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Santander

Global retail and commercial banking group

Senior Software Engineer | AI & Agentic Solutions

AI Application Engineering +1Posted on Nov 11
Full-timeArgentinaNo salary listed

About the Job

Requirements

  • Solid experience developing backend software and taking end-to-end solutions from design through production is required.
  • Practical experience with Python and Node.js, and FastAPI or equivalent frameworks is required.
  • Experience designing and integrating REST APIs and microservice architectures is required.
  • Experience with Git/GitLab, CI/CD, automated testing, observability, and software quality is required.
  • Knowledge of SQL and NoSQL databases, containers, and modern deployment processes is required.
  • Experience developing solutions on AWS is required.
  • Clear communication with technical and non-technical stakeholders.
  • Proactivity, autonomy, curiosity, and willingness to learn and grow.
  • Ownership of solutions from ideation through operation and evolution.
  • Critical thinking to understand problems, question assumptions, and propose alternatives.
  • Collaboration, active listening, and ability to share knowledge and strengthen the team.
  • Product, impact, and continuous-improvement orientation in complex, multidisciplinary environments.

Responsibilities

  • Design and develop Generative AI solutions, virtual assistants, and agentic architectures.
  • Build backend components and services using Python, Node.js, TypeScript, FastAPI, APIs, and microservice architectures.
  • Design workflows in which agents reason, use tools, consume APIs, and interact with enterprise systems with appropriate controls.
  • Implement solutions using LLMs, RAG, prompt engineering, context management, MCP, and agent orchestration with Strands, LangGraph, LangChain, LlamaIndex, or equivalent technologies.
  • Design integrations among agents, APIs, cloud platforms, data, and internal services, and participate in architecture decisions, code reviews, and integration strategy.
  • Work closely with Product, UX, QA, Architecture, Security, Infrastructure, and other technology teams.
  • Ensure quality, observability, performance, scalability, security, maintainability, and operability, incorporating automated testing and modern engineering practices.
  • Participate in the end-to-end lifecycle, communicate decisions and trade-offs, and identify risks and technical debt before they become problems.

Desired Qualifications

  • Practical experience with Generative AI solutions, virtual assistants, RAG, or agentic systems in production environments.
  • University or tertiary education in Systems, Computer Science, Software Engineering, Computer Science, or related disciplines; equivalent experience, technical training, and demonstrable continuous learning are also valued.
  • Technical English for understanding documentation, collaborating, and working in global contexts.
  • Knowledge of LLMs, Generative AI, RAG, prompt engineering, and context management.
  • Knowledge of Agentic AI, multi-agent systems, tool/function calling, MCP, and agent orchestration.
  • Experience with Strands, LangGraph, LangChain, LlamaIndex, or equivalent frameworks.
  • Experience with AWS Bedrock, Knowledge Bases, Agents for Bedrock, Lambda, API Gateway, EventBridge, or DynamoDB.
  • Knowledge of guardrails, evaluation, monitoring, tracing, and debugging for LLM-based applications.

About the Company

Santander

Global retail and commercial banking group

Santander is a global bank focusing on retail and commercial banking in Europe and the Americas, serving individuals and SMEs with regional franchises and a broad consumer finance arm, plus a Corporate & Investment Banking division for multinational clients. It uses its Gravity cloud platform to migrate core banking and rapidly deploy digital services such as Openbank across markets, combining fintech-style agility with a bank's balance sheet. The bank differentiates itself by marrying a large retail footprint with global CIB capabilities under the One Santander verticals model to boost efficiency and cross-border revenue. Its goals include improving returns on tangible equity and financing the green economy through sustainable finance and renewable energy projects.

Company size
10,001+
Company stage
IPO
Headquarters
Boadilla del Monte, Spain
Founded
1902

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