Having a global team of 16,000 colleagues and more than 70 nationalities. And enabling many of them to work flexibly when needed.
Both count. Both are us.

(Junior) Java Developer (m/f/d) - IoT


  • As part of a Scrum team you are responsible for the development and operation of our IoT backend
  • You design and develop APIs and interfaces for apps and other systems based on Java microservices and stream processing
  • Using your DevOps expertise, you will evaluate and maintain infrastructure components based on "Infrastructure as Code"
  • You will work with the most modern technology stacks such as Kubernetes (AKS), Java (11 & 17), Spring/Spring Boot, Stream Processing, Apache Kafka, MongoDB, Azure Cloud Services (API Management, IoT-Hub, etc.)
  • Your technological toolbox includes GitHub, CI/CD with GitHub Actions & Azure DevOps, Jira and Confluence


  • You have ideally gathered (first) project-related experience in companies, universities or open source communities
  • You have ideally already proven your technical skills and comprehensive knowledge of modern development methods and tools as well as continuous integration and automated testing 
  • You have gained (initial) agile experience in a project environment with Scrum or Kanban and would like to deepen it
  • You are interested in constantly learning, improving yourself and your team, developing beyond your usual subject areas and driving our digital future with teamwork and intercultural skills
  • Your good English language skills and your open and trustworthy personality help you communicate confidently on all levels; a good German level is highly appreciated 
  • An entrepreneurial, independent and proactive mindset complete your profile


  • Continous Growth: Individual growth and learning is part of our DNA. Our colleagues receive specific training to make the most of their potential and grow as a person.
  • Come as you are: We want to get to know the real you. We welcome everyone and celebrate diversity.
  • Passion: Like our heating systems, we are burning for what we do! We question the status quo – and are always searching for creative solutions in our quest into a more sustainable world.
  • Edu8cation: Constant learning opportunities for both technical and personal growth through a range of workshops, seminars, events, and e-learnings
  • Technology: We work with the state-of-the-art technology and strive for innovation
  • Flexibility: We offer up to 70% remote work. In addition, our employees can work from a European Union country for up to 30 days a year


Sven Wagenknecht

+49219118 4666

Company:  Vaillant GmbH

Remscheid, DE

Country:  Germany

The Vaillant Group is a global market and technology leader in the fields of heating, ventilation and air-conditioning technology. Join our team of 16,000 colleagues from more than 70 countries who work every day for a better climate – for people at home and the environment. We work on large-scale, innovative and strategic projects. With small, everyday gestures so that we can all play our part. Act global, work global. And become part of a global team. We sell our products in around 60 countries, using ten production and development sites in six European countries, as well as China.

Working for us makes you responsible for the future – your own, and that of our planet. We can offer you excellent conditions.


Apply now »
Since we work climate-neutrally, we can only process online applications. Let's save the climate together and avoid paper applications.