Job
In this role, you design and implement advanced models and systems for personalized recommendations and analytics, while building robust pipelines for data processing and model monitoring.
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Job technologies
Your role in the team
- You architect and prototype advanced regression models (linear, GLM, mixed-effects, Gaussian Process) with a principled Bayesian approach, guiding pricing strategy at scale.
- You design and productionise personalisation and recommendation systems—two-tower retrieval, embedding-based candidate generation, learning-to-rank, and sequential/transformer models—with contextual bandits and off-policy evaluation to keep them learning from real interactions.
- You apply techniques like SVI, MCMC, and importance sampling to enable robust decision-making under uncertainty, even with sparse, high-volume, or streaming data.
- You build and maintain reproducible pipelines for feature engineering, label generation, and automated data validation using tools like Airflow or Dagster, ensuring high code quality and reliability.
- You deploy models via FastAPI, Docker, or Kubeflow, and establish real-time monitoring with Bayesian control charts and performance dashboards to catch drift and anomalies early.
- You design sophisticated A/B and multivariate tests, apply quasi-experimental and causal impact methods, and quantify the value of information to balance exploration and exploitation.
- You collaborate with product, revenue, and customer experience leaders to translate ambiguous ideas into testable hypotheses, while mentoring peers and advancing Bayesian practices through internal publications and workshops.
Our expectations of you
Qualifications
- Computing proficiency You have a well-stocked Bayesian toolbelt - fluent in PyMC, Stan, NumPyro, TFP, or similar - and are comfortable writing custom likelihoods and priors.
- Engineering practices You write solid, production-grade Python code and are familiar with type hints, testing frameworks, and CI/CD workflows.
- Stakeholder management You communicate uncertainty, lift, and risk in plain English for executives, while engaging deeply with scientists and engineers.
Experience
- Expertise You bring deep statistical chops, with 5+ years of applying regression, hierarchical models, or state-space methods in production.
- Modeling You have proven experience scaling inference using SVI, black-box VI, or advanced MCMC techniques on large datasets.
- Personalization (nice to have) You have experience with recommender and personalization stacks—two-tower / embedding retrieval, learning-to-rank, sequential models, contextual bandits—plus counterfactual or off-policy evaluation to prove incremental value rather than optimize click-through.
- Infrastructure You are hands-on with cloud platforms like AWS, GCP, or Azure, and have experience with containerization (Docker/K8s) and workflow orchestration.
What we offer
- Enjoy discounts on SIXT rent, share, ride and SIXT+, attractive vehicle leasing offers, and exclusive deals with partners for travel, tech, fashion and more.
- We support you with a monthly mobility allowance of €20 for even more freedom.
- We contribute to your retirement plan and support you with capital-forming benefits to ensure you are well covered.
- Stay active with our modern SIXT gym, a range of leisure activities such as the gaming area or the SIXT choir, and enjoy our high-quality employee restaurant.
- Enjoy 30 days of vacation and a hybrid working model with flexible hours.
- Take one day each year to volunteer at a charitable organization dedicated to supporting children.
Benefits
Health, fitness & fun
Work-Life-Integration
Food & drink
Higher take-home pay
Topics you will work on
Job locations
About your employer
Pullach, Stuttgart, Berlin, Rostock
Mobility means freedom. The freedom to experience the world and share it with others. That's why we, the SIXT family with more than 6,000 employees worldwide, question the status quo every day and work tirelessly to create a future where people all over the world have access to safe, efficient, and comfortable mobility at the push of a button.
- English
- Established Company
- Hybrid, Onsite
- Internet, IT, Telecommunication · Logistics, Transportation
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