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cronn

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"wir entwickeln software" - our slogan may sound simple, but it stands for everything that makes a cronner. Above all we deliver exceptional and carefully tested software, so that our clients can concentrate on achieving their own success - no worries, no doubts.

Continually delivering such high quality requires a team of passionate cronners who are constantly developing their skills, have the client’s best interest at heart and who keep their eye on new technologies and tools. Of course, not everyone is a wizard at everything - we’re also just human - which is why we organise in teams, which allow us to even out any weaknesses and accumulate our strengths.

Have you found yourself in our values and want to become a cronner? Have a look at our job openings and see if you find something that fits!

Bonn Hamburg Białystok

We are searching in Bonn

Your tasks:

  • Participation in agile project teams and joint responsibility for the success of the team
  • Development of business-critical, customer-specific software solutions
  • TDD, Pair Programming, Code Reviews
  • Knowledge Sharing, Craftsmanship, Continuous Improvement
  • Development with different technologies (for example Java 8 and up, JavaScript, TypeScript, Swift, Kotlin, Spring Boot, React, Gradle, Jenkins, Git, AWS, Docker, Kubernetes, JUnit, Selenium, Cucumber)
  • Thinking outside of the box and working on your own personal development

If you have the following qualifications:

  • Extensive experience in server/backend development and/or frontend/web development
  • Completed studies own the field of computer science, business informatics and/or sufficient experience as a software engineer
  • Very good understanding of (and fun with) modern stacks
  • Clean Code and Software Craftsmanship are no foreign words for you
  • You are fluent in German and English in speaking as well as in writing
  • As a team player, you enjoy working independently and on your own responsibility
  • You like writing tests as much as productive code and you like refactoring

… then we want to get to know you.

We may convince you to join us with:

  • Our teams and our abilities
  • Interesting and challenging software development projects
  • Hardware and operating system according to your preferences
  • An annual training budget and 2 days special leave for personal education
  • Career opportunity to develop yourself and become a Tech Lead
  • Flexible working hours, 30 days vacation and home office days
  • A cool office located at the „Bonner Bogen“
  • Job Ticket in Bonn
  • Employee events
  • Participation in conferences and engagement in the Java community
  • Equal opportunities and diversity within the staff

… and not least with an attractive employment contract.


Too good to be true? Send us an email to and find out for yourself!

Your tasks:

  • You will support our team and our customers in agile software development, where everyone in the team contributes their ideas, concepts and feedback
  • You will take joint responsibility for the success of the team in developing business-critical, customer-specific software solutions in various business environments
  • You may be required to use TDD, Pair programming, code reviews, knowledge sharing, craftsmanship, CI & CD in your daily work
  • You may be required to develop with Kotlin, Java, Spring (Boot/Cloud), Hibernate/JPA, REST, Gradle, Jenkins, Git and other technologies (for example: AWS, Docker, Kubernetes, JUnit, MariaDB, Oracle, PostgreSQL, MongoDB) - but you do not have to be an expert in all areas

If you have the following qualifications:

  • You have many years of experience in (agile) software development with Java and in REST-API design
  • You love to keep your tech knowledge up-to-date and you enjoy sharing it
  • Clean Code and software craftsmanship are no foreign words for you
  • You are fluent in German and English in speaking as well as in writing
  • You are a team player, yet you can also work independently
  • You like writing tests as much as productive code and you enjoy refactoring
  • You have a strong “You build it, you run it” attitude

… then we want to get to know you.

We may convince you to join us with:

  • Our teams and our abilities
  • Interesting and challenging software development projects
  • Career opportunity to develop yourself and become a Tech Lead
  • Hardware and operating system according to your preferences
  • An annual training budget and 2 days special leave for personal education
  • Flexible working hours, 30 days vacation and home office days
  • A cool office located at the „Bonner Bogen“
  • cronn bike, employee events and other "goodies“
  • Participation in conferences and engagement in the Java community
  • Equal opportunities and diversity within the staff

… and not least with an attractive employment contract.


