As a Senior Data Scientist – Tech Lead, you will take ownership of end-to-end delivery for complex, data-driven projects that combine multiple machine learning models and software components. You’ll lead technical design, architecture, and implementation for a key project within our Data Science organization, ensuring that our solutions deliver measurable business impact and technical excellence. You will act as the technical anchor for a small team (2–5 members), coordinating design, delivery, and quality across all project components, while mentoring junior data scientists and collaborating closely with product managers, engineers, and business stakeholders. This is a technical leadership role within a single complex project scope — focused on delivery excellence, technical decision-making, and fostering a high-performing team culture.
YOUR ROLE AT SIXT
YOUR SKILLS MATTER
Applied Machine Learning Expertise You bring 5+ years of experience in Data Science or Machine Learning, with a strong track record of delivering production-grade ML solutions across diverse domains.
Technical Leadership You have 1+ years of experience in a technical leadership role, guiding teams through end-to-end ML project lifecycles—from problem framing to deployment.
Modeling Mastery Proven ability to lead end-to-end machine learning projects from design to production.
Engineering Excellence Strong proficiency in Python and common ML frameworks (e.g., PyTorch, TensorFlow, scikit-learn). Experience designing and evaluating ML models using diverse metrics and validation strategies. Strong understanding of data pipelines, APIs, and productionization of ML systems.
Mentorship & Best Practices You’ve mentored junior team members and championed engineering best practices, fostering a culture of learning and technical excellence.
Communication & Collaboration You excel at translating complex technical concepts into clear business insights, and thrive in cross-functional environments with diverse stakeholders.
Preferred Qualifications Experience in cloud environments (AWS, GCP, Azure) and modern MLOps practices. Exposure to large-scale data systems, streaming data, or multi-model architectures.
WHAT WE OFFER
About us:
We are a globally leading mobility service provider with a revenue of €4.00 billion and around 9,000 employees worldwide. Our mobility platform ONE combines our products SIXT rent (car rental), SIXT share (car sharing), SIXT ride (taxi, ride, and chauffeur services), and SIXT+ (car subscription), giving our customers access to our fleet of 350,000 vehicles, the services of 4,000 cooperation partners, and around 5 million drivers worldwide. Together with our franchise partners, we are present in more than 110 countries at 2,000 rental stations. At SIXT, top-tier customer experience and outstanding customer service are our highest priorities. We believe in true entrepreneurship and long-term stability and align our corporate strategy with foresight. Get started with us and apply now!
Sixt SE with its registered office in Pullach near Munich, is a leading international provider of high-quality mobility services. With its products SIXT rent, SIXT share, SIXT ride and SIXT+ the company offers a uniquely integrated premium mobility service across the fields of vehicle and commercial vehicle rental, car sharing, ride hailing and car subscriptions. The products can be booked, among others, through the SIXT App, which also contains the services of its renowned mobility partners. SIXT has a presence in more than 100 countries around the globe. The company offers its customers experiences that inspire and exceed their expectations – through a lived culture of innovation, a consistent premium offering in terms of fleet and service, and an attractive price-performance ratio.
In 2024, SIXT achieved consolidated earnings before taxes of EUR 335.2 million and a significant increase in consolidated revenue to reach for the first time EUR 4.00 billion.
