Principal HPC Network Engineer

Company Description

Mirantis is the Kubernetes-native AI infrastructure company, enabling organizations to build and operate scalable, secure, and sovereign infrastructure for modern AI, machine learning, and data-intensive applications. By combining open source innovation with deep expertise in Kubernetes orchestration, Mirantis empowers platform engineering teams to deliver composable, production-ready developer platforms across any environment—on-premises, in the cloud, at the edge, or in sovereign data centers. As enterprises navigate the growing complexity of AI-driven workloads, Mirantis delivers the automation, GPU orchestration, and policy-driven control needed to manage infrastructure with confidence and agility. Committed to open standards and freedom from lock-in, Mirantis ensures that customers retain full control of their infrastructure strategy. https://www.mirantis.com/

Job Description

Role Overview:

We are seeking a highly skilled Senior HPC Networking Engineer to design, deploy, manage, and troubleshoot high-performance networking environments. The ideal candidate will have deep expertise in InfiniBand technologies, strong general networking knowledge, and hands-on experience with Fortinet solutions. You will play a critical role in ensuring the performance, reliability, and scalability of HPC infrastructure.

Key Responsibilities:

• Design, deploy, and maintain high-performance network infrastructures for HPC environments, with a strong focus on InfiniBand fabrics.
• Troubleshoot complex network issues across InfiniBand and Ethernet environments, ensuring minimal downtime and optimal performance.
• Manage and optimize InfiniBand components, including switches, HCAs, subnet managers, and fabric configurations.
• Perform performance tuning, monitoring, and capacity planning for HPC networking systems.
• Implement and maintain network security using Fortinet solutions (FortiGate, FortiManager, FortiAnalyzer).
• Diagnose and resolve issues related to routing, switching, latency, and throughput across hybrid network environments.
• Collaborate with compute, storage, and platform teams to support HPC workloads and cluster operations.
• Develop and maintain documentation for network architecture, configurations, and operational procedures.
• Participate in on-call rotations and provide escalation support for critical incidents.
• Lead or contribute to network upgrades, migrations, and new deployments.

Qualifications

Required:

• 5+ years of experience in network engineering, with a focus on HPC or data center environments.
• Strong hands-on experience with InfiniBand technologies (e.g., Mellanox/NVIDIA).
• Solid understanding of networking fundamentals: TCP/IP, routing protocols (BGP, OSPF), VLANs, QoS, and network design.
• Proven experience deploying and troubleshooting Fortinet solutions (FortiGate, FortiManager, VPNs, firewall policies).
• Experience with network performance analysis and troubleshooting tools.
• Familiarity with Linux systems and scripting for automation (e.g., Bash, Python).
• Strong analytical and problem-solving skills.

Preferred:

• Experience with large-scale HPC clusters or AI/ML infrastructure.
• Knowledge of RDMA, MPI, and low-latency networking concepts.
• Certifications such as FCSS/FCNSP (Fortinet), CCNP/CCIE, or equivalent.
• Experience with automation and Infrastructure as Code tools (e.g., Ansible, Terraform).

Soft Skills:

• Strong communication and collaboration skills.
• Ability to work independently and handle complex technical challenges.
• Detail-oriented with a proactive approach to problem-solving.

Additional Information

What does Mirantis offer you?

• Work with an established Silicon Valley leader in the cloud infrastructure industry;
• Work with exceptionally passionate, talented and engaging colleagues, helping Fortune 500 and Global 2000 customers implement next-generation cloud technologies;
• Be a part of cutting-edge, open-source innovation;
• Thrive in the high-energy environment of a young company where openness, collaboration, risk-taking, and continuous growth are valued;
• Professional development and training;
• Attend conferences and working groups;
• Company outings, happy hours, hackathons, and tech talks;
• Receive a competitive compensation package with a strong benefits plan.

We are a Leader for Container Management in G2 (#2 after AWS)!