Too good to be true? Send us an email to and find out for yourself!

Your tasks:

  • You will support our team and our customers in agile software development, where everyone in the team contributes their ideas, concepts and feedback
  • You will take joint responsibility for the success of the team in developing business-critical, customer-specific software solutions in various business environments
  • You may be required to use TDD, Pair programming, code reviews, knowledge sharing, craftsmanship, CI & CD in your daily work
  • You may be required to develop with JavaScript/TypeScript, React, Angular, Mocha/Jest/QUnit, Cucumber, Selenium, Git, SonarQube, Jenkins, Mobile-First- und Offline-First-Design - but you do not have to be an expert in all areas

If you have the following qualifications:

  • You have many years of experience in (agile) software development with TypeScript / JavaScript, React and Angular
  • You love to keep your tech knowledge up-to-date and you enjoy sharing it
  • Clean Code and software craftsmanship are no foreign words for you
  • You are fluent in German and English in speaking as well as in writing
  • You are a team player, yet you can also work independently
  • You like writing tests as much as productive code and you enjoy refactoring
  • You have a strong “You build it, you run it” attitude

… then we want to get to know you.

We may convince you to join us with:

  • Our teams and our abilities
  • Interesting and challenging software development projects
  • Career opportunity to develop yourself and become a Tech Lead
  • Hardware and operating system according to your preferences
  • An annual training budget and 2 days special leave for personal education
  • Flexible working hours, 30 days vacation and home office days
  • A cool office located at the „Bonner Bogen“
  • cronn bike, employee events and other "goodies“
  • Participation in conferences and engagement in the Java community
  • Equal opportunities and diversity within the staff

… and not least with an attractive employment contract.


Too good to be true? Send us an email to and find out for yourself!

If:

  • You have at least 2 years of relevant work experience in Java Software Development or at least 1 year relevant work experience in DevOps / Systems Engineering
  • Continuous Delivery and Enterprise Integration are no foreign words for you
  • You like to deal with complex systems and like to advance automation thinking
  • German and English are fluent over your fingers and tongue
  • You like to work agile and get to the bottom of problems
  • You work independently and on your own responsibility
  • You develop your own tools for support, not just awk
  • You think and act customer-oriented
  • You like to communicate with peolpe

… then we want to get to know you.

If, on top of this, you can boast solid experience with a few of the following tools:

  • Linux, Shell Prgramming
  • Gradle, SonarQube, Jenkins
  • MySQL, PostgreSQL
  • Jira, Git
  • Docker, Ansible, Kubernetes
  • Amazon Web Services, Microsoft Azure, Google Cloud
  • Microservices
  • Liquibase

… then we absolutely must get to know you!

We may convince you to join us with:

  • Our teams, great colleagues and our abilities
  • Interesting and challenging software development projects
  • Hardware and equipment according to your preferences
  • Freedom to operate and responsibility to take over
  • Flexible working hours, 30 days of vacation and home office days
  • A cool office located at „Bonner Bogen“
  • Job ticket
  • Employee events
  • Participation in conferences and engagement in the Java community
  • Equal opportunities and diversity within the staff

… and not least with an attractive employment contract.

Your tasks are:

  • Take care of business software in test and production environments at regular business hours
  • Search, find and, if possible, eliminate causes of errors (usually 3rd level support)
  • Being the contact person for partner systems
  • Operation of incident management tools and processes

Too good to be true? Send us an email to and find out for yourself!

