
Nathan Lorber
Lead AI Engineer
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Strasbourg, France
Freelance, ouvert au CDI
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Introduction
AI/ML Engineer with 3+ years of experience designing and deploying ML and LLM systems end-to-end, from data pipelines to production serving. Core expertise in NLP, classification on imbalanced datasets (XGBoost), retrieval systems (RAG, hybrid search), and agentic LLM architectures (LangGraph, MCP). Most recently Lead AI Engineer at MyUnisoft, where I built a multi-class transaction classifier reducing manual categorization by 70%, led AI governance, and ran cross-functional workshops.
Expérience de travail
Lead AI Engineer
MyUnisoft
sept. 2025 - Présent
1 an 2 mois
À distance
As MyUnisoft's AI referent within the Product & Technology department, I drive AI strategy, governance, and hands-on ML development for a SaaS platform serving accounting firms. • Design and develop ML classification models (XGBoost) on tabular business data, handling the full pipeline from data exploration and feature engineering through model optimisation and delivery for production integration. • Establish the company's AI governance framework for generative AI tools across the organisation. • Lead bimonthly AI workshops for both technical and non-technical audiences (up to 50 attendees), driving company-wide adoption of AI tools and best practices. • Serve as AI advisor to cross-functional teams (Product, R&D, Customer Success), providing technical feasibility assessments, solution scoping, and hands-on guidance for AI-driven features. • Maintain continuous technology watch on LLMs, generative AI APIs, and ML frameworks to inform the product AI roadmap.
Data Scientist
majelan X
avr. 2023 - août 2025
2 ans 5 mois
À distance
• Developed a Retrieval Augmented Generation (RAG) recommendation engine utilizing GPT and NLP technologies. • Implemented an ELT pipeline using Airbyte, Snowflake, and dbt through Infrastructure as Code with Terraform. • Conducted Python codebase retro-engineering, maintenance, and expansion to enhance system performance. • Defined and implemented business KPIs to drive data-informed decision-making at majelan X.
Data Scientist – Training
OpenClassrooms
janv. 2021 - janv. 2022
1 an 1 mois
• Conducted data exploration and cleaning using NumPy and Pandas across diverse sectors including education and health administration. • Developed machine learning models employing supervised and unsupervised algorithms with Scikit Learn, TensorFlow, and Keras. • Built APIs with FastAPI and interactive dashboards using Streamlit for enhanced data visualization and accessibility.
Research Intern
Centre national de la recherche scientifique
janv. 2021 - janv. 2021
1 mois
Tracker geometry optimization and tracking performance at the Future Circular Collider FCC International Jamboree guest speaker
Teacher
Fusion Academy
janv. 2017 - janv. 2019
2 ans 1 mois
Los Angeles Metropolitan Area
Teaching math and science at middle school and high school level
Formation
CentraleSupélec
Data Science
2021 - 2022
1 an 1 mois
Project-oriented Data Scientist curriculum: - Data cleaning - Exploratory data analysis (uni- and multivariate) - Dimensionality reduction - Supervised and unsupervised model training, hyperparameter optimisation, performance evaluation - Deep learning processing on textual and visual data - API and dashboard deployment - Code versioning (Git) - Big Data model deployment, distributed computing (AWS) Librairies : - Numpy, pandas, scikit-learn - Matplotlib, seaborn, plotly, shap - Tensorflow, Keras, LightGBM, XGBoost - FastAPI, streamlit, gunicorn - Pyspark
University of Strasbourg
Master's degree, Elementary Particle Physics
2020 - 2021
1 an 1 mois
Résultat : Cum Laude (mention Bien)
Aix-Marseille University
Master of Science - MS, Physics
2019 - 2020
1 an 1 mois
International American University
Associate of Science - AS, Business Administration and Management, General
2017 - 2019
2 ans 1 mois
Boston College
Bachelor's degree, Physics
2012 - 2013
1 an 1 mois
Activités et associations : Minor in Classical and Jazz Composition
Senior year of BS as a Foreign Exchange Student
University of Strasbourg
Bachelor of Science - BS, Physics
2010 - 2013
3 ans 1 mois