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The Plasma Physics Laboratory is seeking a highly skilled C++ and Python Research Engineer with a strong background in high-performance computing to join our team and contribute to the development of the open-source project, PHARE (

PHARE is a cutting-edge simulation code designed for modeling kinetic plasmas in complex multiscale astrophysical and laboratory environments. Utilizing a hybrid formalism, PHARE treat electrons as a fluid, while employing the Particle-In-Cell method to evolve the ion distribution function in a Lagrangian manner. The innovative approach of PHARE enables the system to evolve on an adaptive hierarchy of grids (patch-based AMR), concentrating time and space resolution in critical regions.

Built using a mix of modern, highly-templated C++ (17) and user-friendly Python with the pybind11 library, PHARE is a 100% open-source project hosted on GitHub. The project emphasizes robust unit and functional testing and employs in-house continuous integration.


  • Contribute to the ongoing development of PHARE
  • Optimize various components of the software
  • Enhance parallelization within MPI processes, utilizing both CPU multithreading and GPU acceleration
  • Design and implement comprehensive unit and functional tests
  • Ensure code and performance portability across diverse computing platforms


  • Expertise in C++ (at least 17), with proficiency in template programming
  • Mastery of Python for numerical applications
  • Strong background in software design engineering
  • Familiarity with Git and open-source collaboration workflows
  • Experience in multithreading and GPU computing; familiarity with libraries such as Kokkos, RAJA, SYCL, or compiler directives like OpenMP, OpenACC is a plus
  • Proficiency in performance analysis and profiling tools

You will work at the Laboratory of Plasma Physics, on the campus of Ecole Polytechnique, in Palaiseau, France.