Head of Data Science

HEAD OF DATA SCIENCE

SALARY BETWEEN £120,000 - £140,000 + EQUITY

HYBRID WORKING (3 DAYS A WEEK IN-OFFICE)

LONDON

Harnham are working with a high-growth fintech business that is transforming the customer lending journey through a highly digital, data-led platform. This is a rare opportunity for an experienced data science leader to take ownership of modelling strategy while remaining hands-on in delivery.

THE COMPANY

This high-growth fintech is reshaping the customer lending experience through a digital-first platform, leveraging advanced data science, AI and automation to deliver faster, smarter decisions for customers. With a strong focus on technology and innovation, the business has embedded machine learning and AI across multiple areas of the organisation and continues to invest heavily in its data capabilities as it scales. This is an opportunity to join a collaborative and ambitious environment where data science sits at the heart of business strategy and product development.

THE ROLE

This is a highly impactful individual contributor role with strategic responsibility for the direction of data science. You will own the development of predictive models, AI solutions and decisioning capabilities that directly influence customer outcomes and commercial performance.

Specifically, you can expect to be involved in:

• Developing and enhancing predictive machine learning models for decisioning, risk and recommendation use cases.
• Building and deploying AI and agent-based solutions into production environments.
• Designing data science strategies that balance customer experience, operational efficiency and commercial objectives.
• Working closely with product, engineering and business stakeholders to deliver measurable impact.
• Driving experimentation, monitoring model performance and identifying new opportunities for advanced analytics.

SKILLS AND EXPERIENCE

The successful Head of Data Science must have the following skills and experience:

• Proven experience building and deploying machine learning models in commercial environments.
• Strong Python and SQL skills with experience working across modern cloud-based data platforms.
• Practical experience with AI agents, LLM applications or agentic workflows.
• Background within consumer-focused businesses where recommendation, decisioning or personalisation models have been applied.
• Experience operating in fast-paced, evolving environments with a hands-on approach to delivery.
• Strong academic background in a STEM subject such as Computer Science, Engineering, Mathematics or a related discipline.

BENEFITS

The successful Head of Data Science will receive a salary between £120,000 - £140,000 plus equity.