aeris modernises your software system either via technical improvement of individual components or via the porting of complete systems to a new technological platform with equivalent functionality.

Replacement of legacy software

IT systems often grow over decades. Numerous or larger functional adaptations can reduce the quality of software during this growth process. Furthermore, it is unavoidable that the software ages over a longer time period. aeris is often taken on board when legacy-applications critical for the business need to be replaced through state-of-the-art technologies. What are the main reasons for the changeover?
Components of a platform are no longer available.
Mapping adaptations to changed framework conditions (e.g. new legal requirements) with the legacy software becomes challenging.
The company’s own development team needs to be widened; however finding someone fluent in old programming languages is no longer possible.
Software vendors no longer support the necessary tools and old platforms anymore.
Meeting the current demands of the market (e.g. low IT costs and high flexibility relating to product and process) is more difficult.
The proliferation of mobile devices creates opportunities for a multitude of new business models that the legacy application does not adequately support.
High running costs and security and maintenance problems with hardware and software

To the advantage of your business model

The technical advantages of a changeover are obvious. The complex and heterogeneous software environment is replaced by stable and automatically tested software. Legacies and no longer used functionalities are cleaned and your systems are clearer. Additionally, aeris provides a maintainable and well documented software architecture with modular systems that enables, among other things, the use of your on-premise cloud-infrastructure. The new development minimises the risk of a single point of failure – which is a decisive advantage!

The economic aspect

Giving up a legacy software also reduces costs. Furthermore, modern technologies speed up the data transfers, allowing you to design your core business processes more efficiently.


Refactoring is the manual or automated improvement of the structure of applications whilst maintaining the observable behaviour of the programme. This is necessary when:
projects, which use outdated technologies or contain components with old programming codes, are further developed
the quality of application systems within the usual software maintenance automatically deteriorates; however maintenance costs continue to rise exponentially
parts of an application or the whole software architecture need to be adapted to a changed environment or new framework conditions.
lifetime and upgradeability need to be optimised
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Refactoring improves the following characteristics of the source code as well as the application:

Legibility and understandability:

aeris writes clear code according to current guidelines – so that your IT team understands the code better

Modularity and redundancy:

The setup of completed functional software pieces allows a simpler usage of program components from other areas. aeris ensures that functional comparable code blocks are not implemented multiple times.

Coupling and cohesion:

aeris values loose coupling and strong cohesion – meaning that future changes only have local effects.


aeris’ implemented regression tests ensure that the application behaviour has not changed and that no errors are introduced during the refactoring.
These improvements optimise the upgradability and reduce the effort for functional enhancement significantly. New features and bug fixes can be implemented quicker and more securely. The newly achieved clarity decreases the proportion of bugs and existing issues become evident as the code is understood. The clear code makes it easier for every member of your IT-team – whether new or old – to become familiar with it. The elimination of redundant functions, the increase in adjustability as well as the implementation of consistent programming guidelines contribute to the reduction of routine maintenance costs and the rise in profitability of your software systems.

Why aeris?

aeris thinks strategically, technologically and economically from the beginning. We draw on solid knowledge in consulting and experience from successful projects. For us it is self-evident to analyse the source code in detail for performance and quality and to measure improvements before and after refactoring. You therefore know exactly where you stand.

We value automated replicable tests as well as the approach of model-driven development. Our experts have great experience with tools and integrated development environments. We pass on our know-how in a targeted way. This ensures that your internal IT is aligned perfectly to your business and your employees according to current standards.