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Romain LejeuneRL

Romain Lejeune

Data scientist / AI Engineer

€400/day
Le Blanc, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Romain

Data Scientist & AI Engineer - Atypical profile, concrete results
Unique hybrid background: former CEO in the music industry turned Data Scientist. This experience taught me to translate complex business needs into effective technical solutions.
My skills:

Machine Learning & Deep Learning (Python, TensorFlow, PyTorch)
Predictive analysis and natural language processing
Data visualization and reporting
IBM, Stanford, and Google certifications

My approach:
Combine technical rigor with business vision to transform your data into strategic decisions. Accustomed to managing projects from A to Z and working under pressure.
Degrees: Master's in Mathematics/Computer Science + continuing education Harvard X and MIT

French/English - Based in Le Blanc, services available in France
  • French

    Native or bilingual

  • English

    Native or bilingual

  • German

    Conversational

  • Spanish

    Basic

Can work on-site
Le Blanc (up to 50km)

Experience

  • Outlier
    AI Trainer & Data Annotator
    January 2025 - Today (1 year and 7 months)
    Outlier AI - AI Trainer & Data Annotator

    Training AI models using RLHF (Reinforcement Learning from Human Feedback)
    Annotation and labeling of datasets to improve LLM performance
    Qualitative evaluation of AI responses and optimization of learning algorithms

    This is perfect to add to your profile, it shows your practical experience with the latest AI training techniques!
    Data Annotation Fine-tuning Prompt engineering
  • IBM Skills Network
    Data scientist / AI Engineer
    January 2024 - December 2024 (11 months)
    Developed and implemented machine learning algorithms to analyze large datasets and generate actionable insights for decision making. Conducted A/B testing and performance evaluation of AI models to optimize accuracy and efficiency. Leveraged natural language processing techniques to extract valuable information from unstructured data sources and improve business processes.
  • Supernova Publishing
    CEO - Copyright Management
    January 2019 - December 2022 (3 years and 11 months)
    Île-de-France, France
    Spearheaded copyright management strategies to protect artist assets and intellectual property Led the development and implementation of artist development programs to foster talent and drive growth

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Education

  • Data Science Professional
    IBM
    2024
    Data Science Professional
  • AI
    Healthcare Stanford University
    2025
    AI

Skill set

Categories