. In an initial conversation, we can identify a sensible starting point and the next steps.

Discuss your project

A typical workflow, your goal and your existing systems are enough to start.

Portfolio Atelier

My project shortlist

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