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Senior Scientist Spain Jobs

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Senior AI Research Scientist
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Senior AI Research Scientist sought by Adyen to lead applied AI innovation in fintech. This Madrid-based role involves designing and deploying production-grade agentic systems for complex financial tasks, owning evaluation frameworks, and shaping AI strategy. Requires 6+ years shipping LLM-powere...
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Spain , Madrid
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Adyen
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Senior Data Scientist
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Senior Data Scientist role in Barcelona, Spain, driving customer engagement through machine learning and experimentation. You'll own core models for recommendations and personalization, impacting user retention and revenue. Requires deep ML, statistical modeling, and Python expertise, plus SQL an...
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Spain , Barcelona
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Delivery Hero
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Senior Data Scientist
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Madbox seeks a Senior Data Scientist to drive end-to-end projects in Barcelona, Spain. You will analyze player behavior, design A/B tests, and develop predictive models using Python, SQL, and GCP. Ideal candidates have 3+ years in Data Science, strong statistics skills, and experience with large-...
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Spain , Barcelona
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Madbox
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Senior Data Scientist
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Join our Trust & Safety mission in Barcelona as a Senior Data Scientist. You will build and deploy production ML models (XGBoost, Neural Networks) to combat fraud and assess risk. Leverage your 5+ years of Python and ML expertise on a cross-functional team. Enjoy a competitive salary, annual bonu...
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Spain , Barcelona
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Adevinta
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Senior Data Scientist
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Join our Trust & Safety mission in Barcelona as a Senior Data Scientist. You will build and deploy production ML models (XGBoost, Neural Networks) to detect fraud and assess user risk. Leverage your 5+ years of Python and ML expertise to have a real impact on platform safety. Enjoy competitive sa...
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Spain , Barcelona
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Adevinta
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Senior Data Scientist
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Join our mission to enhance platform safety for millions of users in Barcelona. As a Senior Data Scientist, you'll build end-to-end ML models, specializing in Computer Vision, NLP, and Generative AI. We offer an attractive salary, annual bonus, and a flexible "Work From Anywhere" policy. Apply yo...
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Spain , Barcelona
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Adevinta
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Senior Applied Scientist
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Join Microsoft's Location Service team in Barcelona as a Senior Applied Scientist. You will advance global location intelligence through large-scale data modeling, geospatial analysis, and rigorous experimentation. Your work will power context-aware experiences in products like Bing, Azure Maps, ...
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Spain , Barcelona
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Microsoft Corporation
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Senior Data and Applied Scientist
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Join the Bing Places team in Barcelona to shape the future of local search. As a Senior Data Scientist, you'll design relevance metrics, build LLM labeling pipelines, and apply RAG techniques. Leverage your advanced degree to improve search quality for millions using cutting-edge AI and data scie...
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Spain , Barcelona
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Microsoft Corporation
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Senior Data Scientist
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Join our Data and Insight team as a Senior Data Scientist in Spain. This fully remote role focuses on building high-impact ML models, designing robust simulations, and driving business outcomes through rigorous A/B testing. We seek a candidate with 3-4 years of Python experience, strong statistic...
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Spain
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Bark
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Senior Data Scientist
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Spain
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Bark
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Senior Data Scientist
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Join our team in Barcelona as a Senior Data Scientist to enhance platform safety for millions. You will design and build end-to-end ML models, specializing in Computer Vision, NLP, and Generative AI. Enjoy a competitive salary, annual bonus, and flexible "Work From Anywhere" benefits in a collabo...
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Spain , Barcelona
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Adevinta
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Senior Data Scientist
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Spain , Barcelona
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Adevinta
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Senior Data Scientist
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Join our Trust & Safety mission in Barcelona as a Senior Data Scientist. You will build and deploy production ML models for fraud detection and risk assessment. We require 5+ years of experience with Python, classical ML, and end-to-end model lifecycle management. Enjoy a competitive salary, annu...
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Spain , Barcelona
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Adevinta
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Senior Data Scientist
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Join Adevinta in Barcelona as a Senior Data Scientist. Develop end-to-end ML models, specializing in Computer Vision, NLP, and Generative AI, to enhance a platform for millions. Enjoy a competitive salary, annual bonus, and flexible "Work From Anywhere" days in a collaborative, growth-oriented en...
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Spain , Barcelona
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Adevinta
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Senior Data Scientist
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Join our Trust & Safety mission in Barcelona as a Senior Data Scientist. You will build and deploy production ML models (XGBoost, Neural Networks) to detect fraud and assess user risk. Leverage your 5+ years of Python and ML expertise on a cross-functional team. Enjoy a competitive salary, annual...
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Spain , Barcelona
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Adevinta
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Senior Data Scientist - Fraud Specialist
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Join Prima's Global Pricing & Underwriting team in Madrid as a Senior Data Scientist - Fraud Specialist. Use advanced analytics and ML to build fraud detection systems and shape insurance strategy. Enjoy full flexibility, growth opportunities, and a collaborative environment. Requires 2+ years in...
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Spain , Madrid
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Prima
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About the Senior Scientist role

Senior Scientist jobs represent a pinnacle of technical expertise and research leadership across industries ranging from technology and healthcare to environmental science and pharmaceuticals. Professionals in these roles are distinguished by their ability to independently drive complex, high-impact projects that push the boundaries of their field. Unlike junior or mid-level scientists, a Senior Scientist is expected to not only execute advanced research but also to define the strategic direction of projects, mentor junior team members, and translate scientific findings into tangible business or societal value. The core of the role involves designing and overseeing rigorous experiments, developing novel algorithms or methodologies, and analyzing large, often unstructured datasets to extract actionable insights.

In the tech sector, this frequently means architecting and deploying sophisticated machine learning models, from deep learning and natural language processing to reinforcement learning, to solve problems at scale. In life sciences or healthcare, it may involve designing clinical study protocols, validating diagnostic tools, or leading drug discovery efforts. A common thread across all Senior Scientist jobs is the responsibility for the entire lifecycle of a research initiative: from hypothesis generation and experimental design, through data collection and analysis, to the communication of results through publications, patents, or executive presentations. These professionals are also the bridge between pure research and practical application, ensuring that innovations are robust, scalable, and aligned with organizational goals.

The typical requirements for these positions are stringent, usually demanding a PhD in a relevant scientific discipline such as computer science, statistics, biology, chemistry, or engineering, coupled with several years of post-doctoral or industry experience. Essential skills include deep proficiency in programming languages like Python or R, mastery of statistical analysis and experimental design (including A/B testing), and a strong publication record. Beyond technical acumen, Senior Scientists must possess exceptional problem-solving abilities, strategic thinking, and the capacity to lead cross-functional teams. They must be excellent communicators, capable of explaining complex scientific concepts to non-experts and influencing key decisions.

Ultimately, Senior Scientist jobs are for those who want to be at the forefront of discovery, shaping the future of their field while delivering measurable results.