Principal Data Scientist (London)

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

Principal Data ScientistLondon, UK (Hybrid)Up to 135,000About the CompanyWere working with a next-generation private markets firm that is redefining value creation by combining deep industry expertise with advanced AI and data science. This is a unique opportunity to join a company that partners directly with portfolio companies to drive measurable operational and financial performancepowered by data.Theyre now hiring a

Principal Data Scientist

to lead high-impact analytics and machine learning projects across a wide variety of real-world domains - from manufacturing to customer experience and commercial optimisation. Working closely with a multidisciplinary team, youll have the autonomy to shape technical approaches while staying closely tied to commercial outcomes.This role is ideal for someone who enjoys solving complex, ambiguous business problems using data science, and wants to work at the intersection of technology, investment, and strategy.Key ResponsibilitiesTranslate complex business problems into measurable data science solutions that deliver commercial valueLead the design, development, and deployment of predictive and optimisation models across multiple industriesOwn the end-to-end ML pipeline: data exploration, feature engineering, modelling, evaluation, and deploymentCollaborate with data engineers and MLOps professionals to ensure scalable, production-grade solutionsConduct rigorous A/B testing and performance measurement to validate impactAct as a technical lead within project teams, mentoring mid-level data scientists and guiding model design choicesCommunicate findings and strategic insights to both technical and non-technical stakeholdersAbout YouYoure an experienced data scientist with a proven track record of using machine learning to solve real-world business challenges. Youre just as comfortable in Python as you are in a boardroom, and youre motivated by measurable impact, not just model accuracy.Requirements:5+ years of experience applying data science in commercial settingsProven ability to lead data science projects from concept to productionStrong Python skills (including libraries like Pandas, NumPy, Scikit-learn); experience with other languages is a plusDeep understanding of statistical modelling, predictive analytics, and optimisation techniquesComfortable working with cross-functional teams, including engineers, product leads, and client stakeholdersExperience with A/B testing and causal inference methodologiesBachelors or Masters degree in a quantitative field (e.g., Mathematics, Physics, Engineering, Computer Science)Excellent communication skills and a collaborative mindsetExample Projects You Might Work OnOptimisation models to increase manufacturing throughputPredictive models for asset maintenance and downtime reductionCustomer churn prediction and retention modellingSales optimisation through next-best-action modelsGeospatial analysis to inform store or facility network decisionsSeniority level

Seniority level

Mid-Senior levelEmployment type

Employment type

Full-timeJob function

Job function

Analyst, Science, and EngineeringIndustries

IT Services and IT Consulting and Financial ServicesReferrals increase your chances of interviewing at Harnham by 2xGet notified about new Data Scientist jobs in

London Area, United Kingdom

.London, England, United Kingdom 2 weeks agoLondon, England, United Kingdom 2 days agoLondon, England, United Kingdom 5 days agoLondon, England, United Kingdom 2 weeks agoGreater London, England, United Kingdom 4 weeks agoLondon, England, United Kingdom 2 days agoLondon, England, United Kingdom 1 day agoLondon, England, United Kingdom 1 week agoData Scientist, Internship, United Kingdom - BCG X

London, England, United Kingdom 3 days agoData Scientist Data Science Analytics and Enablement (DSAE)

London, England, United Kingdom 2 weeks agoLondon, England, United Kingdom 4 weeks agoGreater London, England, United Kingdom 1 week agoLondon, England, United Kingdom 5 days agoLondon, England, United Kingdom 4 weeks agoWoking, England, United Kingdom 2 days agoLondon, England, United Kingdom 6 days agoLondon, England, United Kingdom 3 weeks agoLondon, England, United Kingdom 3 days agoLondon, England, United Kingdom 1 week agoLondon, England, United Kingdom 5 days agoLondon, England, United Kingdom 2 weeks agoMarketing Data Scientist Digital Business London

London, England, United Kingdom 65,000.00-75,000.00 1 month agoWere unlocking community knowledge in a new way. Experts add insights directly into each article, started with the help of ..... full job details .....