ML/AI Engineer in Barcelona

We’re seeking an ML/AI Engineer who’s excited by the opportunity to turn data into action and help shape the future of AI-driven products in a dynamic environment. You'll work on a mix of mature machine learning systems and emerging areas such as Generative AI, RAG, and agentic AI, as we begin to explore their potential to support internal tools and user-facing features.

This role offers a chance to deploy ML models in a production-ready ML system and also be part of the team that is starting to experiment and trying to integrate next-generation AI capabilities into our ecosystem. You’ll work alongside ML practitioners while having space to explore, prototype, and learn.

What you'll do

• Deploy machine learning models that support game features, player experience, and operational efficiency.

• Enhance the code quality of others' work by refining SQL and Python scripts for data transformation, feature engineering, modelling pipelines, and AI app, thereby ensuring production readiness.

• Explore and contribute to early-stage projects involving LLMs, RAG systems, and agentic AI to power new types of automation and decision support.

• Develop or refine Streamlit-based tools (or alike), that present ML/AI capabilities to non-technical users via intuitive and interactive interfaces.

• Help design and implement model monitoring systems to ensure long-term performance and business alignment.

• Collaborate with teams across product, data, and engineering to identify where ML and AI can bring value.

• Communicate results, limitations, and recommendations clearly across technical and business collaborators.

What we're looking for

• 5+ years of experience applying machine learning to real-world problems, from data to deployment.

• Strong Python skills and hands-on experience with ML Python libraries.

• Solid SQL expertise and experience working with large data warehouses.

• Comfort working with cloud platforms (e.g., GCP, AWS, Azure), Docker, and Airflow.

• Ability to build simple user interfaces (e.g., Streamlit) to expose ML models or AI applications to wider teams.

• Hands-on experience building applications with Generative AI (LLMs), including API integration.

• Interest or early experience in RAG systems—whether through prototypes, side projects, or professional work.

• Interest or familiarity with agentic AI concepts or frameworks (e.g., LangChain agents, CrewAI,..) is a plus, but not a must.

• Curiosity, initiative, and a desire to learn and grow in a fast-evolving space.

• Degree in a relevant technical field or equivalent experience.

Why Aristocrat?

Aristocrat is a world leader in gaming content and technology, and a top-tier publisher of free-to-play mobile games. We deliver great performance for our B2B customers and bring joy to the lives of the millions of people who love to play our casino and mobile games. And while we focus on fun, we never forget our responsibilities. We strive to lead the way in responsible gameplay, and to lift the bar in company governance, employee wellbeing and sustainability. We’re a diverse business united by shared values and an inspiring mission to bring joy to life through the power of play.

We aim to create an environment where individual differences are valued, and all employees have the opportunity to realize their potential. We welcome and encourage applications from all people regardless of age, gender, race, ethnicity, cultural background, disability status or LGBTQ+ identity. EEO M/F/D/V

• World Leader in Gaming Entertainment

• Robust benefits package

• Global career opportunities

Our Values

• All about the Player

• Talent Unleashed

• Collective Brilliance

• Good Business Good Citizen

Travel Expectations

Additional Information

Depending on the nature of your role, you may be required to register with the Nevada Gaming Control Board (NGCB) and/or other gaming jurisdictions in which we operate.