ABOUT TRADEBYTE At Tradebyte, we work with the biggest players in e-commerce - from trendsetting fashion brands to major online retailers. Our goal is to create a workplace where everyone feels valued, supported, and empowered. We offer flexible work schedules, professional development opportunities, and a real commitment to work-life balance. We embrace diverse perspectives and ensure that every voice is heard and respected, because you’re unique and that matters to us. As we continue to grow, we’re looking for new colleagues who share our passion. Love what you do - do what you love. Join Tradebyte, an independent company within the Zalando Group! THE ROLE AND THE TEAM As a software engineer in one of our core product teams, you’ll help shape the modern evolution of our technology. We’re building scalable, high performance software that powers thousands of brands and retailers across Europe. You’ll contribute to a growing ecosystem designed for resilience, speed and customer impact. If that sounds exciting, we’d love to talk! WHAT WE’D LOVE YOU TO DO (AND LOVE DOING) As a key member of our engineering team, you will drive the development of our user-facing features. You'll take ideas from concept to production, ensuring we build scalable, high-quality, and user-friendly applications. Design & Develop: Architect, build, and maintain clean, efficient, and reusable code using either Java or Python. Both are supported and strong proficiency in one is expected Problem Solve: Take a proactive approach by suggesting, researching, and implementing solutions to complex technical challenges. Collaborate: Work closely with Product Management, Frontend, and Platform teams to design robust APIs and backend services. You will translate business problems into scalable technical solutions. Own Your Work: Take full ownership of the services you build, including writing comprehensive unit and integration tests to ensure quality and long term maintainability. Innovate & Improve: Always look for opportunities to improve systems, whether it is performance, cost efficiency, architecture, or developer experience. Your technical insight and pragmatism will be key. Align & Lead: Act as a technical leader within your team and on cross team projects, helping to define service boundaries, ensure quality, and deliver reliable solutions. WE'D LOVE TO MEET YOU IF Proven ability and experience building scalable backend systems using either Java or Python Technical Skills: Strong experience with Java (JDK 21 or newer) or Python (3.11 or newer) Experience with backend frameworks such as Spring Boot (Java) or Django/Flask (Python) Experience with relational databases such as PostgreSQL or MySQL and NoSQL databases such as DynamoDB or MongoDB Strong knowledge of REST API design, OpenAPI, and optionally SOAP Familiarity with event and streaming systems, including technologies like Amazon SQS and Amazon Kinesis Good understanding of AWS services such as Lambda, EC2, S3, and OpenSearch Proficient with containerisation tools such as Docker, and local cloud emulation tools such as LocalStack Experience with CI/CD and GitOps using tools like GitLab, Bitbucket, GitHub, and Argo CD Quality & Testing: Unit and component testing: Java: experienced with JUnit 5 for backend test coverage Python: experienced with pytest for backend logic and component End to end testing: Java: familiar with E2E test frameworks such as Cucumber for service and integration testing Python: experienced with Radish or Behave for validating backend workflows Mindset & Communication: You have a proactive approach, constantly suggesting and finding solutions Your creativity and attention to detail drive you to improve everything you touch You have a very good command of English (written and spoken) EMPLOYEE BENEFITS YOU’LL LOVE You’ll play a decisive role in shaping an agile, fast-growing, international company and be supported by an open-minded working environment Competitive salary package, employee share shop, 40% Zalando shopping discount (30% Zalando Lounge) You’ll be given various learning and development opportunities to enhance your professional development Flexible working hours, home office options 27 vacation days per year that increase up to 30 days, volunteering time off and several sabbatical options after 2 years We’ll help you commute to the office with zero emissions: through a rented company bike or by charging you electric car at our e-charging station Access to additional German or English classes to improve your language skills Visa support for our foreign employees relocating to Germany A variety of health offers to support your well-being, as well as free beverages and fruits