Principal HPC Network Engineer (remote in the US)

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/

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.

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.

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.

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