Senior Backend Engineer - ZEOS (all genders)

THE ROLE AND THE TEAM The ZEOS B2B Platform is the high-performance engine that allows our partners to seamlessly integrate into the Zalando ecosystem. As a Senior Backend Engineer, you will be a key architect of the services that power our partner-facing products and internal operational tools. Our mission is to transform complex business requirements into a scalable, API-first platform that empowers partners to grow with speed and flexibility. In this role, you will lead the development of mission-critical microservices, ensuring they are resilient, secure, and cost-efficient. You will work within an agile, cross-functional team of engineers and product managers where technical excellence is balanced with business impact. At ZEOS, seniority means taking a holistic view of our system landscape—mentoring your peers, driving technical alignment across teams, and ensuring that our "You Write It, You Run It" culture is lived every day. INCLUSIVE BY DESIGN If you think you have what it takes, we encourage you to apply even if you don't meet every single requirement. You may just be the right candidate for this or other roles! At Zalando, our vision is to be the leading pan-European ecosystem for fashion and lifestyle e-commerce – one that thrives on diversity and is truly inclusive by design. We believe that diverse teams fuel innovation and creativity, and we actively seek out talent from all backgrounds. We actively seek to reduce bias in our hiring and employment processes, focusing on your qualifications, skills, and contributions. To support this, we kindly ask that you refrain from including personal details such as your photo, age, or marital status in your CV, ensuring a fair and equitable evaluation based solely on your abilities and potential. We are committed to providing an exceptional and accessible candidate experience for everyone. If you require any accommodations to support you throughout the hiring process, please let us know – we are here to assist you. Discover more about our commitment to creating a diverse and inclusive workplace: https://jobs.zalando.com/en/our-culture/diversity-and-inclusion WHAT WE’D LOVE YOU TO DO (AND LOVE DOING) Engineer Scalable Backend Systems : Design, develop, and evolve high-performance Microservices using Java and Spring Boot, ensuring they handle the complexities of a global B2B landscape. Design Intuitive APIs: Help us build RESTful services that prioritize clarity and ease of use, ensuring a seamless experience for every developer who interacts with our platform. Own the Full Lifecycle : Support the "You Write It, You Run It" philosophy. You will be responsible for the entire journey of your code—from initial design and Gradle-based builds to deployment and 24/7 operational health. Master Cloud Infrastructure : Leverage AWS and Kubernetes to build resilient, distributed systems that are compliant-by-design and operationally transparent. Drive Engineering Standards : Set the bar for code quality through rigorous testing, code reviews, and the use of modern tools like Jackson for efficient data processing. Collaborate Across the Stack : While your heart is in the backend, you enjoy collaborating with frontend teams and have an interest in Fullstack contexts to ensure end-to-end feature success. Mentor and Guide : Actively share your knowledge within the team and across the ZEOS community, helping to navigate technical uncertainty and architectural trade-offs. WE'D LOVE TO MEET YOU IF Seasoned Java Developer : You are a seasoned Java Developer with deep expertise in Spring Boot and a strong grasp of the modern JVM ecosystem (including build tools like Gradle). Thoughtful Architect : You have extensive experience in Microservice architectures, distributed systems, and designing clean, versioned REST APIs. Cloud Native Contributor : You are proficient in deploying and operating applications within AWS and are comfortable navigating Kubernetes environments. Quality-Minded Practitioner: You are highly skilled in building CI/CD pipelines and believe that automated testing and observability are fundamental to "Senior" level engineering. Agile Partner : You thrive in agile environments, taking ownership of complex topics and moving them from discovery to production with an analytical and solution-oriented mindset. Effective Communicator : You possess excellent English skills and the ability to translate technical complexity into actionable plans for both engineers and stakeholders. Fullstack-Curious : You have an interest in how the frontend consumes your services and are happy to jump across the stack to help the team deliver a cohesive product. OUR OFFER Zalando 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. 27 days of holiday a year to start for full-time employees (+1 day for every calendar year up to 30 days) 2 paid volunteering days a year Hybrid working model with up to 60% remote per week, actual practice is up to each team to best support their collaboration Work from abroad for up to 30 working days a year Employee shares program 40% off fashion and beauty products sold and shipped by Zalando, 30% off Lounge by Zalando, discounts from external partners 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 through our training platform and biannual peer-to-peer review