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Senior Data Scientist
Fashion retailer
London (2-3x days a week in office)
£85,000 + Bonus + Benefits

THE ROLE:

Harnham is working with a leading fashion retailer in the UK who are looking to add a Senior Data Scientist to their UK team.

The focus of this new investment is to introduce cutting-edge machine learning to the business, solving problems across the company.

Projects will include: performance marketing (attribution modelling / market mix modelling), customer behaviour analysis, supply chain optimisation and dynamic pricing strategies.

WHAT YOU NEED:

• A solid understanding of both supervised and unsupervised machine learning techniques
• A passion for solving complex commercial problems with a data-driven modelling approach
• Strong communication skills
• An MSc or equivalent in a STEM subject
• Strong skills in Python and SQL
• Cloud experience
• Experience in deploying, scaling and maintaining machine learning models in production.

THE BENEFITS

You can earn up to £85,000 + bonus + benefits in this position.

HOW TO APPLY

To be considered for this exciting opportunity, please submit your details using the Apply button on this page. For more information about similar roles please contact Nick Mandella at Harnham.

KEYWORDS

Python, SQL, Data Scientist, Data Science, Machine Learning, Retail, Customer, marketing, Data, AI. Databricks, azure, MLOps.

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Data Scientist (Marketing)

3x day per week in office (London)
Telco
£45,000 – £50,000 + Equity

OVERVIEW

At Harnham we’re working with a tech start-up in London who are looking for a Data Scientist to help lead their efforts in performance marketing and customer behaviour analysis.

They have an established data team within the organisation tackling a range of problems, and are growing their data science team to help bring a more sophisticated approach to key areas.

There is a fun and relaxed culture, as well as a passion for using data to help companies in the financal services space make better decisions and maximise their ROI from marketing efforts!

This is one of a few roles they’re hiring for in 2025 – so a great time to join!

THE ROLE

You will be:

• Helping to lead data science efforts related to marketing problems and customer behaviour for the company (e.g. segmentations, propensity modelling, LTV, market mix modelling, attribution modelling etc).
• Help promote the company’s data-driven culture
• Work closely with other teams including engineering, product, pricing and CRM
• Come up with creative ways for the company to get results using data
• Pushing the boundaries and exploring new and innovative techniques

SKILLS AND EXPERTISE

You must have:

• A BSc or MSc in a STEM subject (e.g. Maths, Stats, Computer Science, Physics etc)
• Experience programming with Python
• Knowledge of a database query language (SQL preferred)
• Experience in using machine learning to solve customer/marketing-related problems

SALARY

In this role you could earn up to £50,000 + benefits.

HOW TO APPLY

To be considered for this exciting opportunity, please submit your details using the Apply button on this page. Or for more information regarding other roles please contact Nick Mandella at Harnham.

KEYWORDS

Python, SQL, machine learning, Data Scientist, Data Science, analyst, analytics, data, AI, customer, marketing, attribution.

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DATA SCIENTIST SENIOR
PARIS (75)
70-75K€

Cette entreprise technologique française recherche son Data Scientist Senior pour renforcer son positionnement technologique et d’accélérer le développement de ses produits. La société investit énormément dans la structuration de son pôle Data. Leur ambition ? Intégrer des profils expérimentés capables d’exploiter les leviers de l’Intelligence Artificielle pour développer des solutions de pointe, robustes et intelligentes, au service de la protection des systèmes d’information.

VOTRE RÔLE

Rattaché au Head of Data et en lien direct avec le cofondateur, vous interviendrez sur des problématiques à fort enjeu stratégique et technique. En tant que Senior Data Scientist, vous jouerez un rôle clé dans la structuration des projets data et dans l’implémentation de solutions de Machine Learning. Vos missions principales:

• La construction et l’optimisation de pipelines de Machine Learning
• Le cadrage et la modélisation de problématiques de régression linéaire, logistique ou de classification
• La mise en production de modèles robustes, adaptés aux besoins produits
• L’accompagnement technique de l’équipe sur la prise de recul méthodologique et algorithmique
• La collaboration étroite avec les équipes produit et tech dans un environnement agile
• À noter : les sujets de type RAG, NLP ou les approches de LLM ne sont pas au cœur des enjeux actuels.

