Detector Simulation Physicist (EP-SFT-2026-152-GRAP)

CERN; Genf; Vor Ort; CHF 95.000 - 150.000; Vollzeit

Zusammenfassung

CERN seeks a developer to advance GPU-accelerated Monte Carlo detector simulation software within the Geant4 team, focusing on optical photon transport. You will design and implement GPU algorithms, validate physics against CPU baselines, and optimize performance in experimental software frameworks.

Engagement involves collaboration with LHC experiments' software teams, contributing to documentation and long-term software quality, with an emphasis on international collaboration and continued

Qualifikationen

• Master's degree with 2 to 6 years of post-graduation professional experience or PhD with no more than 3 years of post-graduation experience.
• Experience in physics/simulation software development preferred.
• Experience with GPU programming and heterogeneous computing.

Aufgaben

• Design, develop and integrate GPU algorithms for optical photon simulation in Monte Carlo transport framework.
• Compare and validate GPU results against CPU implementations.
• Develop unit, regression and physics-validation tests.
• Profile applications, identify bottlenecks and optimise performance.
• Collaborate with international Geant4 and LHC software teams to integrate GPU-enabled transport into simulation frameworks.
• Contribute to documentation, maintenance and long-term software quality.

Kenntnisse

modern C++

CUDA

Python

GPU programming

performance optimisation

Git

unit testing

Ausbildung

Master's degree

PhD

Tools

Geant4

gdb

Compute Sanitiser

Nsight Systems

Nsight Compute

Jobbeschreibung

Job Description

In this role, you will develop and improve GPU-accelerated Monte Carlo detector simulation software within the Geant4 team, with a particular focus on optical photon transport. You will contribute to software design and implementation, physics validation against established CPU simulations, performance optimisation, and integration into experimental software frameworks.

Your responsibilities

• Design, develop, and integrate GPU algorithms for optical photon simulation within a Monte Carlo particle-transport framework.
• Compare and validate GPU simulation results against established CPU implementations.
• Develop unit, regression, and physics-validation tests.
• Profile applications, identify performance bottlenecks, and optimise computational performance.
• Collaborate with software teams from the Large Hadron Collider experiments to integrate GPU-enabled particle transport into their simulation frameworks.
• Engage with the international Geant4 collaboration and its user community, particularly in the area of optical photon simulation.
• Contribute to the documentation, maintenance, and long-term quality of the developed software.

Your profile

• Experience in developing scientific or physics-simulation software, preferably using modern C++.
• Experience with GPU programming or software development for heterogeneous computing architectures.
• Experience with software testing, numerical validation, performance profiling, or optimisation.
• Knowledge of Monte Carlo methods or experience with particle-transport simulation would be an advantage, particularly in the area of optical photon transport.
• Experience contributing to collaborative software projects or working within an international scientific environment would be an advantage.

Skills

• Programming languages and technologies: modern C++, CUDA, Python.
• GPU programming, heterogeneous computing, and performance optimisation.
• Git and collaborative software development.
• Unit testing, regression testing, and numerical validation.
• Experience with Monte Carlo particle-transport codes such as Geant4 would be considered an advantage.
• Debugging and profiling tools such as gdb, Compute Sanitiser, perf, Nsight Systems, or Nsight Compute would be considered an advantage.
• Spoken and written English, with a commitment to learn French.

Eligibility criteria

• You are a national of a CERN Member or Associate Member State.
• You have a professional background in Physics, Computer Science, or a related (or a related field) and have either:
  • Master's degree with 2 to 6 years of post-graduation professional experience;
  • or a PhD with no more than 3 years of post-graduation professional experience.
• You have never had a CERN fellow or graduate contract before.