Site Reliability Engineer

Date: Oct 26, 2026 Ref. No: 552344 Location: Madrid, ES 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 a Site Reliability Engineer (SRE) to join Bull’s innovative R&D team and contribute to the reliability, performance, security and scalability of our cloud and High Performance Computing (HPC) platforms. You will work on infrastructure monitoring and reliability, cybersecurity, automation and the end-to-end management of the software supply chain. The role combines platform engineering, cloud infrastructure, Kubernetes, DevOps and SRE practices, with a strong focus on automation and continuous improvement. You will join our international R&D team to help design, build, operate and evolve next generation cloud and HPC platforms. Key Responsibilities - Design, operate and maintain Kubernetes-based platforms, including GKE environments, ensuring reliability, scalability, security and performance. - Manage cloud and infrastructure services across GCP, Kubernetes and on-premises environments. - Implement and maintain GitOps, CI/CD and automation solutions using Argo CD, Helm, GitHub Actions and Ansible. - Administer platform services including Artifactory, SonarQube, Jenkins, Keycloak, Backstage and Dependency-Track. - Manage networking, traffic routing, DNS, certificates, secrets and platform security controls. - Design and operate observability, monitoring and incident management solutions for production environments. - Configure, optimize and maintain PostgreSQL, Cloud SQL and other platform data services. - Plan and execute platform upgrades, migrations and continuous infrastructure improvements. - Manage and enhance the software supply chain, including artifact management, dependency management and security scanning. - Provide technical guidance to development teams and contribute to documentation, platform adoption and best practices. - Participate in Agile/Scrum ceremonies and collaborate with cross-functional teams on platform evolution. Required Skills & Experience - Bachelor’s degree in Computer Science, Software Engineering or a related technical field. - 2+ years of experience building and operating cloud-native platforms, preferably in Kubernetes-based environments. - Hands-on experience with Kubernetes administration and production workloads. - Experience with GCP and cloud infrastructure services. - Experience with GitOps, Argo CD, Helm and CI/CD pipelines. - Knowledge of Infrastructure as Code and automation using Ansible and Git. - Experience with monitoring and observability solutions such as Prometheus and Grafana. - Good understanding of networking concepts, Linux systems and platform security. - Experience with PostgreSQL and/or Cloud SQL environments. - Scripting skills in Python and/or Bash. - English B2+ minimum. C-level proficiency is desirable. - Kubernetes certification is considered an advantage. Nice to Have - Experience with GKE, Envoy Gateway and Kubernetes Gateway API. - Experience supporting HPC environments. - Familiarity with software supply chain security practices. - Experience with Backstage, Artifactory, SonarQube, Jenkins, Keycloak or Dependency-Track. - Strong Linux administration and troubleshooting skills. Location: Madrid or Barcelona; remote within Spain for other locations Benefits - Flexible Work Schedule: Enjoy half-day Fridays and an intensive summer workday to help maintain a great work-life balance. - Learning & Growth: Stay at the forefront of AI and technologies, with opportunities to learn and grow in a supportive, innovative environment. #Bull 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.