Expert Data Scientist - Customer & Decision Intelligence (m/f/d) 1

MediaMarktSaturn Plattform Services GmbH; Ingolstadt; Hybrid; EUR 70,000 - 110,000; Full time

Job summary

MediaMarktSaturn Retail Group seeks a scientifically grounded Data Scientist to join its Decision Science team in Ingolstadt. You will develop statistical, mathematical, and machine learning solutions for Operations Intelligence and Customer Intelligence, spanning forecasting, pricing, inventory, personalization, and CRM analytics.

You will collaborate with data engineers and ML engineers to build scalable pipelines on Google Cloud Platform (GCP) and deliver production-ready AI products that

Qualifications

• Master’s degree or PhD in a quantitative field (e.g., Math, Stats, CS, Data Science).
• Approx. 4–5 years of relevant experience after graduation in data science or ML.
• Strong foundation in probability, statistics, linear algebra, optimization, and numerical methods.
• Proven ability to compare classical models and justify choices with scientific reasoning.
• Experience building and validating predictive and optimization models for e‑commerce or retail contexts.
• Excellent Python and SQL programming skills with large-scale data.
• Familiarity with GCP (BigQuery, Vertex AI) and modern ML frameworks.

Responsibilities

• Translate business questions into mathematical/statistical problems.
• Develop and deploy predictive, prescriptive, and optimization models to improve business performance.
• Collaborate with data and ML engineers to build scalable data pipelines and production ML solutions.
• Evaluate model performance, validate assumptions, and monitor outcomes over time.

Skills

Analytical thinking

Communication

Stakeholder management

Scientific reasoning

Team collaboration

Education

Master’s degree (MSc) or PhD in Mathematics, Statistics, Physics, Computer Science, Data Science, OR Operations Research

Tools

Python

SQL

NumPy

SciPy

statsmodels

scikit-learn

XGBoost

LightGBM

TensorFlow

PyTorch

BigQuery

Vertex AI

Job description

Your Tasks

• Deliver measurable commercial and operational impact through operations intelligence, customer intelligence, and personalization.
• Contribute to the development of the Decision Science roadmap for operations intelligence and customer intelligence by applying scientifically sound statistical modeling, mathematical optimization, and machine learning.
• Translate business questions into well-defined mathematical and statistical problems, critically assess the available data, and select and justify the most appropriate modeling approach.
• Operations Intelligence: develop models for demand forecasting, inventory and replenishment optimization, assortment and allocation, supply chain and logistics optimization, workforce and store capacity planning, and pricing and markdown optimization.
• Customer Intelligence: develop recommendation systems and models for personalization, customer segmentation, customer lifetime value, churn, propensity, marketing effectiveness, and uplift.
• Choose methods based on assumptions, interpretability, robustness, computational efficiency, and empirical performance: use a simple linear model when sufficient, and advanced ML or AI only when it adds demonstrable value.
• Build predictive, prescriptive, and optimization models (e.g., linear/integer programming, simulation, causal inference, experimentation) to improve business performance and operational efficiency.
• Collaborate with Data Engineers and ML Engineers to build scalable data pipelines, feature stores, and production-ready ML solutions using Google Cloud Platform (BigQuery, Vertex AI).
• Evaluate, monitor, and continuously improve model performance through baseline comparisons and the validation of assumptions, uncertainty estimates, and generalization, while ensuring business value.

Your Profile

• Master’s degree (MSc) or PhD from an established, internationally recognized university in Mathematics, Statistics, Physics, Computer Science, Data Science, Operations Research, or a closely related quantitative field.
• Approximately 4-5 years of relevant professional experience after graduation in data science, statistical modeling, applied mathematics, or machine learning.
• A strong foundation in probability theory, statistical inference, linear algebra, numerical methods, and mathematical optimization, with the ability to explain the assumptions and limitations of different models.
• Proven ability to compare classical statistical models, optimization methods, and machine learning approaches and justify the choice using scientific reasoning and evidence.
• Practical experience in developing and validating predictive and optimization models; experience in operations intelligence (forecasting, inventory, supply chain, and pricing) or customer intelligence (recommendation systems, personalization, and CRM analytics) is an advantage.
• Experience in e-commerce, marketplaces, digital products, media, retail technology, or customer-facing systems is an advantage.
• Excellent programming skills in Python and SQL, with experience processing large-scale structured and unstructured datasets.
• Experience with scientific Python libraries (e.g., NumPy, SciPy, statsmodels, and scikit-learn) and ML frameworks such as XGBoost, LightGBM, TensorFlow, or PyTorch.
• Familiarity with Google Cloud Platform (GCP), including BigQuery, Vertex AI, and modern MLOps practices, is an advantage.
• Understanding of modern AI methods, including deep learning and Generative AI / LLMs, and the judgment to identify when these approaches are—or are not—appropriate.
• Strong analytical and problem-solving skills with the ability to translate business needs into sound mathematical and statistical solutions.
• Excellent communication and stakeholder management skills, with the ability to explain complex concepts to both technical and business audiences.
• A collaborative mindset, scientific curiosity, intellectual independence, and a pragmatic approach to delivering measurable business impact.

About Us

We are looking for a scientifically grounded Data Scientist to join our Decision Science team, which focuses on two pillars: Operations Intelligence and Customer Intelligence. You will develop robust statistical, mathematical, and machine learning solutions across one of Europe’s largest omnichannel retailers - from optimizing forecasting, inventory, supply chains, pricing, and store operations to improving customer experience, personalization, marketing, and digital commerce.

Our philosophy is to choose the right model for the problem - not the most fashionable technology. We value scientific rigor, meaningful baselines, transparent assumptions, and solutions that balance accuracy, interpretability, and complexity.

You will work closely with business stakeholders, product managers, data engineers, and analytics teams to translate business challenges into scalable AI products that are deployed on Google Cloud Platform (GCP).

Our best solutions arise when diverse perspectives come together. Diversity is key to achieving our vision of becoming the Experience Champion in Consumer Electronics. We value diversity, promote equal opportunities, and foster inclusion -join our team!

Job Infos

Location:Ingolstadt

MediaMarktSaturn Retail Group

Department:HQ - Priorization Management & CDO

Entrylevel:Professional Level

Type of Employement:Full Time

Working Hours:37,5

Persona:Job Requisition HQ Employee