Job Closed
This listing is no longer active.
SIXT is a leading international provider of high-quality mobility services.
Senior Data Scientist, Fleet Optimization
Location
Portugal
Posted
156 days ago
Salary
0
Seniority
Senior
Job Description
Senior Data Scientist, Fleet Optimization
SIXT
• Lead the data science efforts behind planning and optimizing SIXT’s rental car fleet • Guide and mentor a team of 2-3 data scientists to deliver high-impact solutions • Act as a trusted advisor to stakeholders, helping them leverage data for strategic decision-making • Develop explainable long-term demand forecasts that drive fleet planning and investment strategies • Build optimization and simulation models to support data-driven fleet steering decisions • Collaborate with cross-functional teams to bring solutions to production
Job Requirements
- Strong track record in Data Science, Machine Learning, and Advanced Optimization techniques
- Expertise in Revenue Management or Operations Research is a bonus
- Proficient in Python and cloud-based ecosystems, preferably AWS
- Hands-on experience deploying, monitoring, and maintaining machine learning models in real-world environments
- Passion for Decision Intelligence, AI-driven solutions, and solving complex, high-impact business challenges
- Excellent stakeholder engagement and data storytelling skills
- Fluent in English
Benefits
- Enjoy 28 days of vacation, an additional day off for your birthday, and 1 volunteer day per year
- Benefit from a hybrid working model, flexible working hours, and no dress code
- Access discounts on SIXT rent, share, ride, and SIXT+, along with partner discounts
- Participate in training programs, external conferences, and internal dev & tech talks designed for your personal growth and development
- Private health insurance to support your well-being
- Enjoy the Coverflex advantage system to enhance your employee experience
Related Guides
Related Categories
Related Job Pages
More Data Scientist Jobs
Senior Data Science Manager, AI Products
DropboxDropbox is the one place to keep life organized and keep work moving.
• Manage and scale a high performing team of data scientists • Coach and mentor data scientists of varying experiences to ensure their continued growth • Plan, execute, and deliver a portfolio of mission-critical data science projects for Dash Experience, and provide technical leadership in a fast-paced environment • Leverage data-driven insights to proactively identify most impactful opportunities, and directly influence product roadmaps and strategies • Translate complex data insights into implications and recommendations for the business via excellent communication skills, both verbal and written • Work with cross-functional teams (including Product, Engineering, Design, User Research, and senior executives) to rapidly execute and iterate • Partner with Product Engineers and Data Engineers to build the reliable, efficient, and scalable data foundations, tools, and processes to drive our AI/ML capabilities’ long-term growth • Identify what matters most and prioritize ruthlessly
• Develop scalable pipelines for text ingestion, cleaning, normalization, and tokenization to support downstream applications. • Architect and maintain robust indexing systems and vector databases for semantic search and retrieval. • Create reusable prompting strategies and lead fine-tuning initiatives for LLMs tailored to business-specific tasks. • Construct dynamic knowledge systems and agentic workflows using LangChain and LangGraph. • Apply VRAG and GraphRAG design patterns to enrich information retrieval and contextual understanding. • Perform benchmark testing and model evaluations to improve accuracy, efficiency, and scalability of NLP systems. • Work closely with engineering, product, and research stakeholders to deliver integrated AI-driven features. • Mentor junior data scientists, guide best practices, and drive innovation across AI projects.
Staff Data Scientist
ToastWe empower the restaurant community to delight guests, do what they love, and thrive.
• Lead the design and development of scalable ML systems for use cases such as menu recommendation, demand forecasting, offer targeting, and guest personalization. • Own the full machine learning lifecycle—from problem framing and data exploration to modeling, deployment, and monitoring—for mission-critical initiatives. • Design and implement advanced ML and statistical models that improve product performance, operational efficiency, or customer insights. • Collaborate with engineers, product managers, and business stakeholders to define project scope, success metrics, and integration strategy. • Guide architectural decisions, set modeling standards, and champion best practices for experimentation, validation, and productionization. • Mentor other data scientists and raise the technical bar through design reviews, feedback, and sharing domain expertise. • Proactively identify areas where data science can create business value and lead cross-functional efforts to drive those opportunities forward.
• Contribute to the development and continuous improvement of data infrastructure for clinical studies and real-world data sources. • Lead the research, prototyping, and development of machine learning and AI models aligned to business needs. • Oversee the production and review of tables, figures, and listings, interpret results, and proactively address limitations in study design or statistical methods. • Provide statistical consultation and thought leadership to cross-functional partners in R&D, engineering, marketing, manufacturing, medical science, and with external collaborators.




