Senior HPC Networking 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 Location: US Employment Type: Full-time

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.

• You will actively troubleshoot and resolve daily customer incident tickets to keep massive GPU training runs moving.

Build, operate, and scale next-generation GPU infrastructure:

• You will be hands-on on the front lines driving daily triage, incident resolution, and SLA management for the world’s most advanced NVIDIA clusters, InfiniBand/RoCE fabrics, and AI workloads. Build the playbook, then grow into the platform:

• Designed for engineers energized by standing up new operations from the ground up, this role offers a direct trajectory from operationalizing bare-metal clusters to driving platform and AI capabilities as we scale.

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.

What We Offer:

• Opportunity to work on cutting-edge HPC infrastructure.

• Collaborative and innovative work environment.

• Competitive salary and benefits package.

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)!