Marketing Data Scientist

Oliver Bernard; Greater London; Hybrid; GBP 129,000 - 185,000; Part time

Job summary

Oliver Bernard is seeking a Senior Data Scientist (Marketing Science) for a 6-month contract in London. You will build and scale models decoding customer journeys and informing strategy, operating autonomously with large-scale data.

Responsibilities include leading MMM/MTA projects, conducting geo-tests, and translating results for senior stakeholders while driving cross-functional collaboration in a fast-paced environment.

Qualifications

• Track record building MMM/MTA or similar econometric models in D2C/e-commerce.

Responsibilities

• Design, build and maintain MMM and MTA models driving marketing decisions.

Skills

Bayesian modelling

Python

SQL

Communication

Independent work

Econometrics

Stakesholder engagement

Project management

Incrementality

Tools

PyMC

Python

SQL

Vertex AI

Google Cloud

Job description

Senior Data Scientist (Marketing Science) - 6 month Contract - Outside IR35 - 2 days a week in London

The opportunity

A fast-growing global consumer brand is looking for a Senior Data Scientist to join its Marketing Science function on a contract basis. You will be the statistical engine behind how the business measures and optimises its worldwide marketing investment, building and scaling the models that decode the customer journey and, just as importantly, explaining what they mean for strategy.

This is a role for someone who can work autonomously, take messy, large-scale data and turn it into reliable evidence that senior marketing stakeholders act on.

What you’ll be doing

• Designing, building and maintaining the Media Mix Models (MMM) and Multi-Touch Attribution (MTA) models that drive marketing decisions
• Leading experimentation, including geo-testing and causal inference frameworks, to validate model performance and measure true incremental impact
• Translating complex statistical outputs into clear, actionable narratives for both technical peers and executive stakeholders
• Working through data complexity and technical debt to deliver high-quality solutions across a multi-channel marketing environment
• Managing projects end to end, from discovery through to production and stakeholder adoption
• Working closely with Digital Marketing and Product teams so that models are embedded in day-to-day decision-making
• Challenging existing measurement conventions and bringing new approaches to the team

About you

• A proven track record of building MMM, MTA or similar econometric models in a D2C or e-commerce environment
• Hands-on experience with Bayesian modelling using PyMC (essential)
• Strong Python (or R) and SQL
• Experience using cloud platforms such as Google Cloud / Vertex AI to scale statistical applications
• Demonstrable experience designing geo-tests and incrementality studies
• Able to manage large projects independently without a predefined map
• Excellent communication skills, with the ability to influence decisions and guide stakeholders through technical topics
• Commercial awareness to pick the right problem to solve at the right time
• A mentoring mindset, happy to share knowledge and raise the technical bar of the team
• Comfortable in a fast-paced, rapidly scaling environment

The team

You will join a growing team of Data Scientists and Machine Learning Engineers who build models that personalise experiences, optimise decisions and predict future trends. The environment is collaborative, inclusive and entrepreneurial, and values fresh thinking and the courage to challenge the status quo.

Senior Data Scientist (Marketing Science) - 6 month Contract - Outside IR35 - 2 days a week in London