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Nassim User

@nassimuser

I build rigorous, reproducible machine learning systems for vision, generative modeling, and LLMs.

France
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What I'm looking for

I'm looking to build rigorous, reproducible ML systems where mathematical foundations, experimentation, and measurable impact matter, particularly across deep learning, computer vision, generative modeling, and LLMs.

At BioMaps, CEA, and Université Paris-Saclay, I'm developing a memory-optimized 3D CycleGAN for thoracic CT-to-UTE-MRI translation and a reproducible medical-imaging pipeline using MONAI, PyTorch, TensorBoard, and MLFlow. My Hist-CycleGAN loss improved MRI realism from FID 225.96 to 217.89 and KID 0.1158 to 0.0969 while preserving anatomical consistency.

I've also improved constrained neural networks for phylogenetics at the Collège de France, reducing constraint violations from 15% to under 1%, and built projects in neural-network verification, speech classification, and YOLOv1 benchmarking. I bring strong mathematical foundations to deep learning, computer vision, generative modeling, and LLM work, with an emphasis on rigor, reproducibility, and measurable impact.

Experience

Work history, roles, and key accomplishments

BP
Current

Research Intern: 3D Medical Image Translation

BioMaps, CEA & Université Paris-Saclay

Apr 2025 - Present (1 year 4 months)

Developed a 3D CycleGAN for thoracic CT to UTE-MRI translation using MONAI/PyTorch, optimizing memory for 24GB GPUs. Built a reproducible preprocessing pipeline with experiment tracking and benchmarked adversarial objectives, designing a differentiable histogram-matching loss that improved MRI realism.

Education

Degrees, certifications, and relevant coursework

École Normale Supérieure Paris-Saclay logoCP

École Normale Supérieure Paris-Saclay

Master of Science, Mathematics, Vision, Learning

2024 - 2025

Grade: 17/20

Master 2 in Mathematics, Vision, Learning (MVA) with a focus on deep learning, generative models, and computer vision. Achieved a GPA of 17/20.

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