Python Machine Learning Engineer (Hybrid - Madrid)

A passionate Machine Learning Engineer with experience in Generative AI, Large Language Models (LLMs), AI Agents, and MLOps/DevOps environments, eager to help design, build, and deploy enterprise-grade AI solutions.

Required to go to the client's offices in central Madrid 3 days a week.

High english level is required.

• Bachelor's or Master's degree in Computer Science, Data Science, Mathematics, Statistics, or a related field.
• Strong programming skills in Python.
• Hands-on experience with Machine Learning frameworks such as TensorFlow and/or PyTorch.
• Proven experience working with Large Language Models (LLMs).
• Solid understanding of AI Agents, agentic workflows, orchestration frameworks, and reasoning patterns.
• Experience designing and implementing RAG architectures.
• Knowledge of data preprocessing, feature engineering, model selection, and evaluation techniques.
• Strong understanding of statistics, probability, linear algebra, and optimization concepts.
• Experience applying software engineering best practices, including version control, testing, and documentation.
• English C1

• Experience working in cloud environments (Azure, AWS, or GCP).
• Knowledge of MLOps and CI/CD practices.
• Experience deploying and monitoring AI solutions in production.
• Background in financial services, banking, or wealth management.
• Familiarity with vector databases and modern GenAI ecosystems.

- 23 days of Annual Leave plus the 24th and 31st of December as discretionary days!

- Numerous benefits (Heath Care Plan, Internet Connectivity, Life and Accident Insurances).

- `Retribución Flexible´ Program: (Meals, Kinder Garden, Transport, online English lessons, Heath Care Plan...)

- Free access to several training platforms

- Professional stability and career plans

- UST also, compensates referrals from which you could benefit when you refer professionals.

- The option to pick between 12 or 14 payments along the year.

- Real Work Life Balance measures (flexibility, WFH or remote work policy, compacted hours during summertime...)

- UST Club Platform discounts and gym Access discounts

We are still looking for the very Top Talent...and we would be delighted if you were to join our team!

• Develop, deploy, and optimize Machine Learning and AI solutions for complex business challenges.
• Design and implement multi-agent systems and enable AI models with function/tool-calling capabilities.
• Build and maintain Retrieval-Augmented Generation (RAG) solutions using enterprise data.
• Evaluate, integrate, and optimize AI models, including Large Language Models (LLMs).
• Design and improve agentic workflows and AI agents for production environments.
• Test and optimize prompts and few-shot examples to ensure accurate, consistent, and safe AI outputs.
• Evaluate model performance using appropriate metrics, benchmarks, and validation techniques.
• Collaborate with Data Scientists, Data Engineers, Platform Teams, and other stakeholders.
• Participate in code reviews, testing, debugging, and quality assurance activities.
• Contribute to the full AI lifecycle, from design and development to deployment and monitoring.