Your tasks

• Be responsible for the entire ML lifecycle end-to-end – from data analysis & feature engineering to modeling, deployment & monitoring
• Develop machine learning models (e.g., DLMs/GBMs, probabilistic forecasting, recommender, NLP) as well as generative AI solutions (RAG, tool/prompt design, agents) including offline and online evaluation (e.g., A/B tests)
• Design Azure Lakehouse architectures and build efficient pipelines for model training and deployment
• Work closely with departments such as marketing, e-commerce, logistics, and customer service to make business value measurable
• Take on technical responsibility through design decisions, code reviews, technical guidance, and leading initiatives
• Document solutions in a comprehensible manner and implement requirements from evaluation, safety, and the AI Act (e.g., use case classification, risk controls)

Your profile

• Completed studies (computer science, mathematics, data science, or similar) and several years of experience in ML/AI projects
• Very good Python skills (pandas/numpy, scikit-learn) and experience with PyTorch or TensorFlow
• Experience in deploying models to production (APIs, batch jobs, pipelines) and in evaluation/experiments (e.g., MLflow, A/B tests)
• Solid knowledge of statistics/validation (uncertainties, leakage, bias)
• Architecture experience (e.g., feature store, model serving, vector DB/RAG)
• You communicate confidently, see yourself as a team player, and feel comfortable in a cross-functional context
• Good knowledge of German and English

Our Benefits - for your best time on the job!

• At our company, you'll find short communication paths, a company-wide informal culture, and numerous opportunities for co-creation and personal as well as professional development - all of which embody the Witt Spirit !
• Flexible working hours, time tracking, flexitime, and mobile office options allow you to optimize your workday perfectly for your performance.
• Work independently or with your colleagues wherever suits you best: in a co-working space, a collaboration corner, or even on our rooftop terrace when the weather is nice. Discover our work environments here.
• Want to work abroad? No problem! With our workation offer, you can work up to 30 days a year in European countries.
• Experience team spirit through our company sports offerings while also doing something good for your health.
• Benefit not only from the Witt Group but also from the Otto Group—whether it's discounted staff sales at many corporate companies or enriching knowledge transfer.
• Become part of the Witt team and discover what else we have to offer! Spoiler: Our cafeteria team ensures a varied lunch break.

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