Freelancer profile translated to English.
Back to original languageAbout Yohan
You have data but not the time (or the tools) to leverage it? I'll take care of it.
For 6 years, I've been transforming data into concrete tools: management dashboards, automations that eliminate manual tasks, and AI models that inform decisions. First at the CEA (3 years), now as a freelancer for SMEs and startups.
What I can do for you:
→ Automate your processes — Do you spend hours on Excel copying, reprocessing, formatting? I create Python scripts that do the work in seconds, where it used to take days manually.
→ Create your dashboards and management tools — Clear, up-to-date, and accessible indicators to manage your business at a glance.
→ Integrate AI into your business — Intelligent chatbots, automatic document analysis, scoring, anomaly detection. I master LLMs and classic machine learning.
→ Develop your web and SaaS applications — Custom business tools, e-commerce platforms, APIs. I develop complete solutions in Django and FastAPI, from the database to the user interface.
→ Analyze your data — Cleaning, structuring, modeling, visualization. Scientific background (Master's in Data Science, co-authored publication in the Journal of Clinical Medicine).
My stack: Python, SQL, Pandas, scikit-learn, Streamlit, Django, FastAPI, Plotly, LLM APIs, Excel/VBA, Git, Docker.
My advantage: Former high-level athlete in the French national team (para-swimming, World Cup medals). I know discipline, rigor, and pressure management.
Portfolio and demos online: yohan-mahistre.pages.dev
French
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- Freelance / IndépendantFreelancer — Data Scientist & Python DeveloperTECHMay 2022 - Today (4 years and 3 months)Sassenage, FranceFreelance missions in data science, Python development, and AI for SMEs, startups, and organizations.Interactive commercial management and activity tracking dashboards (Streamlit, Plotly)Automation of Excel processing and reporting (Python, Pandas, VBA)Development of web tools: Django e-commerce, FastAPI APIsAI integration: intelligent chatbots, automatic document analysis (LLM, NLP)Statistical analysis and predictive modeling (scikit-learn, SQL)
- Commissariat à l'énergie atomique et aux énergies (CEA)Data AnalystRESEARCHAugust 2021 - August 2024 (2 years and 11 months)Grenoble, France
- Data: cleaning, preparation, visualization.
- Team Support: assistance with Excel automation (VBA/Python) and database queries.
- Automation (RPA): Python scripts for repetitive tasks. Reduction of manual operations in Excel.
- Application Development: small business tools and lightweight interfaces to speed up analysis workflows.
- Stack: Python, Pandas, NumPy, Matplotlib/Plotly, SQL, Git, Docker.
- Laboratoire HP2Effects of intermittent hypoxia and intensive trainingMEDICALOctober 2017 - March 2018 (5 months)Grenoble, France
- Analysis: participation in statistical analysis of data related to sleep apnea.
- Data: cleaning, structuring, and traceability of datasets; project schedule updates.
- Modeling: basic predictions and reliability evaluation (cross-validation, robustness).
- Tools: Python/R, Pandas, NumPy/SciPy, scikit-learn, visualization.
Reviews
G
Guillaume
Direction - SODAP
Reviewed on 4/17/2026
Yohan is attentive to needs and structured in project execution.
He is agile, available, and also proactive in offering solutions.
The work done is very professional, and the delivered dashboards meet expectations.
Adrien
Sorbonne
Reviewed on 8/29/2022
Excellent work as always.
The more I work with Yohan, the more I enjoy this partnership.
Recommendations
Be the first to recommend Yohan
Help this freelancer shine by sharing your experience working together.
These freelancer profiles also match your criteria
Agatha Frydrych
Backend Java Software Engineer
4.7
(3)
2
Baptiste Duhen
Fullstack developer
4.6
(4)
5
Amed Hamou
Senior Lead Developer
4
(2)
7
Audrey Champion
Web developer
4.3
(3)
4
Education
- Master's in Statistics and Data ScienceIM2AG - University of Grenoble Alpes2020• Data Science : Statistiques Descriptives/Inférentielles, Modélisation, Analyse des Données, Big Data • Machine Learning, Deep Learning • Database Management • Programmation (R, SAS, Python, C++, Julia) • Sondage • Séries Temporelles • Géo Statistique • Recherche Opérationnelle • Fiabilité • Gestion de Projet
- Bachelor's in Mathematics and Computer Science Applied to Human and Social Sciences, Economics TrackUniversity of Grenoble Alpes2017