About Bull Bull is a story. One with a century of European innovation and a working environment where experts design powerful, sustainable, and sovereign digital solutions, enabling states and industries to retain full control over their data and their AI. Bull is also thousands of engineers, researchers and passionate tech people shaping the future of high‑performance computing, AI, and quantum technologies. Every day, our teams push the boundaries of what is technologically possible - from next‑generation HPC architectures to exascale supercomputers - supported by world‑class R&D, more than 1,600 patents, and unique end‑to‑end capabilities spanning hardware design, software engineering, data science and quantum research. We are a people‑centric, innovation‑driven company, where collaboration spans Europe, the Americas and India. We share a common vision of a responsible and sustainable innovation that delivers concrete impact for our customers.

We are looking for an experienced HPC Administrator to support the design, build, and operation of Linux‑based high‑performance computing clusters (CPU and GPU). You will manage system administration tasks, ensure cluster stability, maintain software stacks, and support parallel computing environments used in scientific and engineering workloads.

Key Responsibilities:

• Design and build Linux-based HPC CPU/GPU clusters.
• Perform system administration, software maintenance, system monitoring, and troubleshooting for HPC/GPU clusters.
• Manage and operate HPC facilities and infrastructure.
• Administer Red Hat Enterprise Linux 8, 9, 10 or similar operating systems.
• Configure and support parallel computing environments: CUDA, OpenMP, MPI
• Deploy and manage Infiniband (ultra low‑latency networks) and Ethernet high‑performance networks.
• Administer batch scheduling systems such as: Slurm, PBS
• Manage compute resources (CPU, GPU, RAM) for serial and parallel workloads.
• Compile, install, update, and tune scientific software and libraries (commercial and open‑source) on compute nodes and HPC file systems.
• Maintain and update firmware and drivers related to HPC systems.

Requirements:

• Experience designing and managing HPC Linux clusters (CPU/GPU).
• Strong background in Linux system administration (preferably RHEL‑based).
• Knowledge of parallel programming environments (CUDA, OpenMP, MPI).
• Experience administering Slurm, PBS, and managing HPC compute resources.
• Hands‑on experience with Infiniband and high‑performance networking.
• Proficiency with compiling and maintaining scientific software stacks.
• Strong troubleshooting skills in complex HPC environments.

Nice to Have

• Familiarity with HPC storage systems.
• Scripting knowledge (Bash, Python).
• Experience in performance tuning of HPC environments.

Location: Madrid

Join us!

Here, your ideas, your curiosity and your technical excellence directly shape the next era of advanced computing - unlocking enterprise value, accelerating scientific progress and driving positive impact for society.