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HPC Performance Developer Alliance Services Plus - GECI International | Permanent Contract | France & Benelux About Alliance Services Plus A specialist in High Performance Computing (HPC) and Artificial Intelligence for over 15 years, Alliance Services Plus operates on the largest national and industrial HPC infrastructures in France and Europe (CEA, CNRS, TotalEnergies, SAFRAN). The Role You will develop and optimize scientific applications for next-generation HPC architectures. You will work on code porting, performance optimization, and application deployment on cloud and hybrid infrastructures, integrating the latest technologies (GPU, AI). Main Responsibilities Development and optimization of HPC applications (Fortran, C/C++, Python) Application porting to GPU architectures (CUDA, HIP, OpenCL, OpenACC) Code parallelization (MPI, OpenMP, hybrid MPI+X) Performance analysis and profiling (VTune, TAU, Nsight, gprof) Algorithmic optimization and vectorization Application deployment on cloud HPC infrastructures (AWS, Azure, GCP) Containerization and orchestration of scientific applications Integration of AI solutions in HPC workflows Benchmarking and performance evaluation on new architectures Technical documentation and knowledge transfer Required Profile Education: Master's or PhD (Bac+5/PhD) in Computer Science, Scientific Computing, Computational Physics, or equivalent Required Technical Skills: Mastery of HPC development: Fortran, C/C++, Python Expertise in parallel programming (MPI, OpenMP) Experience with modern architectures (multi-core, many-core, GPU) Knowledge of profiling and optimization tools Understanding of hardware architectures (CPU, GPU, memory, network) Assets: Experience in GPU programming (CUDA, HIP, directives) Knowledge of cloud HPC platforms Experience with scientific codes (CFD, MD, quantum chemistry) AI/ML skills applied to HPC Scientific publications or open-source contributions Personal Qualities: Technical curiosity, analytical ability, autonomy, innovative spirit, scientific communication, multidisciplinary teamwork Conditions Permanent contract based in France (Paris region or client sites) or Benelux Salary according to profile and experience R&D projects on cutting-edge technologies (GPU, AI, quantum) Access to Europe's largest supercomputers Participation in international conferences and training Stimulating environment with recognized HPC experts