{"id":3691674,"url":"https://alion.io/job/aristocrat-leisure-ml-engineer-2","title":"ML Engineer","company":{"id":8402,"name":"Aristocrat Leisure","domain":"aristocrat.com","url":"https://alion.io/company/aristocrat","size_band":"5000+","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workday","truth_index":{"grade":"A","score":87,"open_postings":22,"ghost_share":0,"stale_share":0.409,"repost_share":0.182,"time_to_fill_p50_days":36,"computed_at":"2026-11-06T05:58:05Z"}},"role":"AI/ML","role_family":"AI/ML","seniority":"junior","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Barcelona, Spain"],"countries":["ES"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":2,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AWS","optional":false},{"name":"Azure","optional":false},{"name":"CI/CD","optional":false},{"name":"Function Calling","optional":false},{"name":"GCP","optional":false},{"name":"LLM","optional":false},{"name":"Machine Learning","optional":false},{"name":"Python","optional":false},{"name":"PyTorch","optional":false},{"name":"RAG","optional":false},{"name":"Recommender Systems","optional":false},{"name":"Reinforcement Learning","optional":false},{"name":"Scikit-learn","optional":false},{"name":"SQL","optional":false},{"name":"Structured Outputs","optional":false},{"name":"TensorFlow","optional":false},{"name":"Time Series","optional":false},{"name":"Agentic Workflows","optional":true},{"name":"AI Agents","optional":true},{"name":"Vertex AI","optional":true}],"status":"live","first_seen_at":"2026-11-03T16:46:32Z","employer_posted_date":"2026-11-03","last_verified_at":"2026-11-06T15:18:59Z","board_verified":true,"closed_at":null,"days_open":2,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":2},"description":"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.\nAs 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.\nWhat You'll Do\nDevelop ML solutions: Build, train, evaluate, and improve machine learning models for prediction, recommendation, personalization, and decision support.\nBuild AI applications: Develop LLM-powered applications and workflows, including on-demand input engineering, retrieval-augmented generation (RAG), and tool integration.\nConstruct ML/AI components: Produce software parts, services, and APIs that add machine learning and AI functionality to existing applications.\nEvaluate ML and AI systems: Analyze model performance, verify AI outputs, detect failure modes, and assist in evaluation and testing frameworks.\nSupport production deployment: Work alongside MLOps Engineers to deploy, monitor, and maintain ML/AI solutions in production environments.\nApply engineering guidelines: Write clean, maintainable Python code, implement automated tests, participate in code reviews, and maintain technical documentation.\nWork with complex data: Retrieve, integrate, validate, and prepare datasets from multiple sources for model training, inference, and evaluation.\nRefine existing solutions: Examine technical problems, improve model performance, and support advancements in reliability and efficiency.\nCollaborate across teams: Work with Data Scientists, engineers, and product collaborators to understand requirements and deliver practical ML/AI solutions.\nDevelop technical expertise: Continuously acquire new ML/AI technologies, share knowledge, and contribute to engineering discussions and team practices.\nWhat We're Looking For\nEducation: BSc, MSc, or PhD in Computer Science, Machine Learning, Artificial Intelligence, Mathematics, or a related technical field, or equivalent experience in practice.\nExperience: 2+ years of professional experience in software engineering, machine learning engineering, or AI development, with practical experience developing ML models or AI-powered applications.\nSoftware engineering: Strong Python programming skills, including software build, testing, debugging, version control, and collaborative development practices.\nMachine learning: Hands-on experience developing, training, and evaluating supervised learning models using frameworks such as scikit-learn, PyTorch, TensorFlow, or similar.\nGenerative AI: Experience building applications using LLMs, including timely query formulation, structured outputs, RAG, and tool calling.\nML/AI evaluation: Understanding of model evaluation methodologies, performance metrics, and approaches to validating AI outputs.\nML specialization: Practical experience in at least one area such as recommender systems, time-series modeling, unsupervised learning, or reinforcement learning.\nData processing: Strong SQL skills and experience retrieving, transforming, and validating data from analytical databases and APIs.\nProduction ML: Familiarity with model deployment, inference services, monitoring, and ML lifecycle management.\nCloud & infrastructure: Working knowledge of cloud platforms (e.g., GCP, AWS, Azure), containers, CI/CD pipelines, and ML development environments.\nNice to have\nExperience in mobile gaming, digital entertainment, or large-scale consumer applications.\nExperience developing recommendation or personalization systems.\nFamiliarity with agentic workflows, AI agents, or advanced LLM applications.\nExperience with model serving, distributed computing, or performance optimization.\nExperience working with managed ML platforms such as Vertex AI.\nFamiliarity with Bayesian modeling, causal inference, or simulation techniques.\nImportant Information for Applicants\nCV Language: Please submit your CV in English.\nHybrid Working Policy: This role follows a hybrid working model, requiring attendance at our Barcelona office 3 days per week.\nThis job description may have been reviewed and enhanced using AI-assisted tools to improve clarity, consistency, and inclusivity. All final content, role requirements and hiring decisions remain subject to human review and approval by Aristocrat.\nCompensation Philosophy\nWe offer a comprehensive pay and benefits package designed to stay competitive in the market, support your wellbeing, and recognise your contribution to our success. Our approach is underpinned by a pay-for-performance belief in rewarding individual impact. Your specific compensation package will be determined by factors such as your skills, experience, qualifications, and location. \nDepending 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. \nSpecific details about compensation and benefits for this position will be discussed during the recruitment process.","description_format":"text","description_chars":5423,"description_truncated":false,"requirements":{"experience_years_min":2,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[{"language":"English","level":"All levels","optional":true}]},"benefits":["Annual bonuses","Hybrid work","Insurance coverage","Retirement plans"],"hiring_locations":[{"name":"Spain","iso":"ES","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Mobile Games","iGaming & Gambling"],"lifecycle":[{"event":"open","at":"2026-11-03T16:46:32Z"}],"visa":[],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":2,"expected_fill_days":36,"reasons":["conf:0","velocity","win:early","comp:junior,brand"],"computed_at":"2026-11-06T05:58:05Z"},"pay":null,"html_url":"https://alion.io/job/aristocrat-leisure-ml-engineer-2","json_url":"https://alion.io/job/aristocrat-leisure-ml-engineer-2.json","meta":{"generated_at":"2026-11-06T15:37:53Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":29167,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-07T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":8402},"rest":"https://alion.io/mcp/rest/get_company?id=8402"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Faristocrat-leisure-ml-engineer-2"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Faristocrat-leisure-ml-engineer-2"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Faristocrat-leisure-ml-engineer-2"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/aristocrat-leisure-ml-engineer-2\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Faristocrat-leisure-ml-engineer-2"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":3691674}},{"tool":"search_jobs","arguments":{"company":"aristocrat.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":3691674},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. 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