Senior Growth Data Scientist

Smadex is a performance advertising engine for mobile apps, enabling the world's leading marketers to grow across Mobile and Connected TV (CTV). Powered by AI models trained on real campaign outcomes, Smadex delivers profitable growth at scale. Headquartered in Barcelona, with teams across the Americas, EMEA, and APAC, Smadex is a business unit of Entravision (NYSE: EVC).

As a Senior Growth Data Scientist, you won’t just analyze campaign metrics—you will actively drive revenue growth and advertiser success across our global platform. Sitting at the intersection of Commercial, Operations, Product, and Machine Learning teams, you will transform massive behavioral datasets into scalable growth strategies, rigorous incrementality frameworks, and high-impact client insights. We are looking for an autonomous, commercially minded data leader who thrives in ambiguity and turns complex programmatic data into measurable business outcomes.

This is a full-time position based in Barcelona.

Campaign Performance & Growth Strategy

• Own the analytical strategy for campaign optimization and advertiser growth, proactively identifying high-leverage opportunities to maximize client ROI and platform spend.
• Design, execute, and evaluate advanced measurement and experimentation methodologies (A/B testing, incrementality/lift studies, causal inference) to prove campaign value and optimize bidding/targeting strategies.
• Partner directly with top-tier advertisers and internal commercial leads on complex, high-stakes performance challenges, acting as a trusted strategic advisor.

Scalable Frameworks & Product

• Translate market trends, advertiser needs, and campaign performance learnings into concrete recommendations that directly shape Smadex’s Product and Machine Learning roadmaps.
• Build reproducible analytical models, automated diagnostic tools, and scalable performance frameworks that empower Growth teams to make faster, data-backed decisions.
• Define and govern core growth KPIs and benchmarking frameworks across verticals (Gaming, Non-Gaming, CTV).

Cross-Functional Leadership

• Act as the strategic bridge between commercial teams (Sales, Account Management) and technical teams (ML Engineers, Product Managers), communicating complex findings with clarity and executive presence.
• Raise the bar for analytical rigor across the Growth organization by mentoring junior data scientists/analysts and establishing best practices.

Skills & Requirements

• Experience: 5+ years of proven experience as a Growth Data Scientist, Marketing Data Scientist, or Senior Data Analyst in high-growth tech, mobile ecosystems, or ad-tech.
• 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. Extensive hands-on experience querying and modeling massive datasets in modern cloud data warehouses.
• Statistical & Experimental Rigor: Deep expertise in statistical modeling, hypothesis testing, causal inference, and incrementality measurement.
• Commercial Acumen & Communication: Exceptional verbal and written communication skills in English. Proven ability to translate complex statistical conclusions into compelling narratives for C-level executives, clients, and non-technical stakeholders.
• Ownership & Autonomy: Demonstrated track record of taking ambiguous business problems from zero to measurable revenue or performance impact. You build the playbook rather than just following it.

Preferred Qualifications (A Plus)

• Strong background in the ad-tech industry, mobile programmatic advertising (DSP/SSP, RTB), or mobile User Acquisition (UA).
• Hands-on experience with mobile attribution partners (MMPs), lifetime value optimization techniques, and incremental lift testing methodology.
• Experience collaborating with global, distributed commercial and engineering 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
• Private Health Insurance
• 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!