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Senior Backend Engineer - ZEOS

Germany, Berlin · Job Posted May 27, 2026
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Job Description

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.

Job Responsibility

  • 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.

Requirements

  • 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.

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

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