Principal Frontend Engineer - ZEOS Portal (all genders)

Role: Principal Frontend Engineer - ZEOS Portal Team: The B2B Platform department is the core engine enabling partners to seamlessly integrate with and scale within the Zalando ecosystem. By unifying complex business services under a high-performance platform umbrella, we provide a holistic API-first environment that empowers partners to grow their business with speed and flexibility. As a Principal Software Engineer, you will be a key architect of the common platform and ecosystem that powers both partner-facing and internal products. You will shape the technical landscape that allows diverse B2B solutions to interact, scale, and thrive. Together with an elite team of engineers and product managers, you will design the foundational REST services and microservices that serve as the interface between complex internal operations and the external market. With ZEOS we shape the future of the Zalando logistics ecosystem. Responsibilities: - Architect Scalable Ecosystems: Design and drive the technical vision for high-traffic customer portals and internal tools using React, TypeScript, and Node.js. - Master Modular Landscapes: Guide the transition and optimization of Micro Frontend (MFE) and SPA architectures, ensuring seamless integration across the ZEOS partner landscape. - Bridge Business & Technical Needs: Translate complex business opportunities into Solution Designs that are scalable, cost-efficient, and strictly compliant with industry standards. - Support Infrastructure & Security: Guide deployment strategies within AWS and Kubernetes environments, ensuring robust Web Security through the implementation of Okta/OpenID and sophisticated proxy/gateway configurations. - Foster Technical Excellence: Act as a core member of our Principal Community, driving cross-area architectural consistency and elevating development processes through CI/CD, high test coverage, and Design System (DS) maturity. - Align & Empower Delivery: Support multi-disciplinary teams (Engineers, Designers, PMs) and manage high-level stakeholders to ensure project alignment and technical integrity. Qualifications: - Experienced Strategic Leader: 3+ years of experience as a Principal Engineer or Solutions Architect, with a proven track record of leading complex, multi-team projects in cloud environments. - Deep Frontend Expertise: Expert-level knowledge of the modern web stack (React, TS, Webpack) and deep experience managing the complexities of Micro Frontends at scale. - Cloud & Infrastructure Knowledge: Comfortable navigating AWS and Kubernetes with a strong grasp of networking fundamentals, including reverse-proxies and API gateways. - Security-Conscious Mindset: Practical experience implementing modern authentication flows (OpenID/Okta) and protecting applications against sophisticated web vulnerabilities. - Agile Champion: Thrive in an Agile environment, owning the full development lifecycle from initial discovery to CI/CD deployment and automated testing. - Empathetic Mentor & Communicator: Excel at translating "tech-speak" for stakeholders and possess the leadership clarity needed to mentor senior engineers through difficult architectural decisions. - Balanced Practitioner: Master of delegation and high-level system thinking, but not afraid to get hands-on when a critical technical challenge requires direct expertise. 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) - 40% off fashion and beauty products sold and shipped by Zalando, 30% off Lounge by Zalando, discounts from external partners - Family support, including counselling and dedicated services for parents and carers - Company pension scheme - Employee shares programme - Health and wellbeing options, including Wellhub - Mental health support and coaching - Development through our training platform and biannual peer-to-peer review - 2 paid volunteering days a year - Relocation assistance (subject to prior agreement)