---
title: "Permanent Contract… – Boutigny-sur-Essonne, France"
canonical: "https://www.metaintro.com/job/permanent-contract-modeling-and-software-development-engineer-in-fuel-65323185-00dc-570b-8f9e-070ba0762ba5"
language: "en"
author: "Metaintro"
---

[/company/adsn-career](/company/adsn-career)[ADSN Career](/company/adsn-career)
# Permanent Contract – Modeling and Software Development Engineer in Fuel Cycle/Neutronics Physics (M/F) at ADSN Career

LanguageEnglish
Français

**Location**
: Boutigny-sur-Essonne, Île-de-France

**Type**
: Full-time

**Level**
: mid

**Added to Metaintro**
: Jul 23, 2026

## Description

CEA is hiring a permanent Modeling and Software Development Engineer in Fuel Cycle/Neutronics Physics to join the APOLLO3® code development team at SERMA/LLPR in Saclay. The role involves developing, verifying, and industrializing deterministic neutron-transport software for nuclear reactor cores, improving calculation schemes and user interfaces, and collaborating with code users and scientific partners. The position requires a Bac+5 degree in scientific computing or reactor physics, 3 to 5 years of software development experience, strong C++, Python, Linux, OpenMP, and MPI skills, and knowledge of reactor physics.

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