Our customers use our platform mostly on their mobile devices creating ~45.000 requests per second on our backend systems at peak times. Our core tech-stack is based on Java/Kotlin/Spring and MySQL/Cassandra/ElasticSearch/Kafka. We seek for a high velocity on rollouts, which implies automation, early integration and continuous process improvement. Right now we are moving towards a decoupled and flexible architecture. Our target infrastructure is built around Docker, OpenStack and Kubernetes.To support our team we are looking for you as a Senior Backend Engineer (f/m/d).What you'll do:Build the technology future of online classifieds in a scalable, clean wayImprove our applications and APIs to become better each dayEnsure code quality and maintainability by improving build and test systemsBe an interface between Product Management, Design, Business and CustomersDrive your own ideas for code and process improvements and achieve the next level together with the teamBe involved in the whole development lifecycle from architecture to QA and deploymentWhat you'll bring:Passion for clean code and an eye for simplicity and pragmatismExcellent programming skills in Java and the Spring FrameworkDeep know-how in object-oriented designGet up to speed with new systems and concepts easilyBeliever in teamwork and a DevOps mindsetExperience with Continuous DeliveryKnow-how in manual testing and test automation (e.g. JUnit, Selenium, REST-assured)Experience with RDBMS and/or NoSQL (e.g. Cassandra, MySQL)Ability to coach others in a field of expertiseIdeally experience with search platforms (e.g. ElasticSearch)