LLM assistant
Nathan Cassereau
Nathan Cassereau
Senior HPC AI Engineer
Paris, France

Skills & Expertise

Languages
French Native
English Professional
GPU & Kernel Optimization
CUDATritonPallasGPU Profiling (Nsight, Torch)
Multi-GPU Distribution
MPIOpenMPPyTorch DDP/FSDPDeepSpeedMegatron-LM
ML Frameworks & Tools
PyTorchJAXvLLMW&BMLflowHuggingFace (Transformers, Datasets, Accelerate)LangChain
Deep Learning
NLP & LLMComputer VisionDiffusion ModelsMulti-modal AIPost-training
HPC Infrastructure
SlurmSpackDockerModulesCondaAnsibleProxmox
Programming & Tools
PythonC++RustJupyterGitCI/CDLaTeX

Summary

I'm a Senior HPC AI Engineer with expertise spanning GPU kernel optimization (CUDA, Triton: achieving 7× speedup, 5× less memory), distributed training at scale, and ML research collaboration. I develop high-performance solutions across the full stack, from low-level kernel optimization to infrastructure deployment and research support. My experience on supercomputers like Jean Zay and GB200 NVL72 covers performance optimization, infrastructure automation, and hands-on collaboration on cutting-edge AI research projects across multiple scientific domains (NLP, computer vision, astrophysics, climate modeling). I also provide training and consultancy to research institutions on AI optimization and deep learning techniques.

Work Experience

Senior HPC AI Engineer

AMIAD
October 2025 - Ongoing

ML Engineer (Freelance)

Entalpic
June 2025 - September 2025

Artificial Intelligence Engineer

IDRIS (CNRS)
May 2021 - May 2025

Internships

Teachings

During my experience at IDRIS, one of my task was to provide teaching courses to universities, other institutes, and even private companies. Here is an overview of teachings I did during my time at IDRIS.

  • Specialization of Large Language Models: Prompt Engineering & Fine-tuning (Manager of this course)
  • Optimization of Deep Learning for Supercomputers
  • Other IDRIS formal courses
  • Miscellaneous
NVIDIA
RTE
Thales
IDEMIA
Guerbet
CEA
Ministères des finances / de la justice / de la transition écologique / de l'intérieur
EDF
MétéoFrance
France Travail
CNRS
CentraleSupélec
Collège de France
ENS Paris Saclay
ENGIE
INRIA
INSERM
ONERA
Institut Pasteur
École Polytechnique
Sorbonne Université
Synchrotron Soleil

and many other...

Education

MSc. Artificial Intelligence & Deep Learning with Honours

2019 - 2020
Imperial College London, London (United Kingdom)

Master in Engineering

2017 - 2020
CentraleSupélec, Gif-sur-Yvette (France)

Two-year undergraduate intensive course in maths & physics to prepare for nationwide competitive examination

2015 - 2017
Lycée Michelet, Vanves (France)

High-School Diploma in Science with Highest Honours

2015
Lycée Jacques Monod, Clamart (France)