Junior Research Scientist
hace 3 días
About the Company Playvalve is a vibrant fast-growing gaming studio with an eye on the future. Our mission is to build fun and relaxing games meant to last, and we do that by bringing together a team of experts who love what they do. Our talented designers, artists, engineers, marketeers and analysts have created several games delivering joy and entertainment to over 20M users across more than 12 languages and 90 countries. As a Principal Applied Scientist , you’ll bridge rigorous science with production impact. This is not a pure engineering role, we need someone who thinks like a scientist first : formulating hypotheses, designing experiments with statistical rigor, and building models grounded in solid mathematical foundations . We’re looking for someone who holds an advanced degree in a quantitative field , and has battle-tested their science in production environments . You should be equally comfortable working through the math behind a model as you are debugging production pipelines. Design and analyze controlled experiments (A/B tests, multi-armed bandits) with proper statistical rigor. Apply causal inference techniques to untangle correlation from causation in observational data. Stay current with research literature and bring cutting‑edge methods to production (when appropriate). Partner with Engineering to build real‑time decisioning APIs for game configuration and ad serving. Implement proper monitoring, evaluation frameworks, and fallback mechanisms. Ship models as stable services with clear performance guarantees. Build experimentation infrastructure and champion rigorous hypothesis testing across the org. Work with Product, Marketing, and Ad Monetization to prioritize high‑impact projects. Mentor other data scientists on scientific rigor. Establish standards for model evaluation, code quality, and documentation. PhD or MSc in Computer Science, Statistics, Applied Mathematics, Physics, Operations Research, or closely related quantitative field. ~7+ years in data science with 2+ years owning production ML systems. ~ Expert‑level Python and SQL; comfortable writing production‑quality code. ~ Strong grasp of experimentation design and statistical hypothesis testing (power analysis, multiple testing corrections, variance reduction techniques). ~ Demonstrated ability to read, critique, and apply research papers to real‑world problems. Experience with modern ML frameworks (TensorFlow, PyTorch, JAX, or similar) for deep learning and/or probabilistic programming (e.g., PyMC, Stan, TensorFlow Probability). Proficiency with cloud platforms (GCP, AWS, Azure) for data processing and model serving. Published research in top‑tier venues (NeurIPS, ICML, KDD, JMLR, etc.) or industry conferences. Subscription/SaaS: Churn prediction, upsell optimization, cohort analysis The Role: Own data science solutions from scratch with full autonomy. Based in Barcelona (office with terrace, BBQ, beer tap). Flexibility policy: the data team comes in regularly because they want to, not because they have to. Compensation & Perks: Competitive compensation based on experience, phantom stocks, relocation package, health insurance, ticket restaurant, unlimited vacations, regular company off‑sites. The Challenge: 15 games in market + ambitious pipeline.
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Senior Research Scientist
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Barcelona, España Preply A tiempo completoSenior Applied AI Scientist – Preply Join to apply for the Senior Applied AI Scientist role at Preply. We help people discover the magic of the perfect tutor, craft a personalized learning journey, and stay motivated to keep growing. Our approach is human‑led, tech‑enabled, and it’s creating real impact. Every Preply lesson sparks change, fuels...
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barcelona, España Sincrotrón ALBA A tiempo completoA leading research institution in Barcelona is seeking a Research Scientist for a 2-year contract to engage in advanced projects related to Atomic Layer Deposition and synchrotron radiation. The successful candidate will lead maintenance and operational activities, as well as participate in the analysis and publication of research results. Ideal applicants...
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Barcelona, España agap2 España A tiempo completoWe are looking for a Senior Optimization Scientist to join a cutting-edge technology project within the aviation and travel sector, working on complex, high-impact optimization problems.Genetic Algorithms, PSO, Simulated Annealing).Data Analysis & PreparationCollect, clean, and preprocess data from multiple sources.Identify patterns and insights to improve...
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Barcelona, España agap2 España A tiempo completoWe are looking for a Senior Optimization Scientist to join a cutting-edge technology project within the aviation and travel sector , working on complex, high-impact optimization problems.Genetic Algorithms, PSO, Simulated Annealing).Data Analysis & PreparationCollect, clean, and preprocess data from multiple sources.Identify patterns and insights to improve...
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Barcelona, España agap2 España A tiempo completoWe are looking for a Senior Optimization Scientist to join a cutting-edge technology project within the aviation and travel sector , working on complex, high-impact optimization problems.¿Quiere presentar una candidatura? Asegúrese de que su CV está actualizado y luego lea atentamente las siguientes especificaciones del puesto antes de solicitar.Genetic...
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Barcelona, España agap2 España A tiempo completoWe are looking for a Senior Optimization Scientist to join a cutting-edge technology project within the aviation and travel sector , working on complex, high-impact optimization problems.¿Quiere presentar una candidatura? Asegúrese de que su CV está actualizado y luego lea atentamente las siguientes especificaciones del puesto antes de solicitar.Genetic...
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hace 1 semana
Barcelona, España agap2 España A tiempo completoWe are looking for a Senior Optimization Scientist to join a cutting-edge technology project within the aviation and travel sector , working on complex, high-impact optimization problems.¿Quiere presentar una candidatura? Asegúrese de que su CV está actualizado y luego lea atentamente las siguientes especificaciones del puesto antes de solicitar.Genetic...
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Global Health Research Scientist
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Barcelona, España Barcelona Institute for Global Health (ISGlobal) A tiempo completoA leading public health research institute in Barcelona is seeking a Research Scientist to manage and execute the Democra-MITS project, aimed at improving mortality surveillance systems. Responsibilities include conducting independent research, designing protocols, leading scientific writing, and ensuring data quality. Ideal candidates will possess a PhD in...
