Senior Backend Software Engineer

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 You’ll build resilient backend services, core platform applications, and high-throughput integrations that power Europe’s top e-commerce brands at scale. We focus on scalable APIs and seamless data transfer, giving you the technical autonomy to solve complex engineering challenges and directly enhance our platform ecosystem. If you thrive on high-impact systems and modern engineering practices, this is where you'll make a real impact. WHAT WE’D LOVE YOU TO DO (AND LOVE DOING) Design & Develop Architect and build clean, scalable backend services and platform apps using modern JVM languages (Kotlin/Java, JDK 21+) or Python (3.11+). Collaborate Partner across Product, Frontend Engineering, and Platform teams to translate complex business challenges into robust APIs, integrations, and data flows. Problem Solve Collaboratively address technical challenges, using pragmatism and research to continuously improve system resilience, performance, and developer experience. Own Your Work Take full ownership of features from concept to production, backing your code with comprehensive unit, component, and E2E testing to ensure maintainability. Innovate & Grow Evolve service architecture, help define system boundaries, and share technical insights as our platform expands. WE’D LOVE TO MEET YOU IF A strong foundation or eagerness to deepen expertise in modern JVM languages (Kotlin/Java, JDK 21+) or Python (3.11+), using frameworks like Spring Boot or Django/Flask. Passion for REST API design and OpenAPI, alongside experience with or interest in relational or NoSQL databases (e.g., PostgreSQL, MySQL, DynamoDB, MongoDB). Commitment to software quality, with comfort in writing reliable code backed by testing frameworks like JUnit 5, pytest, or E2E automation tools. Proactive, solution-oriented mindset paired with clear communication skills in English, both written and verbal. OUR OFFER Tradebyte provides a range of benefits, here’s an overview of what you can expect. Ask your Talent Acquisition Partner to learn more about what we offer. Employee shares program 40% off fashion and beauty products sold and shipped by Zalando, 30% off Lounge by Zalando, discounts from external partners 2 paid volunteering days a year Hybrid working model - work where it works for you within Germany or the UK, with occasional office attendance required for moments that matter. Work from abroad for up to 30 working days a year 27 days of vacation a year to start for full-time employees Relocation assistance available (subject to prior agreement) Family services, including counseling and support Health and wellbeing options (including Wellhub, formerly Gympass) Mental health support and coaching available Drive your development with our training offerings and biannual peer-to-peer review