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# Data Scientist

- **Company:** Harnham
- **Location:** London, UK
- **Salary:** £90,000.0 - £100,000.0
- **Contract:** Permanent contract
- **Skills:** A/B Testing, Machine Learning
- **Published:** July 14, 2026
- **Apply:** https://www.reed.co.uk/jobs/data-scientist/57119541

## About the Role

* Strong statistical foundation with the ability to apply rigorous analytical methods
 * Experience working with customer, product or subscription data
 * Knowledge of causal inference techniques such as propensity scoring, incrementality testing and counterfactual analysis
 * Experience designing experiments and interpreting A B testing results
 * Ability to translate complex technical outputs into clear business insights
 * Strong collaboration and stakeholder management skills
 * Proactive approach with a focus on delivering commercial impact
 * Academic background in a quantitative discipline such as mathematics, statistics, economics or similar

## Description

You will focus on applying causal inference techniques to quantify the true impact of customer behaviours, product features and commercial initiatives. Your work will directly influence how the business invests in growth, retention and engagement. Responsibilities include:

 * Applying causal inference methodologies to measure incrementality and customer lifetime value drivers
 * Designing and analysing experiments, quasi experiments and observational studies
 * Developing frameworks to distinguish correlation from causation in customer behaviour
 * Using techniques such as propensity score matching, double machine learning and counterfactual modelling
 * Measuring the incremental impact of actions such as product usage or subscription adoption
 * Working with large scale customer and product datasets to identify value drivers
 * Collaborating with stakeholders to translate complex analysis into clear business recommendations
 * Supporting the productionisation of analytical solutions


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