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# Data Science Data Science Senior Data Scientist (Python) (Remote)

- **Company:** Smadex
- **Location:** Barcelona, Spain (Remote available)
- **Contract:** Permanent contract
- **Skills:** A/B Testing, Data Analysis, Big Data, Data Security, Data Visualization, Data Warehousing, Statistical Hypothesis Testing, Python (Programming Language), Machine Learning, Multivariate Testing, SQL Databases, Information Technology
- **Published:** September 26, 2026
- **Apply:** https://www.buscojobs.com.es/data-science-data-science-senior-data-scientist-python-remote-en-barcelona-ID-372864185

## About the Role

Experience: 5+ years of proven experience as a Data Scientist or Product Analyst, preferably in high-growth tech environments or mobile ecosystems.
Bachelor's or Master's degree in a highly quantitative field (Mathematics, Statistics, Computer Science, Data Science, or Economics).
Advanced proficiency in Python and SQL .
Hands-on experience working with massive, complex datasets and modern cloud data warehouses Solid understanding of statistical concepts, hypothesis testing, causal inference, and regression methodologies.
Communication: Exceptional verbal and written communication skills in English.
Ownership & Autonomy: Proven track record of owning projects from ambiguity to measurable business outcome.
You are comfortable building the playbook, not just following it.
Experience working with global, distributed cross-functional teams.

## Description

Smadex is a leading advertising technology company founded in Barcelona in **** and sold to American-based and stock-listed Entravision in **** (NYSE::EVC).We are a fully transparent platform built with top technology, countless programmatic management features and powerful machine learning algorithms to help advertisers grow their business at scale.We are currently considered one of the top mobile ad-tech companies in the world.As a Senior Data Scientist, you won't just analyze data, you will actively shape the future of our mobile advertising platform.You will sit at the intersection of product, engineering, and business, transforming raw behavioral data from millions of global users into scalable strategies.This is a full-time position based in Barcelona.Own the analytical loop that influences our Product and Machine Learning strategies.Use data to identify untapped opportunities and define what we build next.Design, execute, and evaluate sophisticated experimentation frameworks (A/B testing, multivariate testing) to measure the impact of new product features and ML algorithms.Establish and govern key performance frameworks to align cross-functional teams on what success looks like.Smadex is a leading advertising technology company founded in Barcelona in **** and sold to American-based and stock-listed Entravision in **** (NYSE::EVC).We are a fully transparent platform built with top technology, countless programmatic management features and powerful machine learning algorithms to help advertisers grow their business at scale.We are currently considered one of the top mobile ad-tech companies in the world.As a Senior Data Scientist, you won't just analyze data, you will actively shape the future of our mobile advertising platform.You will sit at the intersection of product, engineering, and business, transforming raw behavioral data from millions of global users into scalable strategies.This is a full-time position based in Barcelona.Own the analytical loop that influences our Product and Machine Learning strategies.Use data to identify untapped opportunities and define what we build next.Design, execute, and evaluate sophisticated experimentation frameworks (A/B testing, multivariate testing) to measure the impact of new product features and ML algorithms.Establish and govern key performance frameworks to align cross-functional teams on what success looks like.Build reproducible data models, frameworks, and processes that allow the company to scale decision-making without reinventing the wheel.Design high-impact data visualization assets that democratize data access and enable self-service insights for both technical and commercial stakeholders.Act as the strategic data partner for engineering, product, and business teams, translating deep technical findings into actionable, high-level business recommendations.Raise the bar for analytical rigor across the organization, mentoring junior team members and establishing best practices.Experience: 5+ years of proven experience as a Data Scientist or Product Analyst, preferably in high-growth tech environments or mobile ecosystems.Bachelor's or Master's degree in a highly quantitative field (Mathematics, Statistics, Computer Science, Data Science, or Economics).Advanced proficiency in Python and SQL .Hands-on experience working with massive, complex datasets and modern cloud data warehouses Solid understanding of statistical concepts, hypothesis testing, causal inference, and regression methodologies.Communication: Exceptional verbal and written communication skills in English.Ownership & Autonomy: Proven track record of owning projects from ambiguity to measurable business outcome.You are comfortable building the playbook, not just following it.Experience working with global, distributed cross-functional teams.Please note that we do NOT provide VISA sponsorship.Candidates without a legal permit to work in Spain won't be considered.What is in it for you: Great work-life balance: work from home (2 days per week), flexible hours LinkedIn Learning and training opportunities


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