> Markdown version of [/jobs/ext/1909576-senior-decision-scientist](https://www.wearedevelopers.com/jobs/ext/1909576-senior-decision-scientist). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Senior Decision Scientist

- **Company:** Harnham
- **Location:** Brighton and Hove, UK
- **Experience:** Expert
- **Salary:** £80,000.0 - £90,000.0
- **Contract:** Permanent contract
- **Skills:** A/B Testing, Artificial Intelligence, Data Analysis, Information Engineering, Data Presentation, Machine Learning, Recommender Systems, SQL Databases, Data Analytics
- **Published:** August 4, 2026
- **Apply:** https://www.reed.co.uk/jobs/senior-decision-scientist/57191576

## About the Role

* Strong experience turning data into commercial recommendations and business outcomes.
 * Experience working within product, digital, e-commerce or technology environments.
 * Strong analytical capability, including SQL and relevant analytical tooling.
 * Experience designing and evaluating experiments, including A/B testing and statistical analysis.
 * Commercially minded with the ability to balance rigour and pace.
 * Comfortable working through ambiguity and solving open-ended business problems.
 * Interest in AI, machine learning and emerging technologies.
 * Ability to communicate complex findings clearly to both technical and non-technical audiences.
 * Experience with product analytics, opportunity sizing and performance measurement.

## Description

This is an exciting opportunity to join a growing Data & Analytics function at a business that is placing data and AI at the heart of its strategy. As a Senior Decision Scientist, you'll help shape how data is used to drive commercial decisions, improve product experiences, and influence long-term business outcomes. You'll join at a pivotal time as the organisation evolves its data capability and scales a high-impact team.
The Company
They are a fast-growing, product-led technology business operating internationally, with data and AI playing a central role in their future growth. The organisation has invested heavily in building strong data foundations, creating a mature analytics environment and fostering a culture of experimentation and innovation.
As they continue to scale, they are transforming their data function from a centralised model into embedded product teams, creating greater proximity between data professionals and business decision-making.
The Role
As a Senior Decision Scientist, you will work closely with Product Managers, Engineers, Designers and senior stakeholders to identify opportunities, influence strategy and deliver measurable business impact.
Key responsibilities include:

 * Understanding complex business and product challenges through data analysis.
 * Identifying, sizing and prioritising commercial opportunities.
 * Conducting product analytics to improve customer experiences and business performance.
 * Defining success metrics and building frameworks for measuring impact.
 * Designing, implementing and analysing A/B tests and experimentation programmes.
 * Supporting product teams with insight-driven decision making.
 * Delivering data storytelling and recommendations to senior stakeholders.
 * Collaborating across analytics, data engineering and data science disciplines.
 * Leveraging AI tools and emerging technologies to enhance analysis and product development.

Projects may include recommendation engines, customer personalisation, checkout optimisation, fraud reduction, financial process improvement, customer segmentation and AI-powered product features.


## Related Videos

- [Data Science in Retail](https://www.wearedevelopers.com/videos/586-data-science-in-retail)
- [Bringing the power of AI to your application.](https://www.wearedevelopers.com/videos/1010-bringing-the-power-of-ai-to-your-application)
- [Fault Tolerance and Consistency at Scale: Harnessing the Power of Distributed SQL Databases](https://www.wearedevelopers.com/videos/1146-fault-tolerance-and-consistency-at-scale-harnessing-the-power-of-distributed-sql-databases)
- [The Innovation Formula: Fast Prototyping, Data Analysis, and Real User Insights](https://www.wearedevelopers.com/videos/1421-the-innovation-formula-fast-prototyping-data-analysis-and-real-user-insights)
- [How We Built a Machine Learning-Based Recommendation System (And Survived to Tell the Tale)](https://www.wearedevelopers.com/videos/752-how-we-built-a-machine-learning-based-recommendation-system-and-survived-to-tell-the-tale)
- [Would You Buy Your Own HR? A Product Mindset for People Leaders](https://www.wearedevelopers.com/videos/1874-would-you-buy-your-own-hr-a-product-mindset-for-people-leaders)

## Related Articles

- [Data Analyst Salary in the UK](https://www.wearedevelopers.com/magazine/278-data-analyst-salary-in-the-uk)
- [Data Engineer Salary UK](https://www.wearedevelopers.com/magazine/253-data-engineer-salary-uk)
- [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers)
- [Dev Digest 119 - ❤️ === ❤️](https://www.wearedevelopers.com/magazine/454-dev-digest-119)
- [Navigating the AI Shift](https://www.wearedevelopers.com/magazine/629-navigating-the-ai-shift)
- [Software Engineer Salary London](https://www.wearedevelopers.com/magazine/252-software-engineer-salary-london)