Christelle Marfaing
Fractional Head of Data and AI | Strategist
Salaire / Taux journalier
Paris, France
Mobilité : Lyon, Paris
Freelance
Peut venir sur site
Expertises
Langues
À propos
Introduction
Fractional CDO/Head of data with 10+ years transforming data strategies and building data products for startups and scale-ups. Led teams from 0 to 15+ across analytics, ML engineering, and AI, driving production-ready GenAI systems and advanced data platforms. Expert in building scalable data infrastructures with proven track record at fintech leaders like Lydia and May.
Expérience de travail
Fractional CDO - Data and AI Executive
Nuwa - Data Solutions & AdvisoryFreelance
sept. 2025 - Présent
1 an 2 mois
Paris, France
Co-Founder
Modern Data Network
juil. 2023 - Présent
3 ans 4 mois
Paris, France
Data community (Slack, Medium, Events) Motto: "Accelerating careers, shaping the future of the French data industry. Together."
Chief Data & AI Officer (CDO)
May
mars 2023 - oct. 2025
2 ans 8 mois
Paris, France
Leading and managing the data team in an early-stage startup through an hybrid role: - CTO with full autonomy over the core data product: Led the transition from R&D prototypes to scalable production systems, including GenAI, machine learning, and advanced data mining applications serving both May’s core product and external clients (vLLM, vector databases, retrieval pipelines). - Data team manager: managed and supported the data team in charge of building and operating the data stack to support analytics and self-service access. - Executive team member: collaborated closely with the CEO and leadership team to shape company strategy.
Lydia
oct. 2018 - mars 2023
4 ans 6 mois
Région de Paris, France
Head of Data
juin 2019 - mars 2023
3 ans 10 mois
Région de Paris, France
Managed and led a team of 12-15 members, including three specialized sub-teams: Analytics Engineering, Data Science, and Data/ML Engineering. Collaborated with C-level executives to define the team's roadmap. Acted as a technical lead on key projects while maintaining a strategic focus on data challenges and team organization.
Data Scientist
oct. 2018 - juil. 2019
10 mois
Paris et périphérie
Designed and implemented data ingestion pipelines for external data. Developed machine learning models for fraud detection and email categorization.
Data Science Consultant
Keyrus Capital Markets
oct. 2017 - oct. 2018
1 an 1 mois
Région de Paris, France
Completed a long-term mission as a data science consultant at Natixis, where I led the establishment of a new data lab within the insurance division. I developed various proof-of-concepts and models for churn detection, marketing analysis, and anomaly detection, and facilitated workshops with business units to identify and prioritize use cases.
Data scientist
Deepki
avr. 2016 - oct. 2017
1 an 7 mois
Paris, France
Developed machine learning models on energy consumption data (hourly time series consumption data and invoices) and automated their integration into client apps.
Junior yield management analyst
SNCF
mars 2015 - août 2015
6 mois
La défense
Conducted demand analysis to inform the adaptation of train portfolio pricing. Led marketing analysis efforts.
Chargée d'étude junior
ERDF
sept. 2014 - mars 2015
7 mois
Région de Paris, France
Designed and developed tools to evaluate various investment scenarios on the electricity network.
Research Assistant
Grantham Research Institute on Climate Change and the Environment (GRI)
mai 2014 - août 2014
4 mois
Londres, Royaume-Uni
Development of an interface to ingest and display data from remote sensors.
Formation
ENSTA
Ingénieur
2012 - 2016
5 ans
École nationale des ponts et chaussées
Master 2 (M2)
2015 - 2016
11 mois
Aux Lazaristes
classe préparatoire aux grandes écoles
2010 - 2012
3 ans
Portfolio
