Smadex SLU

Senior Data Scientist

Barcelona, Barcelona, Spain - Full Time

Smadex is a leading advertising technology company founded in Barcelona in 2011 and sold to American-based and stock-listed Entravision in 2018 (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. 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.

Product & ML Strategy Influence

  • 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. You are comfortable building the playbook, not just following it.
  • Work Authorization: Must have valid work authorization to work in the US. We do NOT provide VISA sponsorship for this role.

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), flexible 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
  • And more!
Apply: Senior Data Scientist
* Required fields
First name*
Last name*
Email address*
Location
Phone number*
Resume*

Attach resume or Paste resume

Attach resume as .pdf, .doc, .docx, .odt, .txt, or .rtf (limit 5MB) or paste resume

Paste your resume here or attach resume file

LinkedInLinkedIn profile URL:
Desired salary
Earliest start date?
Which EU country are you based?*
What type of legal work permit do you have?*
How many years of experience do you have as a Data Analyst/ Data Scientist?*
What is your English level?*
Do you have a Degree in a Quantitative Field (i.e Engineering, Statistics, Mathematics, Data Science)?*
Do you have 3 or more years of experience working specifically in the programmatic advertising sector (e.g., DSP, SSP, or MMP)?*
Data Controller: SMADEX S.L. (''SMADEX''), ID B65322034, C/ Diputació 303 Primera Planta, 08009 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 [email protected]. Likewise, you may, at any time, file a complaint with the Spanish Data Protection Agency (www.aepd.es). 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.
Please note, that in the event that you provide us with data of third parties, we remind you that you are solely responsible for having obtained their prior consent to communicate personal data to us in accordance with the purposes informed in each case, as well as for having informed them of the content of this informative clause.*
Human Check*