Country: Spain

IT STARTS HERE

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.

THE DIFFERENCE YOU MAKE

We are seeking Senior Computational Linguistics Expert focus on LLM-based experiences, conversational design, linguistic quality, AI interaction strategy. You will lead the design and optimization of natural, safe, and effective conversational experiences across AI assistants, chatbots, and automated journeys. As a senior IC, you will apply deep linguistic expertise and UX thinking to shape how users interact with AI systems, guiding tone, structure, prompts, evaluation methods, and overall dialog quality.

Key Responsibilities

• Own the design of conversational flows for complex use cases involving LLMs and multimodal AI.

• Craft prompts, interaction patterns, instructions, and system behaviors that yield consistent, high-quality model responses.

• Conduct linguistic and UX evaluations to identify friction, ambiguity, or user-experience risks.

• Analyze behavioral data from conversations to drive iterative improvements.

• Define tone-of-voice standards, content governance rules, and best practices for AI communications.

• Partner with AI researchers, data scientists, engineers, and product owners to shape end-to-end AI journeys.

• Create and maintain high-quality training/evaluation datasets for conversational models.

• Act as a subject-matter expert in linguistics, language pragmatics, user intent, and human-AI interaction (without people management).

WHAT YOU'LL BRING TO THE TABLE

Our people are our greatest strength. Each individual brings unique perspectives that make us stronger as a team and as an organization. We're enabling teams to go above and beyond by valuing who they are and empowering what they bring to the table.

The following requirements represent the knowledge, skills, and abilities essential to success in this position. Reasonable accommodations can be made to enable people with disabilities to perform essential functions.

Education:

• Studies in Computational Linguistics, Philology, Applied Languages, or Similar Fields . (Required).

Professional experience

• Experience with multilingual conversational systems. (Required).

• Experience working in cross-functional agile environments. (Preferred).

Hard Skills

• Deep linguistic background (semantics, pragmatics, discourse, conversation analysis) OR proven conversational design experience. (Required).

• Strong experience designing conversational flows, scripts, or interaction patterns for chatbots, LLMs, or voice systems. (Required).

• Expertise in prompt engineering and evaluation of model output quality. (Required).

• Strong UX writing, microcopy, and content strategy skills. (Required).

• Ability to interpret conversational analytics and propose data-driven enhancements. (Required).

• Experience working in cross-functional agile environments. (Required).

• Familiarity with annotation frameworks and linguistic labeling methods. (Preferred).

• Exposure to safety, bias, and compliance reviews for AI systems. (Preferred).

• Understanding of financial-services communication requirements. (Preferred).

Soft skills

• Increased task-completion and satisfaction rates across AI touchpoints.

• Reduction in conversational friction, user confusion, and escalations.

• Higher consistency, quality, and safety across AI-generated interactions. (Required).

WE VALUE YOUR IMPACT

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.

LOCAL COMPLIANCE

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.

WHAT TO DO NEXT?

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

READY TO TAKE THE NEXT STEP ON YOUR JOURNEY?

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