Job Description

Kleinanzeigen reaches 36M+ monthly users and is Germany’s leading online classifieds market. We are a sustainability-focused platform where you won't just write code; you will power the services that bridge our high-traffic backend with seamless user experiences.

Joining the Edge team means working on the bedrock of Kleinanzeigen, dealing with high-throughput, low-latency and highly-efficient services that require a 'you build it, you run it' mindset, offering you deep exposure to modern infrastructure and platform architecture.

Job Requirements

What You’ll Own
As a Backend-Heavy Full Stack Engineer, you’ll be a central driver for the services that power user privacy and media delivery at scale. You will own the full development lifecycle: from design and implementation to deployment and maintenance. Your impact will include:

Core Systems Architecture: Designing and scaling critical microservices using mostly Java and Spring Boot that support 36M+ monthly users.
Full Lifecycle Responsibility: Applying "build it,



run it" mentality—you aren't just writing code; you’re ensuring robustness, scalability, and observability in production.
End-to-End Delivery: Crafting seamless user experiences by integrating our robust backend APIs with high-quality, maintainable frontends in TypeScript and React.
Strategic Engineering: Driving improvements in our development practices, testing standards, and CI/CD pipelines to keep our team velocity high and our systems healthy. For frontend components, you will maintain high standards using tools like Vitest and Playwright.
Our Tech Toolbox
We believe in picking the right tool for the job. Our core environment is built on modern technologies, including:
Backend: Java, Spring Boot, Golang, python
Frontend: NextJs, React, TypeScript
Infrastructure & Messaging: AWS, Kafka, CloudFormation, Kubernetes
We value technology-agnostic engineers who are comfortable navigating this stack and are open to learning new technologies

📌 Full Stack Engineer (Barcelona)
🏢 Adevinta
📍 Barcelona