{"id":3172826,"url":"https://alion.io/job/sixt-senior-data-scientist-reinforcement-learning-offer-intelligence-mfd-3","title":"Senior Data Scientist Reinforcement Learning - Offer Intelligence (m/f/d)","company":{"id":1756998,"name":"Sixt","domain":"sixt.com","url":"https://alion.io/company/sixt-com","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Career sitemap","truth_index":null},"role":"Data Science","role_family":"Data Science","seniority":"senior","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Lisbon, Portugal"],"countries":["PT"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":38000,"max_usd":80000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":10},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AWS","optional":false},{"name":"Azure","optional":false},{"name":"CI/CD","optional":false},{"name":"Dagster","optional":false},{"name":"Docker","optional":false},{"name":"FastAPI","optional":false},{"name":"GCP","optional":false},{"name":"Kubeflow","optional":false},{"name":"Kubernetes","optional":false},{"name":"Python","optional":false},{"name":"Recommender Systems","optional":false},{"name":"Reinforcement Learning","optional":false}],"status":"live","first_seen_at":"2026-10-23T00:00:00Z","employer_posted_date":null,"last_verified_at":"2026-10-23T00:00:00Z","board_verified":false,"closed_at":null,"days_open":5,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":5},"description":"Sobre a vaga\nYou'll build and bring into production state-of-the-art probabilistic models that power millions of pricing and offer decisions at SIXT every day. You'll own the full lifecycle, from shaping the analytical question to deploying live models, supported by an innovation-friendly culture.\n\nO que vais fazer\n\nYou architect and prototype advanced regression models (linear, GLM, mixed-effects, Gaussian Process) with a principled Bayesian approach, guiding pricing strategy at scale\nYou design and productionise personalisation and recommendation systems - two-tower retrieval, embedding-based candidate generation, learning-to-rank, sequential/transformer models - with contextual bandits and off-policy evaluation to keep them learning from real interactions\nYou apply techniques like SVI, MCMC, and importance sampling to enable robust decision-making under uncertainty, even with sparse, high-volume, or streaming data\nYou build and maintain reproducible pipelines for feature engineering, label generation, and automated data validation using tools like Airflow or Dagster, ensuring high code quality and reliability\nYou deploy models via FastAPI, Docker, or Kubeflow, and establish real-time monitoring with Bayesian control charts and performance dashboards to catch drift and anomalies early\nYou design sophisticated A/B and multivariate tests, apply quasi-experimental and causal impact methods, and quantify the value of information to balance exploration and exploitation\nYou collaborate with product, revenue, and customer experience leaders to translate ambiguous ideas into testable hypotheses, while mentoring peers and elevating Bayesian practice through internal publications and workshops\n\nO que é pedido\n\nExpertise You bring deep statistical chops, with 5+ years of applying regression, hierarchical models, or state-space methods in production\nComputing proficiency You have a well-stocked Bayesian toolbelt - fluent in PyMC, Stan, NumPyro, TFP, or similar - and are comfortable writing custom likelihoods and priors\nModeling You have proven experience scaling inference using SVI, black-box VI, or advanced MCMC techniques on large datasets\nEngineering practices You write solid, production-grade Python code and are familiar with type hints, testing frameworks, and CI/CD workflows\nInfrastructure You are hands-on with cloud platforms like AWS, GCP, or Azure, and have experience with containerization (Docker/K8s) and workflow orchestration\nStakeholder management You communicate uncertainty, lift, and risk in plain English for executives, while engaging deeply with scientists and engineers\n\nValorizado\n\nPersonalisation (nice to have) You have experience with recommender and personalisation stacks - two-tower / embedding retrieval, learning-to-rank, sequential models, contextual bandits - plus counterfactual or off-policy evaluation to prove incremental value rather than optimise click-through\n\nO que é oferecido\n\nA Global Tech Hub in Lisbon\nLearning & Knowledge Exchange\nFlexible Work Setup\nTwo office days a week, flexible hours, and modern spaces built for both deep focus and team collaboration\nTime Off & Wellbeing\nEnjoy 28 vacation days per year, an additional day off on your birthday, one volunteer day annually, and private health insurance that also covers your spouse and children free of charge\nPractical Everyday Benefits\nGet a yearly Coverflex allowance and a daily meal allowance to make everyday life a little easier\nSIXT Perks\nGet exclusive rates on all SIXT services, with special discounts extended to your family and friends\n\nResumo organizado por IA a partir do anúncio original. Confirma os detalhes no site da empresa.","description_format":"text","description_chars":3679,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Flexible schedule","Health insurance"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Travel & Tourism","Car Rental","Buy Now, Pay Later"],"lifecycle":[{"event":"open","at":"2026-10-23T18:46:35Z"}],"visa":[],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":4,"expected_fill_days":28,"reasons":["seen:4","velocity","win:early"],"computed_at":"2026-10-27T05:46:45Z"},"pay":null,"html_url":"https://alion.io/job/sixt-senior-data-scientist-reinforcement-learning-offer-intelligence-mfd-3","json_url":"https://alion.io/job/sixt-senior-data-scientist-reinforcement-learning-offer-intelligence-mfd-3.json","meta":{"generated_at":"2026-10-28T01:22:28Z","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":1724,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-29T00:00:00Z"}},"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":1756998},"rest":"https://alion.io/mcp/rest/get_company?id=1756998"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fsixt-senior-data-scientist-reinforcement-learning-offer-intelligence-mfd-3"},{"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%2Fsixt-senior-data-scientist-reinforcement-learning-offer-intelligence-mfd-3"},{"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%2Fsixt-senior-data-scientist-reinforcement-learning-offer-intelligence-mfd-3"},{"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/sixt-senior-data-scientist-reinforcement-learning-offer-intelligence-mfd-3\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fsixt-senior-data-scientist-reinforcement-learning-offer-intelligence-mfd-3"}]}