Software that connects what you have with what comes next.
We build custom software, connect systems through interfaces and make your processes mobile – with more than 30 years of software engineering experience, from Cologne.
PHP · Java · modern web technologies
Four fields, one standard: solutions that fit.
We take on the projects we can genuinely do well – and deliver instead of promising.
Custom software
Tailor-made applications for everything off-the-shelf software cannot do – from new builds to modernising what you already run.
Find out more →
Integration, middleware & APIs
Connecting systems that were never designed for each other: interfaces, data formats and middleware – legacy systems included.
Find out more →
Apps & web applications
Mobile apps and modern web solutions – the right front end for the back end you already have, on every screen.
Find out more →
Data, analytics & AI
Putting your data to work: from analysis and reporting to AI-supported features that fit into the way you already work.
Find out more →Personal, experienced, dependable.
You speak directly to the people who build your software – short paths instead of friction.
Winfried Schöttler
Managing Director and developer
Straight to the developers
No sales layer: you talk to the specialists who do the work. That saves time and misunderstandings.
More than 30 years of experience
Know-how built up in integration, back-end and mobile solutions – across many industries and up to date with current technology.
On time and on budget
Dependable planning and clear responsibility. We keep what we promise.
Focus instead of volume
A small core team with an established network of experienced specialists, concentrating on selected projects – with our full attention.
Built to be used
Software people are happy to work with: considered in the detail, clear to operate.
Experience as a product owner
With CalcTape we run a product of our own – we know what keeps software maintainable over the long term.
Three decades on, with many long-standing client relationships.
For more than 30 years we have delivered projects for companies from mid-sized businesses to large corporations – in industry and mechanical engineering, in logistics and retail, and in the public sector and for associations.
Trust is built on dependability: many companies have worked with us for years. We are happy to name relevant references on request – specific to your industry or your task.
CalcTape – arithmetic you can retrace.
With CalcTape we develop and maintain software of our own: a calculator that replaces mental arithmetic and scribbled notes on screen, used every day around the world. Having our own product keeps us close to what makes software good – quality your projects benefit from too.
Let us talk about what you have in mind.
A new application, an interface or a mobile solution – tell us about your requirement, with no obligation. We reply personally, usually within one working day.