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Rieger Systems GmbH logoRieger Systems GmbH

Software that holds up in daily use

Rieger Systems develops custom software and takes over existing systems. We turn grown solutions and unfinished AI prototypes into applications that run reliably and stay maintainable.

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When this pays off

  • The former developer has left and nobody understands the system any more.
  • A quickly built AI prototype works in the demo, but not in daily use.
  • Every change breaks something somewhere else.

What we take on

We work out with you which path will hold before we commit.

  • New development

    Applications, portals and interfaces from architecture to operation.

  • Takeover

    We take over existing software, secure operation and lay the basis for further development.

  • Prototype rescue

    We clean up unfinished AI prototypes, fix critical faults and bring them into production.

  • Interfaces

    We connect your systems so data only has to be entered once.

  • Tests and quality

    Automated tests and traceable reviews keep changes plannable.

  • Documentation and handover

    Operating guides and readable code that another team can take over.

Worked example

A wholesaler with grown ordering software

Situation
A program from ten years of manual work carries all orders. It fails regularly and changes take weeks.
Approach
Secure the critical paths, add automated tests, move operation to Linux, then renew features step by step.
Result
The system keeps running calmly and new requests are done in days rather than weeks.
See all examples

  • Outages per month

    Before
    6
    After
    0 to 1

  • Time to a change

    Before
    6 weeks
    After
    1 week

  • Code covered by automated tests

    Before
    0 %
    After
    70 %

Worked example with assumed values, not a customer project. We work through your numbers in the conversation.

How it works

  1. 1

    Assess

    Goal, existing assets and risks. With existing software we read the code first.

  2. 2

    Stabilise

    Secure critical paths before new features arrive.

  3. 3

    Extend

    Features in short steps, with visible interim results.

  4. 4

    Hand over

    Documentation, operation and ongoing maintenance if you wish.

Frequently asked questions

Which rights do we get to the software?

Usage rights and the handover of the source code are set in the offer. The software should be able to run on without us.

Do you take over other people's code?

Yes. We read it, name the risks and say honestly whether repairing or rebuilding makes more sense.

What do you need from us?

A contact for subject questions, access to test systems and existing documentation, and a shared task list.

How is the work billed?

Against a binding offer per phase. The scope changes only by agreement.

Goes well with

Decide between new build and takeover

We tell you which entry point holds and agree a first step.

Start a conversation+43 677 18037465

Personal care, no call centre. We usually reply within 1 to 2 working days.