Senior Applied Scientist (all genders)

Role: Senior Applied Scientist (all genders) THE ROLE & THE TEAM Partner Tech builds the products, tools, and insights that help Zalando partners grow with confidence. Within Assortment, Steering & Data Insights (ASDI), we develop data products and decision systems that improve assortment composition, in-season steering, demand understanding, partner performance insights, and commercial automation across our wholesale and Partner Platform businesses. As a Senior Applied Scientist, you will focus primarily on measuring the impact of ASDI products while also supporting selected strategic Partner Tech-wide initiatives where rigorous evaluation is critical. You will design experiments where possible and robust observational studies where they are not, helping us understand the incremental effect of product, algorithmic, and policy changes on outcomes such as GMV, profitability, and operational efficiency. Working closely with Product, Engineering, Analytics, Applied Science and business stakeholders, you will turn ambiguous questions into clear evaluation strategies, reliable evidence, and better product decisions. WHAT WE'D LOVE YOU TO DO (AND LOVE DOING) - Lead impact measurement for ASDI products and strategic Partner Tech initiatives. You will own the experimentation charter and work with cross-functional teams to define hypotheses, estimands, guardrails, and success metrics for initiatives in ASDI and broader high-priority Partner Tech topics. - Develop state-of-the-art machine learning and econometric models. You will design and develop models for observational studies to estimate the incremental effect of products, algorithmic, and recommendations across the product area thereby optimizing our recommendations and products. - Choose the right causal design for the question. You will use randomized experiments where feasible and quasi-experimental methods when they are not, balancing scientific rigor with practical constraints. - Translate evidence into decisions. You will communicate findings, uncertainty, and trade-offs clearly to technical and non-technical audiences, helping shape rollouts, prioritization, and investment choices. - Build trusted, extensible KPI frameworks: You will design and develop robust and extensible KPI frameworks to enable evaluation and prioritization of multiple products in the domain. - Raise the bar for measurement in ASDI. You will empower the team to stay up-to-date with the latest research in relevant fields like causal machine learning, econometrics, and optimization. You will help define best practices for experimentation and observational causal inference, support peer reviews, and mentor colleagues. WE'D LOVE TO MEET YOU IF - You hold a PhD in Economics, Econometrics, Statistics, Causal Inference or Causal Machine Learning. - You have at least 2 years of industry experience in data science with a focus on experimentation and causal inference, and have used these methods to evaluate products, algorithms, recommendations, or interventions in complex, data-rich environments. - You bring deep expertise in experimentation and causal inference, including panel data methods, causal inference under unconfoundedness, doubly robust methods. - You can independently drive a scientific workstream by developing an applied research agenda, and translate research into actionable insights at scale. - You code fluently in Python and SQL and are comfortable working with large datasets and modern analytical platforms such as Spark or Databricks. - You communicate clearly to diverse audiences, connect scientific insights to business impact, and help others do stronger work through mentoring, peer review, or knowledge sharing. 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 - Employee shares programme - 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 counselling 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