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

Deine Aufgaben bei uns könnten so aussehen

  • Du unterstützt unser Team und unsere Kunden bei der agilen Softwareentwicklung, bei der jeder im Team seine Ideen, Konzepte und sein Feedback einbringt
  • Du übernimmst Mitverantwortung für den Erfolg des Teams bei der Entwicklung geschäftskritischer, kundenspezifischer Softwarelösungen in verschiedenen Business Umgebungen
  • TDD, Pair-Programming, Code-Reviews, Knowledge-Sharing, Craftsmanship, CI & CD begegnen Dir in Deiner täglichen Arbeit
  • Entwicklung im Backend u.a. mit Java, Kotlin, Spring Boot, Spring Cloud, Hibernate/JPA, REST, Gradle, Jenkins/GitLab, Docker, Kubernetes, JUnit etc. und/oder im Frontend mit TypeScript, React, Angular, Selenium/Playwright/Cypress, Jenkins/GitLab etc. – Du musst aber nicht in allen Bereichen Experte sein

Wir fänden es toll, wenn Du folgende Voraussetzungen mitbringst

  • Du hast mehrjährige Erfahrung in der (agilen) Softwareentwicklung
  • Clean Code und Software-Craftsmanship sind keine Fremdworte für Dich
  • Du schreibst Tests genauso gerne wie produktiven Code und refactorst gern
  • Teamplayer und selbstständiges Arbeiten sind keine Gegensätze für Dich
  • Du hast ein fachbezogenes Studium mit Erfolg abgeschlossen
  • Deutsch und Englisch gehen Dir fließend über Finger und Zunge

… dann wollen wir Dich kennenlernen!


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 & 30 days vacation

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 located at the Bonner Bogen

It's easy to feel comfortable in our modern, sunny and well-located office. You can play a round at the arcade machine or football table at any time, 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. Otherwise, food trucks, bakeries and canteens are not far away.

Relocation costs

If you choose cronn but have to move to be closer to us, we’ll help you with the costs of relocating. For an easier start in your new home in Bonn.​​


The cronn-bike gives cronners the option to leave the car at home, simultaneously reducing emissions and helping you lead a healthy lifestyle.


In Bonn and Hamburg, we offer the Deutschlandticket for all those who would like to reach our easily accessible offices by public transport.

Meal subsidy

We offer you the maximum food subsidy for your lunch in the offices of Bonn & Hamburg.

Sabbatical model

You want to take a longer break from your everyday working life? With our sabbatical model we will find a solution together (at the earliest after the probationary period).


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