VOTRE PROFIL

• Vous justifiez d’une expérience significative (4 ans minimum post diplôme) sur des projets concrets de Data Science ou de Machine Learning classique (régression, classification)
• Vous avez une excellente maîtrise des outils et langages data (Python)
• Vous avez une solide culture algorithmique et un fort recul technique sur les modèles
• Vous êtes capable de construire des pipelines performants, propres et industrialisables
• Vous êtes autonome, structurée, et aimez collaborer dans des environnements exigeants
• Une expérience dans des contextes industriels ou produits tech est un plus

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To Apply for this Job Click Here

DATA SCIENTIST – CDI

UP TO 62K€ FIXE

PARIS – HYBRIDE

Une entreprise startup qui développe un logiciel de computer vision pour les entreprises recherche un data scientist. Si l’environnement startup et le domaine de la mode vous intéresse, alors cette offre est faite pour vous !

LE POSTE

Rattaché au Head of data science, vous dirigerez des projets clés pour l’entreprise en développant des solutions de données industrialisées qui seront ensuite utilisées en interne ou accessibles par les clients. Vous serez en charge de l’extraction des données jusqu’à la traduction en insights.

Vos missions au quotidien :

• Participer au développement de produits d’analyse de données robustes
• Contribuer à la construction de la boîte à outils data science pour rendre les processus plus efficaces
• Être le référent sur les données et les indicateurs fournis aux clients
• Explorer les données pour extraire des insights et améliorer la méthodologie des processus

VOTRE PROFIL

• Bac+5 diplôme en école d’ingénieur ou université
• 3 ans d’expérience dans le domaine data science
• Familier avec les problématiques liées aux grandes données et aux solutions cloud (Snowflake, AWS Redshift)
• Bonne expérience en industrialisation et intégration de données
• Maîtrise de Python, SQL, BigQuery et Docker pour la mise en production
• Français et anglais courants obligatoires

POUR POSTULER

Merci de joindre votre cv à jour.

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SENIOR DATA SCIENTIST

£55,000-75,000 + 12% BONUS

WEST LONDON 3 DAYS A WEEK

This is an excellent opportunity to work in a leading customer analytics company who own one of the most efficient Data Science and Consultancy functions. As a Senior Data Scientist, you will be working to break down and analyse clients FMCG / retail customer data using a tech stack that is based around Python/PySpark and SQL.

THE COMPANY

As a Senior Data Scientist in this company, you will get to work with some massive clients within the FMCG / retail sectors using advanced modelling to understand their customer base. This is an opportunity to work amongst talented individuals across a wide range of projects in a fast-paced environment.

THE ROLE

As a Senior Data Scientist, you will be working with leading retailers in the FMCG / retail sector as they aim to improve their knowledge and understanding of their customer base. You will be using advanced modelling techniques such as regression, propensity, churn and chaid analysis using a tech stack based around Python/PySpark and SQL.

You will be working on a consultancy basis, using statistical modelling to solve client’s problems using your excellent problem-solving skills. As well as this, you will be using advanced technology to increase clients understanding of their customers.

YOUR SKILLS AND EXPERIENCE

The successful Data Scientist will have the following skills and experience:

• Experience working with Customer Data and statistical modelling
• Advanced commercial experience using SQL, Python/PySpark and Hadoop to build models such as Propensity and Clustering (K-means, Random Forest)
• Commercial experience within the FMCG / Retail industry is desirable
• Excellent communicational skills
• Experience working in a consultancy environment is desirable
• Educated to degree level in a STEM subject or similar

THE BENEFITS

The successful Data Scientist will receive a salary between £55,000 and £75,000. In addition to this, they shall receive an extensive benefits package, including your birthday off, early Friday finishes and 12% bonus.

