Julien Chaplet
Data Scientist, MLOps, GenAi
Salaire / Taux journalier
Paris, France
Freelance, ouvert au CDI
Peut venir sur site
Expertises
Langues
À propos
Introduction
Diplômé de l'Ecole Centrale Lille et de l'ENSTA en mathématiques appliquées à la finance, puis d'un titre RNCP en Machine Learning Engineering, je dispose de plus de 10 ans d'expérience dans la modélisation de données et l'IA, au sein de divers secteurs d'activité. Je suis en mesure de réaliser vos projets sur l'ensemble de leur cycle de vie: - nettoyage et enrichissement des données - analyse et visualisation - implémentation des algorithmes les plus adaptés à vos besoins - mise en production
Expérience de travail
Lead Data Scientist
Natixis
sept. 2025 - Présent
1 an 2 mois
Paris, France
Developing AI projects including: • application which monitors operational risk through the press (LLM-based classifier) • tool that benchmarks the bank against other institutions on operational risk incidents
Data & AI instructor
OMNES EducationFreelance
sept. 2024 - Présent
2 ans 2 mois
Paris, France
Conducting hands-on practical workshops on various data-related topics for students from diverse academic backgrounds, including engineering, business, communication, and political science. Key topics covered include: • Programming : Python for Data Science & ML (Scipy, Pandas, Keras, etc.), SQL and database management • Data Analytics & BI : Dashboard design and development with Power BI & Looker Studio • GenAI : Foundations, prompt engineering and best practices • NoCode : Automation with Make, digital marketing automation with Hubspot CRM • Data Literacy and Data Product Management
Index Futures & Options Proprietary Trader
Self-employedFreelance
juil. 2013 - août 2025
12 ans 2 mois
Paris, France
• Designing, backtesting and deploying systematic trading strategies on index Futures and Options • Developing tools to monitor risks and returns • Studying research papers to implement machine learning and deep learning strategies. Examples: ▫ time series prediction with wavelet transform, encoder/decoder then LSTM ▫ LLM agent to extract sentiment from various sources via LangGraph • Accounting, annual reviews and other tasks related to my entrepreneur status
Lead Data Scientist
HabitatprestoFreelance
nov. 2023 - janv. 2024
3 mois
Paris, France
Development of a generative AI based leads generator chatbot "from scratch" : • Front end and back end using OpenAI API • Prompt engineering and embeddings of a knowledge base • Extracting lead information from the conversation in JSON format
Data Product Manager
MesDépanneurs.frFreelance
juin 2023 - déc. 2023
7 mois
Paris, France
• In charge of data integrity during a system migration: analysis, visualization, pattern recognition, Agile data product management • Responsible for data products and data engineering : dashboards design and automation for operational teams and CFO, audit of data usage across the various business units and automation of data pipelines (ETL)
Data Scientist
FoxintelligenceFreelance
oct. 2022 - févr. 2023
5 mois
Paris, France
• Fine-tuning ML text classification models • Designing business rules (with RegEx) to improve the results -> classification results improved by 20%
Societe Generale
mars 2011 - mars 2013
2 ans 1 mois
Londres, Royaume-Uni
Precious Metals Options Trader
mars 2012 - mars 2013
1 an 1 mois
Londres, Royaume-Uni
• Market making of precious metals options: building volatility curves, quoting and hedging customers’ requests • Managing precious metals SG book: running risk analysis, doing the gamma, handling the expiries, managing the order book, establishing trading strategies … • Developing tools to improve positions and risks management
Emerging Markets Fixed Income & FX Trader Assistant
mars 2011 - mars 2012
1 an 1 mois
Londres, Royaume-Uni
• Funding SG Treasury positions • Quotation of FX Swaps, Interest Rate Swaps, Cross Currency swaps • Assisting senior traders in their daily tasks • Developping pricers, risk management tools and liquidity models
Funds Derivatives Risk Analyst
Credit Agricole CIB
avr. 2010 - janv. 2011
10 mois
• Daily and monthly P&L explanation by sensibilities to market parameters • Analysis of VAR, sensibilities, stress scenarii; • New deals impact computation • Control of payoffs and pricing models
Structured Products Secondary Market Trader Assistant
BNP Paribas CIB
juin 2009 - déc. 2009
7 mois
Paris, France
Daily valuation, price explanation, quotation on sales’ requests, Excel/VBA development
Quantitative Developer
Societe Generale Corporate and Investment Banking - SGCIB
juin 2008 - août 2008
3 mois
Paris, France
Development of a tool (in Python) performing derivatives pricers non-regression testing
Formation
DataScientest.com
Master's degree equivalent (level 7)
2023 - 2023
6 mois
Mines Paris - PSL
Data Scientist certification
2022 - 2022
5 mois
ENSTA
Master of Science
2008 - 2009
1 an 1 mois
University of Paris I: Panthéon-Sorbonne
Master of Science
2008 - 2009
1 an 1 mois
Centrale Lille
Ecole d'Ingénieur (Master's degree)
2006 - 2009
3 ans 1 mois
Lycée Marcelin Berthelot
Classes préparatoires
2003 - 2006
3 ans 1 mois