> Markdown version of [/jobs/ext/2149880-senior-data-scientist](https://www.wearedevelopers.com/jobs/ext/2149880-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:** Álava, Spain
- **Contract:** Permanent contract
- **Skills:** A/B Testing, Software as a Service, EXEC (Scripting Language), Information Engineering, Data Warehousing, Python (Programming Language), SQL Databases
- **Published:** August 20, 2026
- **Apply:** https://www.buscojobs.com.es/senior-data-scientist-en-alava-ID-368418476

## About the Role

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
SaaS and product-focused experience strongly preferred
#J-*****-Ljbffr

## Description

My client is hiring aSenior Product Data Scientistto play a senior, highly strategic role within their product data organization. This is a rare opportunity to sit at the center ofproduct 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 productDesigning and analyzing advanced A/B tests, multivariate and Bayesian experimentsApplying causal inference techniques (DiD, synthetic controls, PSM, IVs) when RCTs aren't possibleBuilding KPI and measurement frameworks that connect product metrics to business outcomesTranslating complex statistical findings into clear, actionable narratives for senior leadershipPartnering with Data Engineering to scale experimentation tooling and self?serve analyticsWhat my client is looking for:6+ years of experience in product data science, experimentation, or applied analyticsDeep expertise in causal inference and advanced experimentation methodsStrong Python or R, expert SQL, and experience with modern data warehousesProven ability to influence senior stakeholders and drive data?driven changeSaaS and product-focused experience strongly preferred#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)
- [Analytics in the Age of Agentic AI: A tour of ClickHouse and Langfuse](https://www.wearedevelopers.com/videos/100240-analytics-in-the-age-of-agentic-ai-a-tour-of-clickhouse-and-langfuse)
- [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)
- [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers)
- [Data Analyst Salary Germany](https://www.wearedevelopers.com/magazine/277-data-analyst-salary-germany)
- [Data Analyst Salary Austria](https://www.wearedevelopers.com/magazine/275-data-analyst-salary-austria)
- [Top Big Data Technologies That You Need to Know](https://www.wearedevelopers.com/magazine/108-top-big-data-technologies-that-you-need-to-know)