Portfolio
Portrait of Maxime Ronceray

Astrophysics · Scientific machine learning

Maxime Ronceray

I build machine-learning tools to find unusual galaxies and infer their physical properties from large astronomical surveys.

01

Research & experience

Work at the intersection of astronomical surveys, probabilistic inference, representation learning and scientific software.

Mar - Sep 2026Research intern - galaxy population inferenceCEA Paris-Saclay · CosmoStat

Variational inference for data-driven galaxy population priors with differentiable stellar-population synthesis.

  • Develop amortized posteriors for 15 physical galaxy parameters.
  • Combine DSPS, normalizing flows and reweighted wake-sleep training.
  • Study scalable population-level inference for next-generation imaging surveys.
Open related work
2025 - 2026Master research project - foundation modelsIAC Deep · University of Tours · Tenerife / Blois

Benchmarking foundation models for unsupervised discovery in matched Euclid imaging and DESI spectroscopy.

  • Compare AstroPT, AstroCLIP and AION multimodal representations.
  • Build scalable anomaly scores with normalizing flows and cross-modal alignment.
  • Paper accepted at the ICLR 2026 FM4Science workshop.
Open related work
2025 · 3 monthsAI assessment for the DOC-Rivers projectOSUC - Observatory of Universe Sciences

Remote sensing of dissolved organic carbon in Arctic rivers with scalable machine-learning workflows.

  • Evaluated mixture-of-experts approaches for remote-sensing data.
  • Parallelized computation on HPC resources and transferred the workflow to domain scientists.
2024 · 4 monthsScientific software engineering internLPP · CNRS / Ecole Polytechnique · Palaiseau

Developed PLASMAG, a simulation environment for search-coil magnetic sensors used in space instrumentation.

  • Designed a dependency-driven simulation engine and scientific interface.
  • Integrated SPICE simulations and sensor-parameter optimization.
  • Benchmarked the calculation engine and presented the project to researchers.
Open related work
2023 · 3 monthsInstrumentation software internLPC2E · CNRS / ESA / NASA HelioSwarm · Orleans

Built an interface to automate space-instrument testing and measurement acquisition.

  • Controlled oscilloscope hardware through an SDK.
  • Automated measurements, signal processing and analysis.

02

Education

2024 - 2026MSc Data Science and Artificial IntelligenceUniversity of Tours · Blois

Machine learning, deep learning, statistics, probability, data engineering and advanced data structures.

  • Research track focused on scientific machine learning and astronomical applications.
  • Student representative for the University of Tours.
2022 - 2024BSc-level degree in software engineering (BUT)University of Orleans · Institute of Technology

Software development, project management and an artificial-intelligence specialization.

  • Elected student representative to the institute board of directors.
2020 - 2022Computer science and physics studiesPolytechnique Montreal · Montreal

Software engineering, physics, linear algebra, calculus and scientific simulation.

  • Developed Python and MATLAB simulations and a team Qt application.

03

Skills

Scientific ML

  • JAX
  • PyTorch
  • Normalizing flows
  • Multimodal transformers
  • VQ-VAE

Research computing

  • Python
  • NumPy
  • Pandas
  • HPC
  • Scientific visualization
  • LaTeX

Engineering

  • C / C++
  • React
  • SQL
  • Git
  • Data engineering
  • Scientific software

Languages

  • French - native
  • English - fluent

04

Selected work

05

Original PDF

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