we are cronn

We are cronn – a Bonn-based software development company with branches in Hamburg and Białystok, Poland. Software development is our passion. We trust in Java, OpenSource and, last but not least, in our experienced team. All of this we deploy to bring our clients software that is key to their business, or to professionally consult them in issues regarding architecture, tools or approaches.

cronn locations marked on mapThe three cronn office locations - Bonn, Hamburg and Białystok - marked on a map

What tasks await you

  • Designing, implementing and introducing software for companies
  • Taking over project management from teams of developers
  • Understanding and analysing our clients' requirements, and translating them into software
  • Be the point of contact for customers and members of your team
  • Take responsibility for customer acquisition and turnover
  • Participation in agile project teams
  • Knowledge-Sharing, Craftsmanship, Continuous Improvement
  • Think outside of the box


  • You have at least two years of experience as a Technical Lead in the Java field
  • or are confident that your experience as a Java developer would allow you to take up the part
  • You are fluent in speech and writing in English
  • You can confidently make decisions regarding architecture and design
  • and can convince your team and clients of your choices
  • You are readily take up responsibilities
  • and are chomping at the bit to get things done
  • You consider yourself up-to-date with the latest technologies
  • but you're not too obsessed with technology

… then we want to get to know you!

When, on top of this, you can boast solid experience with a few of the following tools and technologies

  • Spring (Boot/Cloud), Hibernate/JPA, Liquibase
  • JavaScript, ReactJS, TypeScript, Webpack, JQuery
  • Gradle, Git, SonarQube, Jenkins
  • JUnit, AssertJ, Mockito, Testcontainers, Cucumber, Selenium
  • MariaDB, Oracle, PostgreSQL, MongoDB
  • Docker, Ansible
  • Amazon Web Services, Microsoft Azure, Google Cloud
  • Machine-Learning, Neural Networks, Artificial Intelligence
  • Microservices, Micro-Frontends
  • Reactive Programming

… then we absolutely must get to know you!


Apply now!

Does this job offer suit you?
Then we look forward to receiving your application by e-mail: jobs@cronn.de

Apply now Our benefits

Our benefits

Work at cronn

Our teams and our abilities

Our catchphrase is „wir entwicklen software“ – developing software brings us joy. We believe in Software Craftsmanship, good code and score with a team that brings both competence and a healthy attitude to the table.​

Interesting and challenging software development projects

Our projects are laid out within in a wide scope of fields. We show the same enthusiasm for start-ups as we do for multinational corporations. We embrace challenges and believe in development and growth.

Hardware and operating system according to your preferences

Because you know best what you like to work with. On top of that all of our work stations are equipped with height-adjustable tables and ergonomic chairs.​

Further training opportunities

We encourage personal growth with a yearly further education budget and two days exceptional leave for you to use on conferences, workshops or certifications – alone, with a colleague or with the whole team.​

Flexible working hours

We want cronners to find their best possible work-life balance: that’s why we have flexible working hours and home office days.

Employee events

No later than at your first Christmas party you’ll get to witness how much we enjoy celebrating together. However, until then there are many other events held throughout the year: beer tastings, summer parties, runs, short trips, cronn sports clubs or our weekly afternoon beer. Open – but not obligatory! – for all.​

Participation in conferences and engagement

We love to share our knowledge and actively participate in local communities such as the Java User Group or the Usability Testessen. You are welcome to influence and shape this network.​

A cool office

It’s easy to feel comfortable in our modern, sunny and well-located office. We have good tea and coffee (really good!) and unlimited soft drinks. We also make sure there’s always something to nibble on, be it sweet, salty or healthy.​


Questions regarding you application?
Stefan will be glad to answer them all:

  +49 228 710 310 36

Unsolicited application

No fit? No problem

Haven’t found a job offer that exactly fits your profile? Don’t worry – we welcome unsolicited applications.

Send in you application now