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.

Be sure to meet the eligibility criteria

• You are a national of a CERN Member State or Associate Member State. Currently, we cannot consider applications from Pakistani, Lithuanian, Latvian, Cypriot, Croatian and Turkish nationals, as the ceiling defined under Article II.5 of the Associate Membership Agreement has been reached.
• By the application deadline, you have a master’s degree with 2 to 6 years of professional experience since graduation or a PhD with a maximum of 3 years of professional experience since graduation. You are not eligible with only a bachelor’s degree.
• You have never had a CERN fellow or graduate contract before.
• Please pay attention to the additional criteria and requirements for this specific position and mentioned above.