Data Scientist, Marketing Mix Modelling

Do you want to build models that shape how ambitious brands invest in marketing? Are you motivated by combining Bayesian modelling, commercial understanding, and clear client advice?

At s360, you will own Marketing Mix Modelling engagements from the first data questions through to client-ready recommendations. Based in Barcelona and working with clients across the Nordics and the UK, you will help turn Meridian models into decisions clients can act on.

Build models clients can trust

As our Data Scientist you will take ownership of Marketing Mix Modelling delivery from end to end. You'll work closely with clients, Digital Growth colleagues, account teams and measurement specialists to make sure every model is technically sound, commercially relevant and easy to understand. You will bring the business context into the model, raise issues early when a result looks off, and help the team deliver work that clients can trust and use.

Join our international Measurement team

You will join s360's Measurement department as the go-to person for Marketing Mix Modelling, both with clients and inside s360. Most of your colleagues in Measurement build the tracking and data foundations that good models rely on, such as GA4, server-side setups and data quality. Your work starts after that: you decide how we build and calibrate our models, and you are the voice clients hear when we explain what the results mean. You will have real influence on how MMM grows with s360, including how incrementality testing fits alongside it. You will also work closely with Google's Meridian team on many of our existing engagements.

Your day-to-day base will be our office at Norrsken House Barcelona, which you'll share with colleagues from several s360 teams.

Bring Bayesian modelling and clear judgment

We're looking for a Data Scientist with technical depth, commercial curiosity and the ability to make complex things simple. You're comfortable owning the full modelling process, you ask the hard questions about data and assumptions, and you explain uncertainty in plain language.

• Bayesian framework expertise: Hands-on experience with Bayesian Marketing Mix Modelling in Meridian, PyMC-Marketing or Robyn, including adstock, saturation and prior selection.
• Client-ready delivery: The ability to deliver Meridian models that hold up in front of the client without rework, with well-founded priors, clean diagnostics and a clear readout.
• Model diagnostics and judgment: Experience with convergence, posterior predictive checks and fit, plus the judgment to tell whether a result is plausible.
• Media understanding: A solid grasp of how media is bought and measured across search, social, TV and offline channels.
• Client communication: Confidence in leading client conversations and explaining ROI, response curves and uncertainty in plain English.
• Cross-disciplinary collaboration: A collaborative mindset and motivation to work closely with colleagues across disciplines and markets.

At s360, you will be part of a Marketing and AI consultancy, working alongside more than 330 skilled colleagues across 10 offices in 8 countries. While our shared mission is to help brands and retailers grow, we are equally committed to fostering a strong culture, defined by collaboration, drive, and continuous development. We believe that our culture and ways of working are key to delivering long-term, meaningful results.

As a part of our team, you can look forward to:

We look forward to hearing from you!

Does this sound like the right fit for you? Do you have any questions? Then don't hesitate to apply or reach out to Frederik Hyldig Garoussian, Group CPO, at fh@s360digital.com.

We review applications on an ongoing basis and hire as soon as the right candidate is found, so please send your CV and application as soon as possible. All inquiries are treated confidentially.