Java Backend Developer (Microservices) (f/m)

Work in an international, cross-functional team to deliver real value to customers. Hybrid working: 20% office / 80% home, plus 1–2 trips to Munich per year. Office presence is scheduled on a team-needs basis, typically a few consecutive days each month. Please note that scheduling may change, but the 20/80 hybrid split will remain.

• At least 3 years of professional software development experience, with an open-minded and proactive approach to new challenges
• Strong hands-on experience with microservices and related technologies: Java, Kotlin, Spring, Spring Boot
• Minimum 1 year of hands-on experience with Apache Kafka
• Solid understanding of RESTful APIs, microservices architecture foundations, and authentication methods
• Experience with both relational (PostgreSQL) and NoSQL databases (MongoDB)
• Knowledge of Jenkins & CI/CD best practices
• Strong adherence to clean code principles and design patterns
• Excellent verbal and written communication skills
• Strong collaboration skills, including working effectively with stakeholders, product owners, and other engineering teams
• Positive attitude and an ability to approach challenges constructively
• Proactive mindset with a willingness to take initiative, propose improvements, and support continuous enhancement of the platform
• Very good presentation skills, including the ability to clearly communicate technical topics to different audiences

Nice to have:

• Knowledge of digital certificates / PKI
• Experience with AWS or other Cloud Providers (Terraform is a plus)
• Basic understanding of stream processing tools (Apache Flink and/or Kafka Streams)
• Experience with CloudFoundry
• Basic understanding of JWT

• Develop and enhance the microservices architecture of the Home Connect IoT platform
• Contribute to both new feature development and existing system maintenance (approx. 50% maintenance work)
• Design and implement solutions using Java and Kotlin (21/17)
• Participate in the full end-to-end development process—from requirements gathering to architecture design, implementation, testing, and deployment
• Process and analyse data streams using Apache Flink and Kafka Streams
• Work with device certificates, including certificate orchestration for IoT devices
• Collaborate with stakeholders and other technical teams to solve complex problems and ensure smooth integration across systems