Your tasks:

  • You would represent cronn on-site with the customer
  • You develop software according to technical specifications, preferably with an agile approach
  • You will take joint responsibility for the success of the team in developing business-critical, customer-specific software solutions in various business environments
  • You look beyond your current project and can recognize future opportunities for cronn
  • You promote principles such as TDD, pair programming, code reviews, knowledge sharing, craftsmanship, CI & CD in customer projects
  • Development with Java, Kotlin, Spring (Boot/Cloud), TypeScript, JavaScript, React, Angular, Hibernate/JPA, REST, Gradle, Jenkins, Git and other technologies (for example: AWS, Docker, Kubernetes, JUnit, MariaDB, Oracle, PostgreSQL, MongoDB) - but you do not have to be an expert in all areas

If you have the following qualifications:

  • Confidence and good presentation skills
  • You care about customer satisfaction
  • You have several years of experience in (agile) software development in the field of Open Source
  • You want to stay technically up-to-date and you enjoy sharing this knowledge
  • Clean Code and Software-Craftsmanship are no foreign words for you
  • You are fluent in German and English in speaking as well as in writing
  • You like writing tests as much as productive code and you enjoy refactoring
  • You have a strong “You build it, you run it” attitude
  • You are a team player, yet you can also work independently

… then we want to get to know you.

We may convince you to join us with:

  • Our teams and our abilities
  • Interesting and challenging software development projects
  • Hardware and operating system according to your preferences
  • An annual training budget and 2 days special leave for personal education
  • Flexible working hours, 30 days vacation and home office days
  • A cool office located at the „Bonner Bogen“
  • Company car, cronn bike, employee events and other "goodies“
  • Participation in conferences and engagement in the Java community
  • Equal opportunities and diversity within the staff

… and not least with an attractive employment contract.


Too good to be true? Send us an email to and find out for yourself!

If:

  • You enjoy the analysis of complex systems and have proven it in your previous jobs
  • You are fluent in German as well as in English
  • You work independently and at your own responsibility
  • You like to communicate with people and are good at putting your results down in writing
  • You have a better-than-average university degree in computer science, mechanical engineering, electrical engineering or as natural scientist ( e.g. in mathematics, physics, chemistry) - with or without a doctorate
  • You are well-organised and never lose sight of your goal…

…then we want to get to know you.

If you also have some experience with the following tools and technologies:

  • Java, Object Orientation and UML
  • DITA, Docbook, LaTeX or Markdown languages
  • Relational databases and SQL
  • Eclipse, Git
  • JEE or Spring
  • Linux

… then we really want to get to know you

We are certain we can convince you to work with us by providing:

  • A broad, varied and developing area of responsibility
  • Interesting and challenging software development projects
  • A very good working atmosphere and employee events
  • Annual training budget and 2 days special leave p.a. for further training
  • Flexible working hours and 30 days holiday p.a.
  • Home office days
  • A cool office at the Bonner Bogen
  • A job ticket in Bonn
  • Opportunities to take part in conferences and engage with the community
  • Equal opportunities and diversity within the workforce

… and last but not least with an appealing contract.

Your tasks:

  • Analysis of business-related tasks and IT system analysis
  • Collection and analysis of requirements
  • Creation of specifications / interface specifications
  • Test development
  • Communicating with the customer.

Too good to be true? Send us an email to and find out for yourself!

If:

  • You have at least two years relevant job experience in IT enterprise support
  • You don’t consider continuous delivery and enterprise integration to be alien terms
  • You enjoy working with complex systems
  • You can fluently speak and write German and English
  • You enjoy getting to the bottom of problems
  • You are independent and responsible
  • You develop your own tools to provide better support
  • and not only in awk, for that matter
  • You work and think in a client-oriented manner
  • You are a people’s person

… 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:

  • Linux, Shell Programming
  • Jenkins, Gradle
  • MySQL, PostgreSQL
  • Jira, Git
  • SonarQube, Jenkins
  • Docker, Puppet, Vagrant
  • Liquibase

… then we absolutely must get to know you!

We are certain we can convince you to work with us by providing:

  • An experienced and skilled team
  • Interesting and challenging software development projects
  • Flexible working hours and Home Office days
  • Hardware and tools to match your expectations
  • A company car, a company phone and a job ticket
  • Opportunities to take part in conferences and engage with the Java community

… and, last but not least, an appealing contract.

