Julien Lefaucheur
Software Engineer In Machine Learning at European Centre for Medium-Range Weather Forecasts
Reading, England, United Kingdom
Summary
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Senior🎓
Top SchoolJulien Lefaucheur is a software engineer specializing in machine learning with a decade of experience bridging academic research and operational deployment in meteorology and defense. After a PhD and postdoctoral work in high-energy astrophysics, he transitioned to roles strengthening MLOps and data engineering at the French Ministry of Armed Forces and Meteo France International, where he delivered ML-driven data processing solutions for national weather services. Currently at ECMWF he builds and deploys ML workflows on EuroHPC systems, combining production-grade software practices with scientific rigor. An active contributor to open-source scientific Python (notably enhancements to the gammapy gamma-ray astronomy toolkit), he brings both domain knowledge in atmospheric and astrophysical data and practical experience turning prototypes into operational systems.
10 years of coding experience
9 years of employment as a software developer
Master Noyaux Particules Astroparticules et Cosmologie, Astronomy and Astrophysics, Master Noyaux Particules Astroparticules et Cosmologie, Astronomy and Astrophysics at Université Pierre et Marie Curie
Github Skills (9)
astropy10
python10
astronomy10
numpy10
data-analysis10
matplotlib9
data-visualisation9
data-visualization9
data-visualizations9
Programming languages (5)
Github contributions (5)
gammapy/gammapy
May 2016 - Nov 2017
A Python package for gamma-ray astronomy
Role in this project:
Data Scientist
Data ScientistContributions:85 commits, 30 PRs, 9 pushes in 1 year 6 months
Contributions summary:Julien primarily contributed to the development of the `gammapy/gammapy` repository by implementing and enhancing the `ObservationTableSummary` class. Their work included adding methods to generate zenith and offset distribution plots, and integrating the class into the broader `gammapy.data` module. They also performed code improvements and provided additional functionalities, like summary reports and tests related to the class functionalities and testing features.
gamma-rayraypythonnumpyastrophysics
gammapy/icrc2017-gammapy-cta-egal
Jul 2017 - Jul 2017
Contributions:29 commits, 4 PRs, 22 pushes in 9 days
ctadedicatedscienceextragalactic
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