Job Description

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 are looking for a professional individual to join our team as a Senior Full Stack Engineer (d/f/m). In this role, you will be responsible for developing services for our trust and safety domain to prevent fraud and safeguard our users. You will be part of a cross-functional team including members from the areas of Product, Customer Service, Analytics and Engineering with the mission "to make our platform a safer place to trade”. This is your opportunity to improve the experience of millions of users and have an impact by building a platform that enables sustainable trade for everyone.

Job Requirements





At least 6+ years of programming experience in Java backend development with strong knowledge of Java Core APIs, Spring Framework and Spring Boot, TypeScript and React.
Proven experience designing and operating robust, scalable distributed systems. Ideally on public clouds (e.g. AWS with k8s)
Solid understanding of system design, architectural trade-offs, and evolving existing systems
Strong knowledge of event-driven systems (e.g. Kafka)
Experience with RDBMS and NoSQL (preferrably MySQL, Cassandra, Elasticsearch)
Strong engineering fundamentals, including Domain-Driven Design and Clean Code practices.
Willingness to participate in out-of-office on-call rotations as part of owning production systems is required.
Experience mentoring engineers and contributing to team growth through knowledge sharing
Familiarity with AI-assisted development tools and an understanding of their trade-offs (e.g. quality, security, cost)
You have

📌 Senior Full Stack (Barcelona)
🏢 Adevinta
📍 Barcelona