Your responsibilities would include:

  • Maintenance of company software in a test and production environment within regular business hours
  • Getting to the root of problems - and solving them, where possible
  • Being a point of contact for partner systems
  • Servicing of incident management tools and processes

Too good to be true? Send us an email to and find out for yourself!

We are searching in Hamburg

Your tasks:

  • You will support our team and our customers in agile software development, where everyone in the team contributes their ideas, concepts and feedback
  • You will take joint responsibility for the success of the team in developing business-critical, customer-specific software solutions in various business environments
  • You may be required to use TDD, Pair programming, code reviews, knowledge sharing, craftsmanship, CI & CD in your daily work
  • You may be required to develop with Kotlin, Java, Spring (Boot/Cloud), Hibernate/JPA, REST, Gradle, Jenkins, Git and other technologies (for example: AWS, Docker, Kubernetes, JUnit, MariaDB, Oracle, PostgreSQL, MongoDB) - but you do not have to be an expert in all areas

If you have the following qualifications:

  • You have many years of experience in (agile) software development with Java and in REST-API design
  • You love to keep your tech knowledge up-to-date and you enjoy sharing it
  • Clean Code and software craftsmanship are no foreign words for you
  • You are fluent in German and English in speaking as well as in writing
  • You are a team player, yet you can also work independently
  • You like writing tests as much as productive code and you enjoy refactoring
  • You have a strong “You build it, you run it” attitude

… then we want to get to know you.

We may convince you to join us with:

  • Our teams and our abilities
  • Interesting and challenging software development projects
  • Career opportunity to develop yourself and become a Tech Lead
  • Hardware and operating system according to your preferences
  • An annual training budget and 2 days special leave for personal education
  • Flexible working hours, 30 days vacation and home office days
  • A cool office located in downtown Hamburg
  • cronn bike, employee events and other "goodies“
  • Participation in conferences and engagement in the Java community
  • Equal opportunities and diversity within the staff

… and not least with an attractive employment contract.


Too good to be true? Send us an email to and find out for yourself!

Your tasks:

  • You will support our team and our customers in agile software development, where everyone in the team contributes their ideas, concepts and feedback
  • You will take joint responsibility for the success of the team in developing business-critical, customer-specific software solutions in various business environments
  • You may be required to use TDD, Pair programming, code reviews, knowledge sharing, craftsmanship, CI & CD in your daily work
  • You may be required to develop with JavaScript/TypeScript, React, Angular, Mocha/Jest/QUnit, Cucumber, Selenium, Git, SonarQube, Jenkins, Mobile-First- und Offline-First-Design - but you do not have to be an expert in all areas

If you have the following qualifications:

  • You have many years of experience in (agile) software development with TypeScript / JavaScript, React and Angular
  • You love to keep your tech knowledge up-to-date and you enjoy sharing it
  • Clean Code and software craftsmanship are no foreign words for you
  • You are fluent in German and English in speaking as well as in writing
  • You are a team player, yet you can also work independently
  • You like writing tests as much as productive code and you enjoy refactoring
  • You have a strong “You build it, you run it” attitude

… then we want to get to know you.

We may convince you to join us with:

  • Our teams and our abilities
  • Interesting and challenging software development projects
  • Career opportunity to develop yourself and become a Tech Lead
  • Hardware and operating system according to your preferences
  • An annual training budget and 2 days special leave for personal education
  • Flexible working hours, 30 days vacation and home office days
  • A cool office located in downtown Hamburg
  • cronn bike, employee events and other "goodies“
  • Participation in conferences and engagement in the Java community
  • Equal opportunities and diversity within the staff

… and not least with an attractive employment contract.


Too good to be true? Send us an email to and find out for yourself!

