Santander () 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. 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.

Full Stack

Engineer based in Madrid 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?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.

Deliver cloud?native solutions on AWS using containers, serverless, and event?Apply strong engineering practices across testing, security, observability, CI/CD, reliability, and cost. 5+ years in full stack, backend, cloud, platform, or AI engineering. (grade distributed systems, APIs, or cloud applications.



(BSc or MSc in Computer Science, Software Engineering, or a related field, or equivalent practical experience. (Spanish proficiency. (High level of English. (Strong Python skills and experience with FastAPI, Django, or Flask. (Experience with React, TypeScript, JavaScript, HTML, and CSS. (Strong knowledge of APIs, microservices, distributed systems, security, testing, CI/CD, and observability. (Hands?on AWS, Docker, Kubernetes, and infrastructure?as?code experience. (Experience with relational, document, vector, graph, or search databases. (Pragmatic judgment balancing speed, quality, security, reliability, and cost. Your contribution matters, and it's recognized. We enable our teams to go beyond through global opportunities and broad career paths.

Enjoy a hybrid working models—some days remote, some days onsite with your team—along with versátil hours. Access hundreds of courses on our platforms, including exclusive access to our global learning space: Receive a highly competitive salary with performance?Benefit from preferential banking terms, special interest rates on loans, life insurance, and more.

Through

BeHealthy, our global wellness programme, we promote Holistic wellbeing. friendly programmes tailored to each life stage. Get access to Santander Contigo, our programme for employees and their families offering legal, emotional, and administrative advisory services. Extra benefits.

The personal data you provide as well as any data generated during the selection process are confidential and will be processed by Open Digital Services, S.L. with registered office at Plaza de Santa Bárbara 2, * (Madrid), Madrid, Spain for the sole purpose of managing your participation in the selection processes and, where appropriate, to formalise your recruitment. For further information about your rights and data protection, please read the Open Digital Services Privacy Policy applicable to this type of data processing. LOCAL COMPLIANCE

📌 Full Stack Developer (Hybrid/Remote) (Madrid)
🏢 Santander
📍 Madrid