The English-language job board for Spain

Senior Growth Data Scientist

Hybrid in Barcelona·Full-time·Added 3 days ago (last checked 12 Nov)

Smadex

15 open roles

Apply

Our summary

Work mode: Hybrid, Barcelona
Contract: Full-time
English: Required
Experience: 5+ years
Education: University degree
Benefits: Private health insurance, meal vouchers, gym access

Visa options

The ad rules out sponsorship
Per the ad: “Please note that we do NOT provide VISA sponsorship. Candidates without a legal permit to work in Spain won't be considered.”

Find jobs with visa support

Skills

Requirements

What we're looking for

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.

Nice to have

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.

Pay & benefits

What you'll get

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!

Visa & relocation

Please note that we do NOT provide VISA sponsorship. Candidates without a legal permit to work in Spain won't be considered.

The role

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.

What you'll do

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.

How you'll work

This is a full-time position based in Barcelona.

About Smadex

Smadex is a Madrid-based advertising technology company specializing in programmatic mobile advertising and performance marketing. The company provides a demand-side platform (DSP) that enables advertisers to run targeted campaigns across mobile apps and web, with a strong focus on data-driven optimization and creative innovation. Smadex operates globally, with a team of over 100 professionals serving clients across Europe, the US, and other international markets.

Smadex's headquarters and main engineering hub are in Madrid, Spain, making it a key player in the local AdTech ecosystem. The company is known for its collaborative, data-centric culture and invests heavily in machine learning, data science, and creative technology. For international professionals, Smadex offers the opportunity to work in a fast-growing, global-facing company in the heart of Spain, with roles spanning engineering, data science, product, and creative strategy.

Industry: AdTech
Founded: 2011
Employees: 100–500
Headquarters: Madrid, Spain
In Spain: Madrid

Good to know if you are moving

Smadex is headquartered in Madrid, Spain, offering international professionals the chance to work in a vibrant European capital with a growing tech scene.
The company operates globally, with clients and partners across Europe, the US, and Asia, providing exposure to international markets.
Smadex focuses on data-driven advertising, making it an attractive employer for data scientists, machine learning engineers, and product managers.
The company has a strong emphasis on creative technology, with roles like Creative Technologist and Game Developer for playable ads, offering unique opportunities in the AdTech space.
Smadex is a mid-sized company, allowing employees to have a significant impact on products and processes.

All open roles at Smadex