Backend Engineer

Kleinanzeigen is the most‑visited general classifieds site in Germany and is still growing at an amazing speed. We have over 50 million items for sale on our platform, and with more than 35 million unique users every month, we reach about 50% of the German internet population. Are you passionate about joining a purpose‑driven community that is dedicated to building an ambitious and diverse work environment?

Join Kleinanzeigen!

We seek a professional individual to join our team as a Senior Backend Engineer (d/f/m). In this role, you will be responsible for developing services for our mobility and motors domain to improve in verticalizing and up leveling the services we offer to our users. You will be part of a cross‑functional team including members from Product, User Experience, Analytics, and Engineering with the mission "to become the most convenient, fair and trusted digital market for second hand vehicles in DE".

• Work together with your multidiscipline team to develop a better search experience for our buyers, better ad management for our sellers, and bring new services to them
• Keep the platform’s architecture clean, stable, and scalable
• Handle up to 60k requests per second while the platform is still growing
• Drive your ideas for code, process, and product improvements
• Ensure quality and maintainability by improving build and test systems
• Bring in your perspective of how our users’ problems can be solved

• 3+ years of experience in backend development.
• Strong expertise in Java, Spring Boot, RDBMS (MySQL).
• You have a passion for writing clean code and an eye for simplicity and pragmatism.
• Ideally, familiarity with operating microservices on public clouds (e.g. k8s and AWS).
• Knowledge of event‑driven systems (Kafka)
• Understanding of object‑oriented and domain‑driven design.
• A passion for continuous learning and knowledge sharing.
• Problem‑solving and analytical abilities.
• Fluent in English (our working language).
• You have a speak‑up mentality and point out things that are not right in your opinion.