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Chems-Eddine Rachdi, Global Lead Data Scientist

Chems-Eddine Rachdi

Global Lead Data Scientist·Nestle Health Science

United Kingdom

Master's degree, Computer Science And Statistics

Work experience

Total years of experience: 10 years, 1 months

Global Lead Data Scientist

January 2025 - Present

Nestle Health Science

Barcelona, Spain •Hybrid

January 2025 - Present

Own global eCommerce data strategy (vision, roadmap, budget 1M CHF), leading delivery of data products across 15+
markets and managing a team of a data scientist, architect, analyst and engineer.
Deployed an API integration with Klaviyo, enabling centralized CRM data and unlocking advanced customer segmentation
and lifecycle activation use cases
Delivered a churn reduction pipeline (feature engineering, ML modeling, deployment), reducing churn by ~20% and
generating 5M CHF incremental revenue.
Built and deployed an end-to-end ML demand forecasting system across DTC and Amazon supply chains, generating 8M CHF
in incremental revenue through optimized inventory positioning, reducing waste and stockouts.
Scaled the data foundation (data pipelines, modeling, source integration), significantly increasing data coverage and enabling
new analytics and activation use cases
Company industry:
Pharmaceutical Manufacturing

Sr. Data Scientist

January 2023 - Present

Nestle Global

Barcelona, Spain •Hybrid

January 2023 - Present

Developed and deployed price optimization solutions across 4 markets, leveraging demand elasticity models to drive revenue
growth
Built a Bayesian Marketing Mix Modeling (MMM) engine, improving marketing budget allocation and ROI through advanced
attribution (Adstock, saturation effects)
Mentored a team of 3 data scientists, providing technical leadership and ensuring delivery of high-impact ML use cases
Partnered with business stakeholders to translate strategic challenges into scalable data science solutions
Company industry:
FMCG

Data Scientist

January 2019 - Present

L'Oreal

London, United Kingdom

January 2019 - Present

Development of a forecasting tool to optimize marketing campaigns (Prophet)

Leverage multiple data sources to create a dashboard to guide e-commerce strategy
(Random Forest)

Use NLP technics to automate consumer emails treatment (Topics modelling, Logistic
regression, Sentiment analysis)

Development of a product recommendation engine (User based collaborative filtering)

Customer clustering : identify client segment to optimize marketing pressure based on
customer behavior (K-means)

Business support : image rights web detection for legal department leveraging Google

API, Websites crawling to create a product dictionary for e-commerce team
Company industry:
Perfume & Cosmetics
Job role:
Research and Development

Data Scientist

January 2018 - May 2026

TF1

Paris, France

January 2018 - May 2026

Conducted statistical analyses to quantify the impact of TV campaigns on advertiser sales, supporting commercial strategy
Company industry:
Media Production
Job role:
Information Technology

Digital Media Consultant

May 2016 - May 2026

Ebiquity

Paris, France

May 2016 - May 2026

Audits : analysis of clients media mix, production and presentation of analysis reports
Company industry:
Marketing
Job role:
Marketing and PR

Data Scientist

January 2019 - January 2023

L’Oreal

London, United Kingdom •Hybrid

January 2019 - January 2023

First data scientist in the team—built the data science function from scratch, defining roadmap and securing stakeholder buy
in
Delivered Marketing Mix Modeling & optimization solutions, improving marketing ROI by ~25%
Developed and deployed CLV and churn models on GCP, increasing retention by +12% and reducing acquisition costs by -8%
Built a recommendation engine, increasing sales by ~20% through improved personalization
Designed a data lake & ingestion pipeline (BigQuery, Cloud Run, Docker) processing 100+ data sources, reducing costs and
eliminating external dependencies
Automated NLP-based customer feedback analysis, saving 9, 000+ hours and £700k annually
Built analytics dashboards and decision tools, saving 3 FTEs/week and improving business visibility
Company industry:
Other Healthcare Services

Data Scientist

April 2018 - October 2018

Wizaly

Paris, France

I found this job using Bayt.com

April 2018 - October 2018

Development and implementation on R of stochastic models via K-nearest neighbors
and Error correction models with cointegration relations for a Sales Forecasting Tool
for online sales estimation
Development and presentation of a Return on ad spend optimization analysis for a
major fashion industry client : analysis of customer behavior and sales
Cohort and customer journey analysis : conversion path, visit length and depth,
conversion rate, new/old clients, new/old visitors, device …
Writing of marketing articles for Wizaly online blog
Company industry:
IT Services
Job role:
Research and Development

MEDIA CONSULTANT

February 2017 - August 2017

EBIQUITY

Paris, France •Hybrid

February 2017 - August 2017

Audits : mix media analysis, production and presentation of clear and intelligible
reports
Digital Agency Pitch : digital technical, trafficking and remuneration fees analysis in
order to highlight the most competitive agency
Company industry:
Marketing
Job role:
Marketing and PR

INTELLIGENCE ANALYST

July 2016 - January 2017

TF1

Paris, France •Hybrid

July 2016 - January 2017

Market researches : client’s competitors’ advertisement investments and revenues
analysis

Task automatization via VBA macro
Company industry:
Media Production
Job role:
Information Technology

Education

Toulouse School of Economics

April 2018

April 2018

Master's degree, Computer Science And Statistics

France

Toulouse School of Economics

January 2018

January 2018

Master's degree, Applied Econometrics

France

Toulouse School of Economics

January 2017

January 2017

Master's degree, Econometrics & Statistics

France

Toulouse School of Economics

April 2016

April 2016

Master's degree, Computer Science And Econometrics

France

Toulouse School of Economics

January 2016

January 2016

Bachelor's degree, Mathematics & Economics

France

Toulouse School of Economics

April 2015

April 2015

Bachelor's degree, Applied Mathematics

France

Skills

Cloud Computing
Expert
Cloud Computing
Expert
Modeling
Expert
Modeling
Expert
Process Simulation
Expert
Process Simulation
Expert
Forecasting
Expert
Forecasting
Expert
MARKETING
Expert
MARKETING
Expert
AUTOMATE
Expert
AUTOMATE
Expert
CLUSTERING
Expert
CLUSTERING
Expert
E-COMMERCE
Expert
E-COMMERCE
Expert
ECONOMICS
Expert
ECONOMICS
Expert
FORECASTING
Expert
FORECASTING
Expert
Modeling
Expert
Modeling
Expert
ADVANCED ANALYTICS
Intermediate
ADVANCED ANALYTICS
Intermediate
BUSINESS CONTINUITY PLANNING
Intermediate
BUSINESS CONTINUITY PLANNING
Intermediate
CREDIT PRODUCTS
Intermediate
CREDIT PRODUCTS
Intermediate
DATA ANALYSIS
Intermediate
DATA ANALYSIS
Intermediate
DATA SCIENCE
Intermediate
DATA SCIENCE
Intermediate
E COMMERCE
Intermediate
E COMMERCE
Intermediate
LEADERSHIP
Intermediate
LEADERSHIP
Intermediate
MARKETING
Intermediate
MARKETING
Intermediate
PRODUCT ROADMAPS
Intermediate
PRODUCT ROADMAPS
Intermediate
SCALABILITY
Intermediate
SCALABILITY
Intermediate

Languages

Arabic
Intermediate
English
Expert
French
Native Speaker

Hobbies

  • Agriculture
  • travelled
  • Travel