01
Custom software and web platforms
Applications you cannot buy ready-made: portals, customer areas, internal tools, multilingual platforms. Built around how you work, not the other way round.
IT services from Germany
Software that reaches production — and stays there.
We build custom applications, put them into production and keep maintaining them. There is no handover point at which the problem suddenly becomes yours.
Discuss a project
Process
From the idea to running software
Five steps, and after each one you hold something real — not a progress report you have to take on faith. Pick a step.
Services
What we take on
02
Mobile applications
Apps for iOS and Android from a single codebase, including store submission and the paperwork the review processes ask for.
03
Cloud, infrastructure, operations
Servers, containers, databases, backups, monitoring. Set up reproducibly, so an outage stays a restore instead of turning into an excavation.
04
Integration and data pipelines
For when two systems refuse to talk: interfaces, import and export routes, data models, reporting. Including when the other side is old.
05
AI inside the product
Language models where they measurably take work away: classification, search, text work, assistance. With clear limits and a result you can check.
06
Modernisation
Replacing grown systems step by step without stopping the business. Make it safe and measurable first, rebuild second.
How we work
Six things we hold to
Small teams, senior peopleNo chain of intermediate layers. Whoever talks to you writes the code or answers for it directly.
Everything belongs to youSource code, infrastructure, credentials and documentation are yours from day one. Changing supplier must never be a threat.
In writing before it is builtScope, assumptions and explicit non-goals are on paper before the first commit. That is where the expensive misunderstandings die.
Operated in the EUServers and data stay inside the European legal area, processed under European data protection law.
One channel, named peopleNo ticket maze. Agreed response times and a status report you can read in two minutes.
We stay after launchA project does not end at handover. Maintenance, updates and further development are part of the offer, not the surcharge on it.
Engagement
Three ways to work with us
Project
Fixed scope, fixed order of work, an agreed price range. Fits when the goal can be described clearly and will not reinvent itself along the way.
Billed per milestoneTeam
A dedicated team works on your product for an agreed period. Fits when requirements sharpen while you build.
Billed per periodOperations and maintenance
Taking over an existing system — including one somebody else built: upkeep, updates, standby, further development.
Billed as agreed
Contact
Tell us where it hurts
One sentence about the plan is enough to start. We answer with questions, not with a price list.
Write directly
hello@poulgrenz.comEven better: a short description of the system in question and what hurts about it today. Please send attachments only after the first reply — otherwise the mailbox takes them in unchecked.