Senior Data Scientist – Marketing

Company: Harnham
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Job Description:

This is a high-impact Senior Data Scientist opportunity within a growing consumer-focused business investing heavily in marketing and data. You’ll play a key role in helping the organisation understand what drives customer acquisition and where marketing spend generates the greatest return.


The Company


They are a fast-growing digital business with a strong data-driven culture and ambitious growth plans. Data and experimentation sit at the centre of commercial decision-making, giving this role visibility and influence across the organisation.


The Role


You will lead marketing measurement and experimentation, partnering closely with marketing stakeholders to improve performance and budget allocation.


Key responsibilities include:



  • Developing and enhancing Marketing Mix Models (MMM)

  • Designing and analysing incrementality and geo-based tests

  • Improving attribution and marketing measurement frameworks

  • Building and maintaining Customer Lifetime Value (LTV) models

  • Delivering actionable insights to non-technical stakeholders

  • Using AI and automation to improve analytical efficiency


Your Skills & Experience



  • Strong experience in MMM, incrementality testing or causal inference

  • Excellent statistical and experimental design knowledge

  • Advanced SQL and Python skills

  • Experience with modern analytics platforms such as Snowflake and dbt

  • Understanding of attribution, paid media measurement and privacy challenges

  • Ability to translate complex analysis into commercial recommendations


What They Offer



  • Performance-related bonus

  • Fully remote working across the UK

  • Private healthcare and pension

  • Enhanced annual leave

  • Strong opportunity to influence business strategy and growth

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Posted: October 22nd, 2026