This job is with Aristocrat, an inclusive employer and a member of myGwork – the largest general platform for the LGBTQ+ business community. Join Aristocrat, a leading force in the mobile gaming industry, where innovation meets passion! We are dedicated to crafting outstanding gaming experiences and using data to drive strategic business decisions. By joining our collaborative and innovative team, you will have the opportunity to build the future of mobile gaming with your expertise in machine learning and AI.
As an ML Engineer at Aristocrat, you will be key in creating and applying machine learning and AI solutions that boost personalized player experiences and business results. This role provides an outstanding chance to work where machine learning, software engineering, and AI application development meet.
Build, train, evaluate, and improve machine learning models for prediction, recommendation, personalization, and decision support.
Develop LLM-powered applications and workflows, including on-demand input engineering, retrieval-augmented generation (RAG), and tool integration.
Produce software parts, services, and APIs that add machine learning and AI functionality to existing applications.
Analyze model performance, verify AI outputs, detect failure modes, and assist in evaluation and testing frameworks.
Support production deployment: Work alongside MLOps Engineers to deploy, monitor, and maintain ML/AI solutions in production environments.
Apply engineering guidelines: Write clean, maintainable Python code, implement automated tests, participate in code reviews, and maintain technical documentation.
Work with complex data: Retrieve, integrate, validate, and prepare datasets from multiple sources for model training, inference, and evaluation.
Examine technical problems, improve model performance, and support advancements in reliability and efficiency.
Work with Data Scientists, engineers, and product collaborators to understand requirements and deliver practical ML/AI solutions.




Continuously acquire new ML/AI technologies, share knowledge, and contribute to engineering discussions and team practices.
Education: BSc, MSc, or PhD in Computer Science, Machine Learning, Artificial Intelligence, Mathematics, or a related technical field, or equivalent experience in practice.
Experience: 2+ years of professional experience in software engineering, machine learning engineering, or AI development, with practical experience developing ML models or AI-powered applications.
Software engineering: Strong Python programming skills, including software build, testing, debugging, version control, and collaborative development practices.
Machine learning: Hands-on experience developing, training, and evaluating supervised learning models using frameworks such as scikit-learn, PyTorch, TensorFlow, or similar.
Understanding of model evaluation methodologies, performance metrics, and approaches to validating AI outputs.
Data processing: Strong SQL skills and experience retrieving, transforming, and validating data from analytical databases and APIs.
Production ML: Familiarity with model deployment, inference services, monitoring, and ML lifecycle management.
Cloud & infrastructure: Working knowledge of cloud platforms (e.g., GCP, AWS, Azure), containers, CI/CD pipelines, and ML development environments.
Experience in mobile gaming, digital entertainment, or large-scale consumer applications.
Experience with model serving, distributed computing, or performance optimization.
CV Language: Please submit your CV in English.
Hybrid Working Policy: This role follows a hybrid working model, requiring attendance at our Barcelona office 3 days per week.
All final content, role requirements and hiring decisions remain subject to human review and approval by Aristocrat.
Our approach is underpinned by a pay-for-performance belief in rewarding individual impact. Depending on your role and location, you may be eligible for annual bonuses and incentives, health and wellbeing benefits, paid time off, retirement plans, insurance coverage, and other local or statutory benefits.

📌 Machine Learning Engineer praca zdalna (Barcelona)
🏢 Aristocrat
📍 Barcelona