About this role

The ZEOS department is responsible for all partner-facing Zalando Logistics Solutions. We provide a holistic approach to delivering the fulfillment solutions that meet our partner’s needs by unifying these services under a single umbrella. We aim to provide our partners with a profitable fulfilment experience, and we see that to do this, Machine Learning, Operations Research and Data-driven solutions will play a pivotal role.

We are seeking an Applied Scientist who is fueled by the desire to build innovative and impactful ML/Optimization systems for our B2B logistics partners. You will join an existing team of Applied Scientists, and Machine Learning Engineers and work in a cross‑functional setup with Product Managers, Data and Software Engineers.

The team’s focus is helping our B2B partners improve inventory health and order fulfilment efficiency. You will be building various ML/DL forecasting models (demand, returns, lead‑times), stochastic inventory optimization solutions and recommendation services that generate these key insights for our partners and enable them to make data‑driven decisions about their article assortment and inventory. You will play a key role in a cross‑functional team!

Inclusive by Design

At Zalando, our vision is to be the leading pan‑European ecosystem for fashion and lifestyle e‑commerce – one that is inclusive by design. We only assess candidates based on qualifications, merit, and business needs. We welcome applications from people of all gender identities, sexual orientations, personal expressions, racial identities, ethnicities, religious beliefs, and disability statuses. We only want to know why you're great for this role, so please avoid including your picture, age, and marital status in your CV as well.

We want to provide you with a great candidate experience. Please feel free to inform us of any accommodations you may need, so we can best support and assist you throughout the hiring process.

do.BETTER – our diversity & inclusion strategy: https://jobs.zalando.com/en/our-culture/diversity-and-inclusion

Why you should be interested…

Shape the Product from Day One: You won't be a “model factory” stuck in a silo! You will be a core scientific partner, working directly with product and user research to define the problem, not just solve it. Your expertise will directly influence the product roadmap and identify new opportunities to create value for our partners.
Solve High‑Stakes, Complex Scientific Problems: This is your chance to go beyond standard forecasting. You'll be tackling cutting‑edge challenges in stochastic inventory optimization, multi‑echelon demand forecasting (including returns and lead‑times), and building recommender systems for assortment planning. Your work will be at the absolute core of our partners' profitability.
End‑to‑End Ownership: You will have the autonomy to see your ideas through from initial research and prototyping all the way to production. You will define the metrics for success, collaborate with engineers to deploy your models as scalable services, and monitor their real‑world impact on partner KPIs.
Drive Impact at a multi‑merchant scale: Your solutions won't just help one partner. You will be building platform‑level services that scale across hundreds of diverse partners/merchants, directly influencing millions of euros in merchandise value and shaping the future of a more sustainable and efficient e‑commerce logistics network.

We’d love to meet you if…

Educational background in a quantitative field – Masters degree or higher preferred.
3+ years of hands‑on industry experience in an Applied Scientist, Data Scientist, or Research Scientist role, applying scientific methods to solve business problems.
Industry demonstrated knowledge and skills in at least one the following areas:
- Machine Learning or Deep Learning, particularly applied for time‑series forecasting (e.g., LGBM, ARIMA, Prophet, Transformers, Nixtla, Darts,…)
- Machine Learning Engineering (e.g. service design, batch processing, GPU computing, git, docker, CI/CD, software testing)
- Operations Research and Optimization (e.g., stochastic inventory models, linear/integer programming, Monte Carlo simulations,…)
Proficiency in SQL and experience working with large‑scale datasets.
Strong communication skills with the ability to explain complex scientific concepts to product managers and business stakeholders. A collaborative, product‑oriented mindset and a desire to see your work create real‑world impact.
An entrepreneurial mindset, you value a diverse and fast‑paced business environment, and hence balance your passion for research with pragmatism to drive actions and create impact for our customers.
You have a passion for learning and growing by doing. We are here to help you. One of the preferred values of the team is: “High Challenge, High Support”.
Excellent communication skills! We cherish our open and direct feedback culture in the team.

Our Offer

Employee shares program
40% off fashion and beauty products sold and shipped by Zalando, 30% off Lounge by Zalando, discounts from external partners
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
27 days of vacation a year to start for full‑time employees
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