> Markdown version of [/jobs/ext/1936158-senior-data-scientist](https://www.wearedevelopers.com/jobs/ext/1936158-senior-data-scientist). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Data Scientist - **Company:** Harnham - **Location:** Cantabria, Spain - **Contract:** Permanent contract - **Skills:** A/B Testing, EXEC (Scripting Language), Information Engineering, Data Warehousing, Python (Programming Language), SQL Databases - **Published:** August 5, 2026 - **Apply:** https://www.buscojobs.com.es/senior-data-scientist-en-ribamontan-al-mar-ID-366055866 ## About the Role Key focus areas include: Owning and driving the experimentation roadmap across the product Designing and analyzing advanced A/B tests, multivariate and Bayesian experiments Applying causal inference techniques (Di D, synthetic controls, PSM, IVs) when RCTs aren't possible Building KPI and measurement frameworks that connect product metrics to business outcomes Translating complex statistical findings into clear, actionable narratives for senior leadership Partnering with Data Engineering to scale experimentation tooling and self?serve analytics What my client is looking for: 6+ years of experience in product data science, experimentation, or applied analytics Deep expertise in causal inference and advanced experimentation methods Strong Python or R, expert SQL, and experience with modern data warehouses Proven ability to influence senior stakeholders and drive data?driven change Saa S and product-focused experience strongly preferred If this sounds like something you'd like to explore-or ## Description My client is hiring a Senior Product Data Scientist to play a senior, highly strategic role within their product data organization.This is a rare opportunity to sit at the center of product strategy, experimentation, and causal inference, with real influence on how data drives decision?making at the executive level.In this role, you'll lead the evolution of experimentation and measurement across the product, uncover non?obvious insights from complex datasets, and help leadership clearly understand true impact-not just correlation.You'll act as a trusted thought partner to Product, Engineering, Design, Finance, Marketing, and exec leadership while mentoring and leveling up other data scientists.Key focus areas include: Owning and driving the experimentation roadmap across the product Designing and analyzing advanced A/B tests, multivariate and Bayesian experiments Applying causal inference techniques (Di D, synthetic controls, PSM, IVs) when RCTs aren't possible Building KPI and measurement frameworks that connect product metrics to business outcomes Translating complex statistical findings into clear, actionable narratives for senior leadership Partnering with Data Engineering to scale experimentation tooling and self?serve analytics What my client is looking for: 6+ years of experience in product data science, experimentation, or applied analytics Deep expertise in causal inference and advanced experimentation methods Strong Python or R, expert SQL, and experience with modern data warehouses Proven ability to influence senior stakeholders and drive data?driven change Saa S and product-focused experience strongly preferred If this sounds like something you'd like to explore-or you know someone exceptional in this space-feel free to DM me.Happy to share more context on the role and team.#J-*****-Ljbffr ## Related Videos - [Alibaba Big Data and Machine Learning Technology](https://www.wearedevelopers.com/videos/37-alibaba-big-data-and-machine-learning-technology) - [Data Science in Retail](https://www.wearedevelopers.com/videos/586-data-science-in-retail) - [Fault Tolerance and Consistency at Scale: Harnessing the Power of Distributed SQL Databases](https://www.wearedevelopers.com/videos/1146-fault-tolerance-and-consistency-at-scale-harnessing-the-power-of-distributed-sql-databases) - [Bringing the power of AI to your application.](https://www.wearedevelopers.com/videos/1010-bringing-the-power-of-ai-to-your-application) - [The Innovation Formula: Fast Prototyping, Data Analysis, and Real User Insights](https://www.wearedevelopers.com/videos/1421-the-innovation-formula-fast-prototyping-data-analysis-and-real-user-insights) - [Would You Buy Your Own HR? A Product Mindset for People Leaders](https://www.wearedevelopers.com/videos/1874-would-you-buy-your-own-hr-a-product-mindset-for-people-leaders) ## Related Articles - [Data Engineer Salary UK](https://www.wearedevelopers.com/magazine/253-data-engineer-salary-uk) - [Data Analyst Salary in the UK](https://www.wearedevelopers.com/magazine/278-data-analyst-salary-in-the-uk) - [Résumé-Driven Development: How IT trends affect the job market for software developers](https://www.wearedevelopers.com/magazine/59-resume-driven-development-how-it-trends-affect-the-job-market-for-software-developers) - [Navigating the AI Shift](https://www.wearedevelopers.com/magazine/629-navigating-the-ai-shift) - [Coffee with Developers - Maria Apazoglou - Making AI understandable for all in production](https://www.wearedevelopers.com/magazine/475-coffee-with-developers-maria-apazoglou-making-ai-understandable-for-all-in-production) - [Top Big Data Technologies That You Need to Know](https://www.wearedevelopers.com/magazine/108-top-big-data-technologies-that-you-need-to-know)