Your tasks:

  • You would represent cronn on-site with the customer
  • You develop software according to technical specifications, preferably with an agile approach
  • You will take joint responsibility for the success of the team in developing business-critical, customer-specific software solutions in various business environments
  • You look beyond your current project and can recognize future opportunities for cronn
  • You promote principles such as TDD, pair programming, code reviews, knowledge sharing, craftsmanship, CI & CD in customer projects
  • Development with Java, Kotlin, Spring (Boot/Cloud), TypeScript, JavaScript, React, Angular, Hibernate/JPA, REST, Gradle, Jenkins, Git and other technologies (for example: AWS, Docker, Kubernetes, JUnit, MariaDB, Oracle, PostgreSQL, MongoDB) - but you do not have to be an expert in all areas

If you have the following qualifications:

  • Confidence and good presentation skills
  • You care about customer satisfaction
  • You have several years of experience in (agile) software development in the field of Open Source
  • You want to stay technically up-to-date and you enjoy sharing this knowledge
  • Clean Code and Software-Craftsmanship are no foreign words for you
  • You are fluent in German and English in speaking as well as in writing
  • You like writing tests as much as productive code and you enjoy refactoring
  • You have a strong “You build it, you run it” attitude
  • You are a team player, yet you can also work independently

… then we want to get to know you.

We may convince you to join us with:

  • Our teams and our abilities
  • Interesting and challenging software development projects
  • Hardware and operating system according to your preferences
  • An annual training budget and 2 days special leave for personal education
  • Flexible working hours, 30 days vacation and home office days
  • A cool office located in downtown Hamburg
  • Company car, cronn bike, employee events and other "goodies“
  • Participation in conferences and engagement in the Java community
  • Equal opportunities and diversity within the staff

… and not least with an attractive employment contract.


Too good to be true? Send us an email to and find out for yourself!

We are searching in Białystok

If:

  • 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)
  • JAX-WS und JAX-RS
  • ReactJS, TypeScript, Webpack
  • Gradle, Git, SonarQube, Jenkins
  • JUnit, Cucumber, Selenium, testcontainers
  • MariaDB, Oracle, PostgreSQL, MongoDB
  • Docker, Puppet, Vagrant, Ansible
  • Amazon Web Services
  • Microservices, Micro Frontends

… then we absolutely must get to know you!

We are certain we can convince you to work with us by providing:

  • An experienced and skilled team
  • Interesting and challenging software development projects
  • Flexible working hours and Home Office days
  • Hardware and tools to match your expectations
  • Opportunities to take part in conferences and engage with the Java community

… and, last but not least, an appealing contract.

Your responsibilities would include:

  • 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

Too good to be true? Send us an email to and find out for yourself!

If:

  • Quality, agility, open-mindedness and passion describe your working style
  • Clean Code and Software Craftsmanship are no foreign words for you
  • You are always looking for improvement
  • You are fluent in English in speaking as well as in writing
  • As a team player, you enjoy working independently and on your own responsibility
  • You love writing tests as much as productive code
  • You do not lose sight of the goal
  • You enjoy refactoring
  • But you prefer to let your computer do your work for you

… then we want to get to know you.

If, on top of this, you can boast solid experience with a few of the following tools:

  • Spring (Boot/Cloud)
  • JAX-WS und JAX-RS
  • ReactJS, TypeScript, Webpack
  • Gradle, Git, SonarQube, Jenkins
  • JUnit, Cucumber, Selenium, testcontainers
  • MariaDB, Oracle, PostgreSQL, MongoDB
  • Docker, Ansible
  • Amazon Web Services, Microsoft Azure, Google Cloud
  • Machine Learning, Neural Network, Artificial Intelligence
  • Microservices, Micro Frontends
  • Reactive Programming

… then we absolutely must get to know you!

We may convince you to join us with:

  • Our teams and our abilities
  • Interesting and challenging software development projects
  • Hardware and equipment according to your preferences
  • Freedom to operate and responsibility to take over
  • Flexible working hours and home office days
  • An annual training budget for personal education
  • A cool office located in the city center of Białystok
  • Employee events
  • Participation in conferences and engagement in the Java community
  • Equal opportunities and diversity within the staff

… and not least with an attractive employment contract.

