Full Stack Engineer - Knowledge Base Team

Santander (www.santander.com) is evolving from a global, high-impact brand into 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 a chance for driven professionals to grow, learn, and make a real difference.

Our mission is to contribute to help more people and businesses prosper. We embrace a strong risk culture and all our professionals at all levels are expected to take a proactive and responsible approach toward risk management.

Our Chief Data & Artificial Intelligence Officer (CDAIO) division is building a world-class AI & Data team to make a difference in the lives of over 170 million people worldwide, through one of the largest banks in the world.

We are undergoing one of the biggest transformations in our history and technology is at the heart of our strategy. Join our team to play a part in one of the most important technological projects for the financial sector in the world.

Our mission is to contribute to helping more people and businesses prosper. We embrace a strong risk culture and all our professionals at all levels are expected to take a proactive and responsible approach toward risk management. 

Our people are our greatest strength. We value diverse perspectives and empower individuals to make an impact.

• 5+ years in full stack, backend, cloud, platform, or AI engineering. (Required)
• Experience building and operating production-grade distributed systems, APIs, or cloud applications. (Required)
• Hands-on experience with LLM applications, RAG, semantic search, or intelligent automation. (Required)
• Experience in a regulated enterprise environment. (Preferred)

• BSc or MSc in Computer Science, Software Engineering, or a related field, or equivalent practical experience. (Required)

• Spanish proficiency. (Required)
• High level of English. (Preferred)

• Strong Python skills and experience with FastAPI, Django, or Flask. (Required)
• Experience with React, TypeScript, JavaScript, HTML, and CSS. (Required)
• Strong knowledge of APIs, microservices, distributed systems, security, testing, CI/CD, and observability. (Required)
• Hands-on AWS, Docker, Kubernetes, and infrastructure-as-code experience. (Required)
• Knowledge of RAG, embeddings, vector search, reranking, grounding, and evaluation. (Required)
• Experience with relational, document, vector, graph, or search databases. (Required)
• Knowledge of knowledge graphs, GraphRAG, agent frameworks, Amazon Bedrock, or MCP. (Preferred)

• Strong problem-solving, ownership, and end-to-end delivery skills.
• Clear communication and effective collaboration with technical and non-technical stakeholders.
• Pragmatic judgment balancing speed, quality, security, reliability, and cost.

If this sounds like a role you are interested in, then please apply.