(Senior) Java Cloud Developer (m/f/d)

SIXT is in the middle of a transition from a car rental company to one of the world’s leading mobility providers. With our ONE app, we have successfully expanded our traditional rental business to unified mobility offering including car sharing and ride-hailing. Based on our in-house IoT telematics platform SIXT ConCar, we are currently enhancing our fully digital, premium self-service customer experience. We are searching for a senior Java (Spring) developer that has experience with our SIXT Tech stack or similar technologies. Our Kubernetes-based Microservices platform runs on AWS using Apache Kafka for high-volume, near-real-time event processing. We gain insights out of our data using AWS Athena and apply AI approaches and technologies. SIXT Tech offers multiple open positions and developer profiles (m/f/d). Engineering market-changing mobility solutions. Knowledge of the vehicle routing problem space or other geo-optimization problems is of advantage, but not required. Specialization in our IoT / Telematics platform SIXT ConCar. Excitement for embedded systems (you do play with Rasberry Pies, don’t you?) and automotive systems (you CAN speak car?) are welcome for this role, but not required. Apply now, join our journey and become a part of the SIXT family.


  • You will be working in an agile team designing, building and evolving our mobility products or IoT platform
  • You develop backend services in a cloud environment with modern microservices
  • You will understand and constantly challenge the status quo of your business domain and find pragmatic tech solutions
  • You question and optimize processes and implementations. You come up with suggestions for improvement, put these into a solid technical concept, while you collaborate intensively and make decisions within a team
  • You take full ownership of the product and services in your domain with a “you build it, you run it” attitude


  • You have experience in a technologically sophisticated environment such as building cloud-native applications, solving scalability challenges, designing event-driven solutions - ideally in a startup dynamic setting
  • You are experienced in designing software in complex domains and are have successfully applied approaches such as DDD
  • You have strong development and architecture experience in Java and you have proven experience in building cloud-native applications, Strong experience in the development of a custom Java application on a Cloud Platform, preferably with Spring
  • You have a good understanding of event-driven platforms, RESTful web services, gRPC services and Message Brokers, preferably Apache Kafka
  • You have got experience in working with containers and container orchestration and monitoring systems, preferably Docker, Kubernetes, Prometheus and Instana


Working at SIXT not only means creating the future of mobility, but also offers personal benefits. This means especially for you: 30 days of vacation, no dress code, choose your own device, support for pension plans & capital-forming benefits, mobility allowance of 20€/month and flexible working hours. Due to the current situation, we are of course working completely in mobile work wherever possible. But even under normal conditions, from now on you can decide from where you want to approach your work: Up to 50% of your monthly working time you can work completely mobile and from anywhere. In addition, we offer you a super international working environment, numerous trainings for your individual development, participation in external conferences and we even organize internal dev & tech talks. Our Feel Good Manager will be happy to help you with the organization or to assist you when you move to Germany from abroad and need to organize visas or other administrative procedures. It's also important to balance out your work: That's why you have access to our employee restaurant (and yes, we insist on restaurant, because it's too high quality for a canteen) as well as various recreational opportunities such as the gaming area, the SIXT soccer team or the SIXT choir - to name just a few. In addition, of course, employee benefits for SIXT rent, share, ride and SIXT+, discounts with partners for travel, technology, clothing, etc. as well as free cyber sports courses. In addition, your colleagues are pretty awesome. Which is important when you spend so much time together, and besides, no wonder when you get a bonus for referring friends as new employees. If something does bother you, you'll always have someone to confide in through regular feedback sessions, employee surveys or our psychological hotline through the Fürstenberg Institute. Otherwise, we live "work hard, play hard" - our parties are legendary! We also demand and promote DiverSIXTy, a corporate culture of acceptance, appreciation, and respect, in which everyone can develop their personality and ideas.