HOW TO APPLY:

Please register your interest by sending your CV to Dylan Butcher via the Apply link on this page.

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Data Scientist

Amsterdam, The Netherlands

Hybrid

Are you looking to join a company where you can apply advanced data science in a focused, intellectually curious environment?

The Company

This is a globally active organization working at the forefront of leadership development, organizational advisory, and strategic talent solutions. Our multidisciplinary team brings together experts in psychology, business strategy, analytics, and technology to unlock the potential of leaders and organizations around the world. We value deep thinking, purposeful innovation, and meaningful outcomes over public recognition.

The role

As a Data Scientist you’ll work at the intersection of machine learning, organizational psychology, and leadership science. You´ll collaborate closely to develop impactful solutions leveraging AI, NLP, and predictive analytics. Your work will inform executive decisions, shape leadership strategies, and support complex organizational transformations.

• Identify high-impact opportunities for ML/AI across internal tools and client-facing products
• Design, test, and deploy advanced models (especially NLP and AI-based) to address nuanced leadership and organizational challenges
• Collaborate cross-functionally to embed data-driven insights into products and services
• Contribute thought leadership and subject-matter expertise across data science, leadership strategy, and analytics innovation
• Stay current with advances in ML, AI, and behavioral science to guide best practices
• Bring an entrepreneurial mind set to the table and define new AI opportunities within the business.

Skills and Experience

• Strong track record in machine learning, NLP, and AI application-Bayesian modeling is a plus
• Proficient in Python (preferred), R, or similar languages and ML frameworks (e.g., TensorFlow, PyTorch)
• Exceptional analytical and problem-solving skills; meticulous attention to detail
• Experience or interest in leadership science, organizational psychology, or social science research
• Able to translate technical concepts to non-technical stakeholders with clarity and empathy

Think this could be the right fit? We’d love to hear from you. Apply now via the button on this page.

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To Apply for this Job Click Here

Senior Data Scientist – Remote (1 day a month London)

We are working with a large telecoms company who are looking to add a Senior Data Scientist with strong experimentation experience to manage a team of 2 data scientists across their core platforms including Marketing, CRM, and Consumer data. The company have a range of product offerings and a 5 million customer base. They work on attribution, propensity, customer churn and recommender models.

Requirements:

• 4+ years Data Science experience
• Experimentation Experience (AB testing)
• Ability to manage and mentor a small team
• Strong Python and SQL (live coding test involved)
• Consumer data experience
• Marketing experience is a plus

To Apply for this Job Click Here

To Apply for this Job Click Here

AI Engineer / ML Engineer – CRYPTO – REMOTE

We are collaborating with a cryptocurrency analytics firm that assists clients in identifying market opportunities, conducting due diligence, and protecting portfolios. The company is expanding its strategic capabilities in AI & ML.

They are seeking a skilled and driven Senior AI/ML Engineer to join their team. In this position, you will design and manage AI models to process extensive blockchain data, identifying patterns and insights that guide decision-making for cryptocurrency investors. As a Senior AI/ML Engineer, your work will be essential in enhancing the platform’s functionality, ensuring the delivery of a cutting-edge product to users. Your expertise will be instrumental in influencing the technology’s evolution and solidifying the company’s status as a leader in blockchain analytics.

You will need:

• Spearhead the design, implementation, and deployment of AI/ML models to analyze blockchain data, ensuring optimal performance and scalability.
• Work alongside product managers and engineers to integrate AI/ML models into the platform, boosting its analytical capabilities and enhancing the user experience.
• Stay up-to-date with the latest advancements in AI/ML and blockchain technologies, applying creative solutions to tackle complex challenges.
• Mentor junior engineers and foster best practices in AI/ML development within the team.
• Collaborate with cross-functional teams to ensure AI/ML projects align with business goals and customer requirements.

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