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Zalando

Online fashion retail marketplace and logistics

Principal Software Engineer

Backend EngineeringConfirmed live in the last 24 hours
Full-timeBerlin, Germany

About the Job

Requirements

  • Recognized expertise in Python, with a deep understanding of software design, data modeling, and distributed systems.
  • A proven track record of deploying AI models into production and managing technical debt associated with high-volume AI applications.
  • Ability to decompose ambiguous AI requirements into clear technical designs that balance business value with technical constraints.
  • Experience leading cross-team projects and managing dependencies across multiple delivery teams.
  • Ability to explain complex AI technical concepts to non-specialists and senior management to drive decision-making.
  • Active participation in the engineering community and service as a talent champion for hiring and developing senior talent.

Responsibilities

  • Own and drive the technical design for large-scale projects integrating Python-based AI/ML microservices into the production environment.
  • Partner with Applied Scientists to move experimental models into reliable, high-performing production services at scale.
  • Design and execute technical improvements for intelligent query routing and automated response workflows, supporting the long-term strategic vision.
  • Promote operational excellence by conducting architecture and production-readiness reviews to ensure AI systems are observable and scalable.
  • Lead engineers across the department, enabling them to deliver complex features and supporting their professional growth.
  • Contribute to engineering standards for AI productionization and influence the internal Tech Radar.

About the Company

Zalando

Online fashion retail marketplace and logistics

Zalando operates as a European online marketplace for fashion and lifestyle items, selling clothing, shoes, and accessories directly to consumers and earning commissions from third-party sellers (plus Zalando Plus). Shoppers use its website or app to browse brands, and Zalando handles order processing and logistics, offering free delivery and free returns along with personalized recommendations and optional faster shipping for Plus members. It differentiates itself by combining direct sales with a large marketplace across 25 European markets, delivering a wide product range with strong logistics and a seamless shopping experience. Its goal is to remain a leading European online fashion retailer by connecting customers with many brands and improving convenience and services through technology and premium options.

Company size
10,001+
Company stage
IPO
Headquarters
Berlin, Germany
Founded
2008

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