BackendEngineer(Java/Kotlin)(m/f/x)

We are looking for a passionate and experienced Backend Software Engineer who loves working in a team and has a strong getting-things-done attitude. You will be part of a small but fun team of 4 people working on some of the most business-critical and technically interesting parts of rebuy's platform. Our scope covers AI-powered customer support automation, payment systems, and marketplace integrations (Amazon, eBay). We build on a modern, actively evolving stack, and we expect everyone on the team to use AI tools as a natural part of their workflow. Ready to become part of the most important mission on this planet? We are rebuy, pioneers in the sustainable reuse of electronics and media and we are looking for you! Our mission: to make circular living accessible to all, one transaction at a time. By giving products a second chance, we reduce resource consumption and avoid unnecessary e-waste. Our team of 500 comes from all corners of the world; we drive things forward collaboratively, take personal responsibility, value positive critical thinking, and persistently serve our customers and planet. ### Key Responsibilities: * Write code that is simple, readable, testable and maintainable * Implement code reviews, give helpful feedback, actively contribute in team discussions and decisions * Know the sweet spot between implementing beautiful and charming solutions which incorporate all existing software design patterns and just getting it done * Suggest changes to our software that simplify the technical architecture of individual services or pay down technical debt * Actively take over ownership for projects and collaborate with different teams across the organization * Maintain existing services and contribute to developing the new solutions ## Requirements * 4+ years of professional software development experience in Java or Kotlin (mandatory) * Computer Science fundamentals in algorithm design, data structures, problem-solving, and complexity analysis * Knowledge an