Lead Data Scientist - Customer Analytics Consulting

Harnham; Greater London; On-site; GBP 86,000 - 105,000; Full time

Benefits offered by this job

Competitive salary

Onsite in Central London (4 days/week)

Benefits package

Job summary

Harnham is seeking a Lead Data Scientist to shape and lead a growing AI business from central London. You’ll guide a small team while staying hands-on on complex ML and analytics projects, defining modelling standards and aligning data science with product, engineering and commercial goals.

You’ll deliver forecasting, segmentation and propensity models, own end-to-end ML workflows, MLOps, and production-ready AI solutions.

Qualifications

• Experience leading a Data Science team and delivering ML product outcomes.
• Ability to translate analytical outputs into commercial recommendations.
• Hands-on ML delivery alongside leadership responsibilities.

Responsibilities

• Lead and grow the Data Science function, defining standards, frameworks and ways of working.
• Manage, mentor and develop a team of 2 Data Scientists, under the CTO.
• Deliver advanced forecasting, customer segmentation and propensity modelling projects.
• Own end-to-end model development, validation, deployment and MLOps processes.
• Partner with Product, Engineering and Client teams to deliver production-ready Machine Learning solutions.
• Translate analytical outputs into actionable commercial recommendations for senior stakeholders.
• Drive adoption of AI tooling, LLMs and AI-assisted workflows across the function.

Skills

Team leadership

Mentoring

Data science strategy

Stakeholder communication

Tools

Python

SQL

scikit-learn

pandas

NumPy

Snowflake

Databricks

Azure

AWS

GCP

XGBoost

LightGBM

Job description

Are you looking to lead and shape a Data Science function within a growing AI business?

Do you enjoy combining team leadership with hands-on machine learning delivery?

Would you like to influence AI products used by major enterprise organisations?

We're partnered with an AI-powered SaaS business that helps enterprise organisations unlock greater value from their first-party customer data through advanced analytics, machine learning and decision intelligence. The company operates across sectors including Financial Services, Retail, Travel, Telecoms and Healthcare, delivering AI-driven products and insights to well-known enterprise clients. With multiple products already live and additional AI solutions in development, they are continuing to scale their technical capabilities. This role offers the opportunity to build and define the Data Science function while working at the centre of product, engineering and commercial decision-making.

Role

This is a Lead Data Scientist position with responsibility for leading a team of three Data Scientists while remaining hands-on across complex machine learning and analytics initiatives. You'll own modelling standards, delivery processes and data science strategy while driving commercially impactful AI solutions into production.

Responsibilities

• Lead and grow the Data Science function, defining standards, frameworks and ways of working.
• Manage, mentor and develop a team of 2 Data Scientists, under the CTO.
• Deliver advanced forecasting, customer segmentation and propensity modelling projects.
• Own end-to-end model development, validation, deployment and MLOps processes.
• Partner with Product, Engineering and Client teams to deliver production-ready Machine Learning solutions.
• Translate analytical outputs into actionable commercial recommendations for senior stakeholders.
• Drive adoption of AI tooling, LLMs and AI-assisted workflows across the function.

Salary Range: £95,000 base + benefits

Working Model: 4 days per week onsite in Central London

Tech Stack: Python, SQL, scikit-learn, pandas, NumPy, Snowflake, Databricks, Azure/AWS/GCP, XGBoost, LightGBM