Gen AI Engineer

Description

The company is a large bank moving from a global brand to a technology-driven organisation, with a transformation that touches its whole business.

The role sits in the Agentic Solutions team within the Chief Data & Artificial Intelligence Officer division, under AI TECH. You will be a Generative AI Engineer working in Python, based in Madrid.

The division is building an AI and Data team for a bank serving more than 170 million people worldwide. The work is part of one of the most significant technology projects in the financial sector.

Responsibilities

• Design reasoning and planning loops, short- and long-term memory, and context management for single agents and multi-agent systems that collaborate.
• Connect large language models (LLMs) to APIs, microservices, and vector databases, and coordinate agentic systems using MCP and A2A.
• Build and tune advanced retrieval-augmented generation (RAG) pipelines so agent answers rest on relevant knowledge.
• Set metrics for agent behaviour, and add tracing, debugging, and production monitoring.
• Add security filters, access controls, data leakage prevention, and defences against prompt injection.
• Build MCP-based tools that expand what agentic systems can do.

Requirements

• At least 5 years of backend development experience.
• At least 2 years of AI engineering experience.
• Experience building and running production-grade distributed systems, APIs, or cloud applications.
• Hands-on experience with LLM applications.
• A BSc or MSc in Computer Science, Engineering, or a related technical field.
• Spanish proficiency.
• Strong knowledge of software architecture, engineering best practices, and design patterns.
• Strong knowledge of APIs, microservices, distributed systems, security, testing, CI/CD, and observability.
• Strong Python skills.
• Experience optimising production applications. Preferred.
• Knowledge of RAG pipelines, embeddings, vector search, reranking, response grounding, and evaluation. Preferred.
• Experience with React, TypeScript, JavaScript, HTML, and CSS. Preferred.
• Knowledge of agent integration and interaction protocols, including MCP, A2A, AG-UI, and A2UI. Preferred.
• High level of English. Preferred.
• Strong problem-solving skills, a strong sense of ownership, and a proactive attitude.
• Clear communication, including leading technical discussions and working well with both technical and non-technical stakeholders.
• The company will consider reasonable accommodations for candidates with disabilities to perform the essential functions of the role.

Conditions

Hybrid working: some days remote and some days onsite with your team, plus flexible hours.

Competitive salary with performance-based bonuses.

The company treats the role as a fair, competitive reward package tied to the impact you deliver.

Equal opportunity regardless of age, gender, disability, civil status, race, religion, or sexual orientation.

Personal data from the selection process is handled by Open Digital Services, S.L., Plaza de Santa Bárbara 2, 28004 Madrid, Spain, solely to manage your application and any recruitment.

Benefits

• Hundreds of courses on the company's learning platforms, including access to the company Open Academy global learning space.
• Preferential banking terms, special loan interest rates, and life insurance.
• BeHealthy global wellness programme for holistic wellbeing.
• Childcare support and family-friendly programmes for each life stage.
• The company Contigo programme for employees and families, offering legal, emotional, and administrative advice.
• Gym or WellHub membership, medical centres at some sites, meal subsidy, parking, shuttle service from several points in Madrid, and discounts for employees.
• Global opportunities and broad career paths.