You're seeing this page as if you were . The main menu is still yours, though. Exit from immersion
Théo DemessanceTD

Théo Demessance

Data Scientist

€700/day
Paris, FR
3-7 years

Average response time: 1 hour

About Théo

Ingénieur diplômé en France et en Chine, j’interviens sur l’ensemble de la chaîne de valeur data : de l’exploration à la mise en production. Habitué aux environnements exigeants (sport de haut niveau inclus), je privilégie rigueur, communication claire et efficacité collective.

Mon parcours combine une expérience opérationnelle en grande distribution en tant que Data Scientist (modélisation, industrialisation, impact métier) et une expertise en architecture acquise chez MongoDB en tant que Solutions Architect. Je travaille aussi bien sur des problématiques techniques profondes que sur l’alignement entre équipes métiers et IT.

Cette double compétence me permet d’intervenir sur différents types de missions :
- Data Scientist – modélisation, machine learning, optimisation, déploiement de modèles
- Data Analyst – analyse exploratoire, structuration de KPIs, aide à la décision, construction de dashboard
- Architecte Data – conception d’architectures scalables, modélisation de données, optimisation des performances
- Développeur Python – développement backend, pipelines de données, APIs, scripts d’automatisation

Mon objectif : livrer des solutions robustes, compréhensibles et orientées valeur business.
  • French

    Native or bilingual

  • English

    Fluent

  • Spanish

    Fluent

  • Chinese

    Conversational

Can work on-site
Paris (up to 15km)

Experience

  • MongoDB
    Solutions Architect
    TECH
    June 2025 - November 2025 (5 months)
    Paris, France
    Solutions Architect / Pre-sales : Designer des solutions pour les clients, en adaptant leur exigences techniques à celle de MongoDB
  • Groupement Les Mousquetaires - Stime
    Lead Data Scientist
    RETAIL (SMALL BUSINESS)
    September 2022 - Today (3 years and 9 months)
    92320 Châtillon, France
    • Collaborate with the upstream internal stakeholders (finance, quality, energy, HR departments), understanding their problems and design an adapted data science solution
    • Manage a team of Scientists, Machine Learning engineers and Big Data specialists
    • Experiment, test and align new data technologies with business objectives
    • Participation and presentation of internally developed solutions at international conferences (World AI Cannes Festival, Big Data & AI Paris, ...)
    Machine learning Python (Programming Language) IA générative Microsoft Azure MLOps
  • Groupement Les Mousquetaires - Stime
    Data Scientist
    RETAIL (SMALL BUSINESS)
    February 2021 - September 2022 (1 year and 7 months)
    92320 Châtillon, France
    • Development and deployment of a 12-week multi-models cash flow forecasting web-app to save millions euros per year
    • Daily provision of financial data via the development of an ETL process while ensuring security by using encryption algorithms
    • Co-developed pAInt, an LLM-powered assistant expert in DIY for Bricorama, improving client engagement by 18%.
    • Availability of machine learning algorithms via the development, orchestration and monitoring of Databricks jobs using a Rest API enabling a 30% reduction in computing time.
    • Modeling, scripting and interfacing of extraordinary events of different impacts to be taken into account in the prediction
    • Modeling an ad-hoc reporting support application on MicroStrategy to deepen analysis and decision making
    Python (Programming Language) Azure Databricks Azure Data Factory Kubernetes IA générative

Recommendations

Be the first to recommend Théo

Help this freelancer shine by sharing your experience working together.

These freelancer profiles also match your criteria

AgathaA

Agatha Frydrych

Backend Java Software Engineer

4.7

(3)

2

BaptisteB

Baptiste Duhen

Fullstack developer

4.6

(4)

5

AmedA

Amed Hamou

Senior Lead Developer

4

(2)

7

AudreyA

Audrey Champion

Web developer

4.3

(3)

4

Education

  • Master of Engineering
    Tianjin University
    2022
    Master Degree, Software Engineering
  • Master degree, Mathematics and Computer Science
    ESILV - Ecole Supérieure d'Ingénieurs Léonard de Vinci
    2021
    Master degree, Mathematics and Computer Science

Skill set (21)

Categories