Senior Data Scientist - AI Evaluation & Product

Senior Data Scientist - AI Evaluation & ProductCountry: Spain

We are seeking a Senior Data Scientist or Lead Data Scientist to drive the design and delivery of analytical frameworks, methodologies, and products focused on the evaluation and continuous improvement of AI systems.

The ideal candidate is a versatile and experienced Data Scientist who combines scientific rigor with a pragmatic product mindset. You will be comfortable going deep into technical problems, working across disciplines, and taking end-to-end responsibility for delivering meaningful outcomes in a dynamic environment.

• Lead Data Science initiatives end to end, from problem framing and prioritization through experimentation, implementation, deployment, and continuous improvement.
• Design methodologies, metrics, benchmarks, and testing strategies to evaluate the quality, performance, reliability, and behavior of AI systems.
• Apply statistical analysis, experimentation, machine learning, and advanced analytics to solve complex real-world problems.
• Translate business and user needs into clear analytical problems, technical requirements, and scalable solutions.
• Partner closely with Product, Engineering, Research, Validation, and Business teams to shape priorities, roadmaps, and delivery plans.
• Build high-quality analytical assets, prototypes, and production-oriented capabilities using sound software engineering and Data Science practices.
• Use data and evidence to generate actionable insights, support decisions, and identify opportunities for product and system improvement.
• Drive technical quality, reproducibility, testing, documentation, and maintainability across Data Science work.
• Navigate uncertainty, manage trade-offs, and proactively remove blockers to move initiatives forward.
• Mentor colleagues and provide technical guidance, contributing to a culture of scientific rigor, collaboration, and continuous learning.

Santander (www.santander.com) is evolving from a high-impact global brand to a technology-driven organization, and our people are at the heart of this journey. Together, we are driving a customer-centric transformation that values bold thinking, innovation, and the courage to challenge what's possible.

This is more than a strategic shift. It's an opportunity for motivated professionals to grow, learn, and make a real difference.

Our mission is to help people and businesses thrive. As part of the global AI Transformation team, you'll lead and manage strategic AI initiatives that drive impact across global companies and key functions. We are looking for someone who connects business, AI, and technology, ensuring that AI solutions create measurable value.

Santander's Data & AI Science (DAISci) team is the scientific engine of the bank's AI transformation. We develop, evaluate, validate, and translate advanced Data Science and AI methods into robust products and capabilities that create measurable value across the organization.

DAISci operates at the intersection of scientific depth, product innovation, and real-world delivery. We combine rigorous analysis with pragmatic execution to address complex challenges and build scalable, reliable, and production-ready solutions.

Joining DAISci is an opportunity to work on strategic initiatives that shape how AI systems are assessed, understood, and continuously improved. You will help define evaluation methodologies, analytical capabilities, and products that enable teams to make better evidence-based decisions.

This role will be a key driver of AI evaluation and product excellence, combining technical and scientific depth with versatility, strong ownership, and the ability to move complex initiatives from ambiguity to delivery.

Your contribution matters, and it's recognized. You can expect a fair and competitive rewards package that reflects the impact you create and the value you offer. But we know that rewards go beyond numbers.

• We enable our teams to go further through global opportunities and broad career paths.
• Flexibility that works. Enjoy hybrid work models-some days remote, some days in-person with your team-along with flexible schedules.
• Learning for life. Access hundreds of courses on our platforms, including exclusive access to our global learning space: Santander Open Academy (www.santanderopenacademy.com)
• Competitive rewards. Receive a very competitive salary with performance-based bonuses, which motivates you to continue growing with us.
• Economic advantages. Take advantage of preferential banking terms, special interest rates on loans, life insurance, and more.
• Your health is our priority. Through BeHealthy, our global wellness program, we promote holistic wellness.
• We know that family is everything. That's why we offer child care support and family programs tailored to every stage of life.
• Always by your side. Access Santander Contigo, our program for employees and their families that offers legal, emotional and administrative advice services.
• Extra benefits. Gym/WellHub membership, medical centers in some of our facilities, meal allowance, parking, shuttle service from various points in Madrid, as well as discounts and exclusive offers for Santander employees. And that's just the beginning-we'll tell you more when you join.

We're here to keep you motivated, help you reach your goals, and celebrate your progress every step of the way.

Santander is proud to be an organization where there are equal opportunities regardless of age, gender, disability, marital status, race, religion or sexual orientation. We are committed to providing an inclusive and accessible application process for all candidates.

If this sounds like a position you're interested in, apply.