Senior Data Scientist

Salary: £50,000 - 90,000 per year

Requirements:

• Significant experience as a Data Analyst, Senior Data Analyst, Data Scientist, Insight Analyst or equivalent analytical professional.
• Strong analytical and problem-solving skills, including the ability to create clarity from ambiguous business questions.
• Advanced Python skills for data analysis and modelling, together with strong SQL capability.
• Practical experience applying statistical and data-science techniques to business problems, including several of forecasting, regression, classification, segmentation and propensity modelling.
• Sound understanding of statistical concepts, model evaluation, uncertainty, bias and the limitations of analytical approaches.
• Experience working with large or complex datasets and performing data discovery, validation and exploratory analysis.
• Excellent requirements-gathering, stakeholder-management and project-planning skills.
• Excellent written communication, with experience producing analytical papers or recommendations for senior audiences.
• Ability to translate complex analysis into concise conclusions, commercial implications and practical actions.
• Ability to iterate quickly, prioritise effectively and provide useful initial answers without waiting for perfectly defined requirements.
• Desirable: Experience with time-series techniques such as ARIMA, exponential smoothing or related forecasting methods.
• Desirable: Experience developing customer churn, lifetime value, propensity, anomaly-detection or segmentation models.
• Desirable: Experience analysing financial, operational, customer or risk data.
• Desirable: Experience using machine-learning techniques beyond traditional statistical analysis.
• Desirable: Experience with Snowflake or another cloud data platform, Streamlit and Power BI.
• Desirable: Experience in financial services or another regulated, data-rich environment.

Responsibilities:

• Turn complex and often loosely defined business questions into clear, actionable insight.
• Lead high-value analytical work using Python, SQL, statistical methods and appropriate machine-learning techniques.
• Explain what is happening, understand why it is happening and assess what may happen next.
• Combine analytical rigour with commercial judgement, stakeholder engagement and strong written communication to help ensure analysis informs practical business decisions.
• Work with senior stakeholders to clarify uncertain questions and explain the significance of findings in plain language.
• Create clarity from ambiguity, work at pace and turn analysis into decisions.

Technologies:

• Cloud
• Data-Science
• Power BI
• Python
• SQL
• Snowflake

More:

We are AJ Bell, one of the UKs fastest-growing investment platform businesses. We provide accessible investment solutions, including ISAs, pensions and dealing accounts, for people investing independently or with a financial adviser. More than 762,000 customers trust us to manage over £121.5 billion in assets. We are proud to have been recognised as one of the UKs Best 100 Companies to Work For for six consecutive years and as a Great Place to Work in 2025 and 2026. We offer 26 days holiday, increasing with service, a buy/sell scheme and bank holidays; a 7% pension with matched contributions; a discretionary bonus scheme; share schemes; a Health Cash Plan and discounted private healthcare; a free onsite gym; enhanced family leave subject to qualifying criteria; travel and bike loan schemes; and an Employee Assistance Programme. Our culture includes regular social events, tailored learning and development, casual dress and a friendly, supportive team environment. We work on a hybrid basis, with at least 50% of working time per month in the office; new team members spend an initial period full-time in the office. We are committed to an inclusive workplace and welcome applicants from all backgrounds, making hiring decisions based on skills, experience and potential. This is a full-time, mid-senior-level role in financial services, within the Customer Service function.

last updated 39 week of 2026