We are seeking a passionate Senior Data Scientist (d/f/m) to join our central Data Science team based in Berlin! Our team’s mission is to deliver data-driven insights and machine learning (ML) solutions that enhance user experiences and drive value across our platforms, with a particular focus on search and ranking tools. We offer a flexible working environment with in-person presence expected once/twice a week, or as required for key product appointments.

About the Role

As a Senior Data Scientist, you will:

• Lead impactful projects that apply data science and advanced ML models to complex business problems, especially around search, ranking, recommendation, and personalization.

• Own end-to-end data science initiatives: from ideation and prototyping, to production deployment, performance monitoring, and refining for scalability and efficiency.

• Analyze large and complex datasets to uncover actionable insights that inform business strategies and drive user-centric solutions.

• Build and validate proof-of-concepts for innovative features, clearly presenting results and value to diverse stakeholders.

• Act as a bridge between technical and non-technical teams, communicating insights, methodologies, and outcomes effectively.

• Collaborate closely with product managers, UX designers, engineers, and other data scientists to align on search and platform goals and drive cross-functional product development.

• Mentor and support junior data scientists, promoting best practices and continuous team growth.

• Stay current with the latest advancements in data science, integrating new tools, frameworks, or techniques to push the team’s capabilities forward.

What You Bring

• Relevant MSc or Ph.D. in statistics, computer science, economics, or a related field.

• 3+ years of hands-on experience in designing, training, and deploying machine learning models, ideally within marketplaces or technology-driven environments.

• Advanced programming skills in Python (preferred), R, and proficiency working with SQL and/or NoSQL databases.

• Strong background in machine learning frameworks (e.g., TensorFlow, PyTorch, Scikit-learn) and experience with MLOps best practices.

• Proven track record with cloud platforms, especially GCP or AWS, including deploying and managing ML solutions in production environments.

• Experience guiding cross-functional team efforts and managing a variety of stakeholders.

• Confidence in translating complex business needs into data-driven strategies and communicating findings to technical and non-technical audiences.

• Enthusiasm for agile software development (Kanban/Scrum), product discovery, and iterative, continuous deployment.

• Excellent English language communication skills, both written and verbal.

• Passion for innovation, continuous learning, and making a real impact on how millions interact with our platform.

Additional information

• Recharge with 28 days of paid time off.
• Stay mobile with a €50 monthly transportation/mobility allowance.
• Keep growing with a development budget and access to coaching.
• Family first - enjoy up to 12 (non-birth parent) or 20 (birth parent) weeks of fully paid parental leave.
• Learn anytime, anywhere with our online and offline library.
• Get rewarded with an attractive base salary and participation in our annual incentive plans.
• Work from anywhere - up to 20 days per year from wherever you feel most productive.
• Prioritize your well-being with a 24/7 Employee Assistance Programme for you and your immediate family.

Company description

Founded in 1996, mobile.de disrupted the status quo of buying and selling cars as the first online vehicle marketplace.

Today, we are Germany’s largest vehicle marketplace with around 1.4 million listed cars, commercial vehicles, motorcycles and e-bikes. Both private customers and more than 40,000 registered vehicle dealers use the platform and benefit from 108 million customer visits per month. As a "one-stop shop”, mobile.de’s offering includes financing and leasing solutions in addition to buying and selling – and we will not stop innovating. If you are driven by an eagerness to learn and a passion for collaboration then we should get to know each other.

mobile.de is an equal opportunity employer and we value diversity. We do not discriminate on the basis of race, religion, colour, national origin, gender, sexual orientation, age, marital status or disability status.

If you feel like you don’t meet all of the requirements for this role but are interested, please consider applying anyway. We strongly encourage people from historically excluded groups to apply.

What we offer

Meaningful Work: We are a diverse, international, highly skilled and passionate team committed to a world where people share more and waste less. Every day you will have the opportunity to make a huge difference for our users, customers as well as shape the future.

Embracing AI: We’re at the forefront of integrating cutting-edge AI technologies into our operations. Being part of mobile.de you will work with and learn about AI tools, contributing to projects that leverage AI to enhance efficiency, improve customer experiences, and drive our mission forward. With an AI-first mindset, we foster a culture of continuous learning and experimentation, empowering our team to explore and apply AI in meaningful ways for the company and themselves.

Growth and Development: We are a global organisation who truly believes in growing our people. To support this we offer lots of development and training opportunities and provide a budget for our team members.

Connection and Inclusion: Our culture is the glue that holds us together. We believe in making meaningful connections and creating an inclusive atmosphere with lots of opportunities to connect both in your day to day work and through social team activities (online and offline).