We are cronn and development of customised software is our passion. Our goal: our customers' success. We rely on Java, open-source technology and, last but not least, the expertise of our energetic team of over 150 cronners at our locations in Bonn, Hamburg and Białystok (PL). No matter if you are an industry giant, a medium-sized company, or a start-up: we will lead your project to the finish line – and beyond! – as your long-term partner in digitalization, innovation, and disruptive innovation.
Contact us nowThe advantages of bespoke software
- Fits your processes perfectly
- Allows for changes to be implemented quickly and on demand
- Full cost control: No license fees and unnecessary features
- Always up to date with the latest data security developments
- Scalable whenever necessary
- Long-term partnership directly with the manufacturer – no intermediaries

Why should you choose bespoke software development?
Efficient software solutions must be tailored to your needs and that is exactly what we offer: custom-made software which integrates seamlessly into your business processes. This is how you gain a competitive edge!
We develop your software solutions quickly and efficiently with strong focus on code quality and agile processes. In doing so, we maintain the highest quality standards. Whether you need a complex business application, an intuitive mobile app, or a scalable web platform, our team of experienced developers is ready to turn your vision into reality.
Your tailor-made solution
cronn has experience in designing and developing mission-critical software for various industries and partners.
Applications
Mobile Apps
AI Solutions
Middleware
Flexible pricing models
Be it a contracted fixed price, agile fixed price or billing based on working hours – we will work with you to find the right pricing model for you and your project. We would be happy to provide an outline specific to your needs in a free initial consultation.
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Our expertise
Frontend
User interfaces with excellent usability and user experience
Backend
Secure, reliable backends written in clean code
Databases
Development and migration of relational and non-relational databases
Cloud
Scalable and available applications and data
DevOps
Continuous delivery of changes – automatically tested
Artificial intelligence
Integration of the latest technologies in the field of artificial intelligence
Agile development: Customer integration through communication

- Flexibility
Agile development quickly adapts to changing needs. - Continuous feedback
Your feedback is continuously incorporated to optimize the product. - Transparent communication
Open updates allow you to follow your project's progress. - Fast time to market
Iterative deliveries accelerate your solution's journey to market.
We gladly answer your questions!


Our success rate
Satisfied customers
Successfully realised projects
Our tools


Java
The programming language which is the standard for high-performing and stable backends.
Spring
Has integrated dependency injection in the Java enterprise environment and makes Java programming faster, easier and more secure.
React
An efficient and flexible framework to build high-performance interactive web interfaces.
Hibernate
Object-oriented programming and relational databases? No problem with this ORM framework.
Gradle
The best Java build tool. Fastest feedback thanks to incremental and parallel builds. Essential for continuous integration.
Docker
Rapid deployment of applications in any environment. Creates containers which hold everything the application needs to run.
Playwright
Framework that enables End2End testing for web applications for any browser and platform in a single API.
Figma
Web-based tool for creating UI designs and high-fidelity prototypes.
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We are here for you!
Frequently asked questions about custom software
Custom software is developed specifically for your unique business processes and requirements. Unlike standard software, which often requires compromises, custom software is a perfect fit with maximum efficiency and the flexibility to adapt to changing business needs.
While the initial cost of custom software may be higher, it offers better value for money in the long run. Customized solutions can be tailored to your exact needs, helping avoid license fees for unused features and reducing the need for costly adjustments later down the line.
The cost of custom software development varies widely and depends on multiple factors, such as the complexity of the project or specific requirements and features. We would gladly discuss your requirements, provide a cost estimate and find the right pricing model for your project: fixed price (work contract), agile fixed price or billing based on working hours. And the first consultation is on us! .
We start the development process with a thorough analysis of your requirements in order to fully understand your needs and goals. During development, we rely on regular meetings and feedback from you to ensure that the final product fully meets your expectations.
In one word: Yes! We ensure seamless integration with your existing systems and workflows while adding necessary solutions to your ecosystem.