Lead Data Scientist

Harnham; Greater London; On-site; GBP 70,000 - 85,000; Full time

Job summary

A high-growth performance marketing and technology company is seeking a Lead Data Scientist to drive advanced machine learning and analytics solutions. This role involves leading projects, mentoring a team, and collaborating with various departments to achieve business outcomes. Ideal candidates will have strong technical skills in Python, SQL, and experience with cloud platforms. This is a full-time position based in London.

Qualifications

• Strong technical skills in Python, SQL, and cloud platforms.
• Experience deploying machine learning models into production.

Responsibilities

• Lead and implement data science solutions in predictive modeling and optimization.
• Mentor junior data scientists and establish best practices.

Skills

Python

SQL

Machine Learning

Communication

Tools

GCP

AWS

BigQuery

Snowflake

Redshift

Job description

Get AI-powered advice on this job and more exclusive features.

This range is provided by Harnham. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more.

Base pay range

Direct message the job poster from Harnham

Building Data Science and Machine Learning Teams in the UK | The Talent Driving The Data and AI Revolution

Lead Data Scientist

Up to £85,000

About the Role

We are working with a high-growth performance marketing and technology company seeking a new Lead Data Scientist to join their team.

This role involves working at the intersection of data, technology, and marketing, leading the delivery of advanced machine learning, optimization, and analytics solutions to achieve measurable business outcomes.

Reporting directly to the Director of Data, you will own high-impact projects such as customer lifetime value, predictive modeling, bidding optimization, and experimentation, while also acting as a data lead for major clients.

Initially hands-on, this position will evolve into a strategic leadership role, with team management responsibilities (starting with three Data Scientists, expanding to five within a year) within the first six months.

Key Responsibilities

• Lead and implement data science solutions in predictive modeling, optimization, and experimentation.
• Serve as a strategic data partner to key clients, overseeing technical delivery and ensuring high-quality results.
• Design and deploy machine learning models and optimization algorithms in production environments.
• Collaborate with engineering, marketing, and analytics teams to embed data science into campaign strategies and tools.
• Mentor junior data scientists, establishing best practices and scalable workflows.
• Contribute to the growth and shaping of the data science team within the broader business.

What We’re Looking For

• Strong technical skills in Python (Pandas, NumPy, Scikit-learn), SQL, and cloud platforms (GCP or AWS).
• Experience with modern data warehouses (BigQuery, Snowflake, Redshift).
• Proven track record of deploying machine learning models or optimization algorithms into production.
• Solid understanding of digital marketing concepts, platforms (e.g., Google Ads, Meta), and analytics tools.
• Experience with key use cases such as propensity scoring, lead prioritization, budget allocation, bidding optimization, and advanced analytics (e.g., marginal returns curves, supply-demand modeling).
• Excellent communication skills to simplify complex technical concepts for stakeholders.
• Leadership potential with a willingness to mentor and develop others.

Please note, this role does not offer sponsorship.

Seniority level

• Mid-Senior level

Employment type

• Full-time

Job function

• Analyst, Engineering, and Science

Industries

• IT Services and IT Consulting

Referrals can double your chances of interviewing at Harnham. Sign in to set job alerts for “Data Scientist” roles.

Locations include London, England, United Kingdom, with recent postings from 1 week ago to 4 weeks ago.