Your tasks are:

  • Full-Stack or Backend development with Java
  • Development of business-critical, customer-specific software solutions
  • TDD, Pair Programming, Code Reviews
  • Collaboration in agile teams
  • Knowledge Sharing, Craftsmanship, Continuous Improvement
  • Look outside the box

Too good to be true? Send us an email to and find out for yourself!

If:

  • Quality, agility, open-mindedness and passion describe your working style
  • Clean Code and Software Craftsmanship are no foreign words for you
  • You are always looking for improvement
  • You are fluent in English in speaking as well as in writing
  • You, as a team player, enjoy working independently and on your own responsibility
  • You love writing tests as much as productive code
  • You do not lose sight of the goal
  • You enjoy refactoring
  • But you prefer to let your computer do your work for you

… then we want to get to know you.

If, on top of this, you can boast solid experience with a few of the following tools:

  • Spring (Boot/Cloud)
  • EJB 3.x, JAX-WS und JAX-RS
  • Gradle, Git, SonarQube, Jenkins
  • JUnit, Hamcrest, Mockito
  • MariaDB, Oracle, PostgreSQL, MongoDB
  • Docker
  • Machine Learning, Neural Networks, Artificial Intelligence
  • Amazon Web Services, Microsoft Azure, Google Cloud
  • Microservices
  • Reactive Programming

… then we absolutely must get to know you!

We may convince you to join us with:

  • Our teams and our abilities
  • Interesting and challenging software development projects
  • Hardware and equipment according to your preferences
  • Freedom to operate and responsibility to take over
  • An annual training budget for personal education
  • Flexible working hours and home office days
  • A cool office located in the city center of Białystok
  • Employee events
  • Participation in conferences and engagement in the Java community
  • Equal opportunities and diversity within the staff

… and not least with an attractive employment contract.

Your tasks are:

  • Backend development with Java with a low frontend share
  • Development of business-critical, customer-specific software solutions
  • TDD, Pair Programming, Code Reviews
  • Collaboration in agile teams
  • Knowledge Sharing, Craftsmanship, Continuous Improvement
  • Look outside the box

Too good to be true? Send us an email to and find out for yourself!

If:

  • Quality, agility, open-mindedness and passion describe your working style
  • Clean Code and Software Craftsmanship are no foreign words for you
  • You are always looking for improvement
  • You are fluent in English in speaking as well as in writing
  • You, as a team player, enjoy working independently and on your own responsibility
  • You love writing tests as much as productive code
  • You do not lose sight of the goal
  • You enjoy refactoring
  • But you prefer to let your computer do your work for you

… then we want to get to know you.

If, on top of this, you can boast solid experience with a few of the following tools:

  • JavaScript/TypeScript
  • ReactJS
  • NPM, Webpack, Babel
  • Mocha/Jest/QUnit
  • Cucumber, Selenium
  • Git, SonarQube, Jenkins
  • Mobile-First, Offline-First Design

… then we absolutely must get to know you!

We may convince you to join us with:

  • Our teams, great colleagues and our abilities
  • Interesting and challenging software development projects
  • Hardware and equipment according to your preferences
  • Freedom to operate and responsibility to take over
  • Flexible working hours and home office days
  • An annual training budget for personal education
  • A cool office located in the city center of Białystok
  • Employee events
  • Participation in conferences and engagement in the Java community
  • Equal opportunities and diversity within the staff

… and not least with an attractive employment contract.

Your tasks are:

  • Frontend development with JavaScript and TypeScript
  • Development of business-critical, customer-specific software solutions
  • TDD, Pair Programming, Code-Reviews
  • Collaboration in agile teams
  • Knowledge Sharing, Craftsmanship, Continuous Improvement
  • Look outside the box

Too good to be true? Send us an email to and find out for yourself!
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