# Full Stack Engineer - Knowledge Base Team at Santander

Santander is hiring a Full Stack Engineer - Knowledge Base Team. Level rates it Builds AI ●●●●; you can [apply on Santander](https://jobsbylevel.com/go/83f2b3a2-ef7c-461b-9998-fac731efa008?utm_medium=ai-agent).

AI Level 4, AI centrality 82 out of 100. Location unknown.

## Details

- Company: [Santander](https://jobsbylevel.com/companies/santander)
- AI level: AI Level 4 (score 82 out of 100)
- Location: Location unknown
- Posted: October 22, 2026
- Apply: https://jobsbylevel.com/go/83f2b3a2-ef7c-461b-9998-fac731efa008?utm_medium=ai-agent
- Free CV review for this job: https://jobsbylevel.com/cv-review?job=full-stack-engineer-knowledge-base-team-at-santander-07beca

## Prepare for this job

The job page lists 5 likely interview questions for this offer, with a CV checklist: https://jobsbylevel.com/jobs/full-stack-engineer-knowledge-base-team-at-santander-07beca

## Description

Full Stack Engineer - Knowledge Base Team Country: IT STARTS HERE 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. THE DIFFERENCE YOU MAKE CDAIO / AI TECH is looking for a Full Stack Engineer based in Madri d to join the Knowledge Base team . You will build and operate secure, scalable applications, APIs, and user experiences that transform enterprise data into trusted knowledge for RAG, GraphRAG, semantic search, and AI agents . Working with AI, Data, Cloud, DevOps, Product, and Security teams, you will deliver production-grade capabilities at enterprise scale. Key responsibilities: Design and build full stack applications, backend services, APIs, and web interfaces for the Knowledge Base Platform. Develop data-to-knowledge workflows covering ingestion, chunking, embeddings, metadata, entities, relationships, retrieval, and validation. Build RAG and GraphRAG services combining vector search, graph traversal, reranking, grounding, and citations. Create secure integrations and tools for AI agents, including MCP-based interfaces. Deliver cloud-native solutions on AWS using containers, serverless, and event-driven patterns. Apply strong engineering practices across testing, security, observability, CI/CD, reliability, and cost. Collaborate across teams and contribute to technical design decisions and platform evolution. WHAT YOU'LL BRING Our people are our greatest strength. We value diverse perspectives and empower individuals to make an impact. Professional Experience 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) Education BSc or MSc in Computer Science, Software Engineering, or a related field, or equivalent practical experience. (Required) Languages Spanish proficiency. (Required) High level of English. (Preferred) Hard Skills 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.

The description is cut here. Read the full offer: https://jobsbylevel.com/jobs/full-stack-engineer-knowledge-base-team-at-santander-07beca

Source: https://jobsbylevel.com/jobs/full-stack-engineer-knowledge-base-team-at-santander-07beca

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