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 Analyst, 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.
We are looking for a high-caliber professional who thrives in ambiguity, sets high analytical standards, and translates complex insights into product decisions.
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.
Scalable Analytics & Frameworks
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.
Cross-Functional Leadership
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.
Skills & Requirements
Experience:



5+ years of proven experience as a Data Scientist or Product Analyst, preferably in high-growth tech environments or mobile ecosystems.
Education: Bachelor's or Master's degree in a highly quantitative field (Mathematics, Statistics, Computer Science, Data Science, or Economics).
Technical Mastery: Advanced proficiency in Python and SQL.
Hands?on experience working with massive, complex datasets and modern cloud data warehouses.
Statistical Rigor: Solid understanding of statistical concepts, hypothesis testing, causal inference, and regression methodologies.
Communication: Exceptional verbal and written communication skills in English.
Ability to present complex technical conclusions to C?level executives and non?technical stakeholders with clarity and impact.
Ownership & Autonomy: Proven track record of owning projects from ambiguity to measurable business outcome.
Comfortable building the playbook, not just following it.
Preferred Qualifications (A Plus)
Strong background in the ad?tech industry, mobile programmatic advertising (DSP/SSP), or user acquisition (UA) dynamics.
Familiarity with mobile app measurement frameworks (MMPs) and concepts like LTV optimization or incrementality.
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:
Integrate a highly motivated, young and dynamic team
Great compensation package
Top location at the heart of Barcelona with a rooftop terrace, Barbecue, and a fully stocked fridge
Great work?life balance: work from home (2 days per week),



versátil hours
Meal vouchers – Ticket Restaurant monthly allowance
Monthly gym allowance: Choose between DiR and Wellhub
LinkedIn Learning and training opportunities
Monthly TGIF events
Regular team?building events
Fun and friendly work environment with talented marketers and engineers from over 40 countries
Data Controller: SMADEX S.L. ('SMADEX'), ID B********, C/ Diputació 303 Primera Planta, ***** Barcelona.
Purpose: To manage your application within the framework of the recruitment processes carried out by Smadex.
Legitimation: Application of pre?contractual measures to meet your job application.
Recipients: In general, we do not disclose your data to third parties, except in the following cases:
(i) those required by law;
(ii) suppliers who provide us with certain services, who may have access to and/or process your personal data in their capacity as data processors.
Duration: Regarding your application, we will retain the data for one (1) year from receipt and for as long as you do not express your refusal to the processing.
At the end of this period, your data will be kept for the period of limitation of any possible legal liabilities of any kind.
Your rights: Access, rectification, objection, erasure, restriction of processing, portability and the right not to be subject to decisions based solely on automated processing.
You have the right to object at any time to the present processing of personal data, as well as to revoke the consent given.
These rights may be exercised by sending a communication to the address of SMADEX, or via ******.
Likewise, you may, at any time, file a complaint with the Spanish Data Protection Agency ().
International transfers: In no case will your personal data be transferred to countries located outside the European Union for which there are no adequate guarantees.
More information: You can find additional and detailed information on data protection in our Privacy Policy.
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📌 Senior Data Analyst (Madrid)
🏢 Smadex
📍 Madrid