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About

we are cronn_

Our heart beats for software craftsmanship, our clients, and our team! Since 2013, we've successfully implemented software projects in Bonn, Hamburg, and Białystok (PL). Always with us: Java, open-source technologies, and agility. Customer focus and quality are very important to us—and, of course, the joy of working together.

Our methods

Agile

Requirements often change in the course of a project! Thanks to our agile methods we are prepared for this. Continuous adaptation to new requirements allows us to react quickly to changes, always offering our customers the best solution. This speeds up software development and reduces costs.

Testdriven

Software testing tells no lies, provides security in the event of changes and is the basis for continuous integration. A good test base increases the quality of the code as well as the end product and saves effort in debugging, refactoring, and maintenance. This enables faster and higher-quality development cycles. And our developers have more time to devote to the essentials: good code!

Continuous

The status and quality of a software project requires constant checks, which results in many repetitive tasks. Manually, this could quickly become painful. That is why we rely on a smooth, automated connection between development, version management, testing and deployment to production.

Clean code

Programming languages were invented to write software in a manner intelligible to humans, then use it to solve complex problems. Therefore, source code should remain understandable. That is why we write clean code that is easy to read, understand, and maintain.

Some words by our CEO

Picture of Jobst Eßmeyer

Good code with good people - that's why I founded cronn. cronn is more than just a software company for me. It is a place where the joy of good code is the focus. Both for our team, which develops it, and for the customer, who uses the software in the end.

Jobst Eßmeyer CEO of cronn

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.

Docker

Rapid deployment of applications in any environment. Creates containers which hold everything the application needs to run.

Gradle

The best Java build tool. Fastest feedback thanks to incremental and parallel builds. Essential for continuous integration.

Playwright

Framework that enables End2End testing for web applications for any browser and platform in a single API.

Hibernate

Object-oriented programming and relational databases? No problem with this ORM framework.

Figma

Web-based tool for creating UI designs and high-fidelity prototypes.

We are for Open Source

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Our partners

Digital Hub

Short Description Digital Hub.

Cyber Security Cluster Bonn

Short Description Cyber Security Cluster Bonn.

GATE

Short Description GATE.

AHK

Short Description AHK.

DOAG

Short Description DOAG.

Gesundheitsregion KölnBonn

Short Description Gesundheitsregion KölnBonn.

BVMW

Short Description BVMW.

Women in Tech

Short Description Women in Tech.

Logistik-Initiative Hamburg

Short Description Logistik Initiative Hamburg.