
Samuel Lefranc
Data Team Lead | Recommender Systems
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Paris, France
Freelance, ouvert au CDI
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À propos
Introduction
Data Team Lead with 11+ years experience in ML/AI and data architecture across media, marketing, and streaming platforms. Led end-to-end data solutions from ELT pipelines to recommender systems, driving measurable business impact through advanced analytics. Expert in building scalable data infrastructure and ML models for user engagement and performance optimization.
Expérience de travail
Data Team Lead
Free
oct. 2024 - Présent
2 ans 1 mois
Paris, France
Responsible of all data subjects releated to Oqee, the app that enables Free subscribers to watch tv contents : dashboarding and analytics, recommender system, ad targeting, ... Missions : - Improvement of the system of data collection (addition of new devices, monitoring of anomalies, ...) - Setup of an ELT and a Data Warehouse architecture to clean and process tv watching data (using Minio, prefect and Clickhouse) - Design of a recommender system on live and replay/vod contents - Creation of dashboards and analytics tools to monitor the app usage - Handling of Google Analytics tagging and analysis
Lead Data Scientist
Effy
juil. 2021 - oct. 2024
3 ans 4 mois
Paris, France
Research & Development of Machine Learning / Deep Learning Algorithms - Marketing Mix Analysis (to predict the volume of incoming users) - Lead Scoring (to improve the funnel of conversion) - NLP on client feedbacks, audio recordings, .. - Creation of chatbots (for internal and external use) with LLMs - Extraction of informations in documents and images using OCR and Deep Learning Assistance on Data Engineering processes Data Visualization & Dashboarding Work on Data Enrichment with Open Data
Data Scientist
Admo.tv
mai 2019 - juil. 2021
2 ans 3 mois
Paris Area, France
Development of algorithms and methodologies on : - econometrics : estimation of short and long term incremental impact of TV/radio spot broadcasts on website traffic - tv attribution : identify individually these TV visitors among all visitors coming on a website and follow their behaviour along the purchase funnel Development of APIs using Python frameworks (Flask, FastAPI, Dash) Deployment of algorithms running live in production using Docker Data analysis on media and drive to web data
Senior Consultant / Data Scientist
Ekimetrics
sept. 2017 - mai 2019
1 an 9 mois
Management of « Marketing Mix Modeling » analyses (sales optimization through modelling of marketing levers impact) for a top player actor of the automotive industry on several European countries (France, Germany, UK, Spain, Italy, Belgium, Netherlands) + A South American country (Argentina) Data reporting and analysis on CRM activation campaigns for another actor of the automotive industry on a European scope (France, Germany, UK, Spain, Italy)
Media Data Analyst
Médiamétrie
déc. 2013 - août 2017
3 ans 9 mois
Région de Paris, France
1 / Media Data Analyst in the TV/Web Department (June 2014-August 2017) - TV ratings and Web audience analysis - Production of marketing studies based on media consumption and audience behaviour - Management of a client portfolio including France Televisions (the French public national television broadcaster) and France Télvisions Publicité (its advertising agency) 2 / Data Analyst in the Movies Department (December 2013 / June 2014) - Analysis of movies strengths and weaknesses based upon audience reaction and appreciation - Writing of reports for movies distributors
Intern
France Télévisions
mai 2013 - oct. 2013
6 mois
Media analyst in the Studies Department. Work on TV audience scores and audience satisfaction indicators
Intern
Centre national du cinéma et de l'image animée (CNC)
déc. 2012 - janv. 2013
2 mois
Paris, France
Work in the Studies, Statistics and Forecasting Department
Intern
DLR
avr. 2012 - oct. 2012
7 mois
Work on the development on a monitoring process for a GNSS GBAS in order to ensure integrity
Formation
Université Sorbonne Nouvelle
Master of Arts (M.A.)
2012 - 2014
3 ans
ISAE-SUPAERO
Master of Engineering (M.Eng.)
2008 - 2012
5 ans
Université Sorbonne Nouvelle
Bachelor of Arts (BA)
2010 - 2011
2 ans
Portfolio

Lead Scoring

MMM

Chatbot Renovation Energétique

Data Warehouse et ELT
