HPC Network Engineer at Mirantis in Tokyo, Tokyo, Japan

companyDescription
About Mirantis
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.
jobDescription
We are looking for an HPC Network Engineer to join our global team responsible for managing and supporting high-performance networking environments for large-scale AI infrastructure. You will help ensure the performance, reliability, and security of critical network fabrics, working closely with distributed compute and storage teams to support modern AI workloads.
This is an opportunity to work hands-on with some of the most advanced InfiniBand and Ethernet networking infrastructure in production today, while developing deep expertise in AI infrastructure and high-performance computing (HPC) technologies.
Responsibilities:
Support the design, deployment, configuration, and maintenance of InfiniBand and Ethernet network infrastructures.
Troubleshoot complex network issues, including connectivity, latency, routing, and performance degradation across hybrid environments.
Manage and optimize high-performance network components, such as switches, Host Channel Adapters (HCAs), subnet managers, and fabric configurations.
Implement, manage, and troubleshoot network security and firewall technologies (e.g., Fortinet solutions like FortiGate, VPNs).
Monitor network health, perform performance tuning, and assist in capacity planning for HPC and AI networking systems.
Collaborate with compute, storage, and platform teams to seamlessly support HPC and AI workloads.
Participate in incident response, on-call support activities, and drive long-term operational improvements.
Document network architectures, configurations, and operational procedures, and adopt automation tools (e.g., Ansible, Terraform) to streamline workflows.
qualifications
Proven experience in networking, system engineering, or data center infrastructure roles.
Solid understanding of networking fundamentals, including TCP/IP, routing protocols (BGP, OSPF), switching, VLANs, QoS, and network design.
Hands-on experience or strong familiarity with Linux operating systems and command-line tools.
Effective verbal and written communication skills in English, with the ability to collaborate in a global team environment.
Strong analytical and problem-solving skills to diagnose and resolve complex network challenges.
Nice to have:
Exposure to or hands-on experience with InfiniBand fabrics and high-performance networking concepts (e.g., NVIDIA/Mellanox).
Familiarity with or certifications in enterprise firewall technologies (e.g., Fortinet FCSS/FCNSP, CCNP/CCIE).
Experience with large-scale HPC clusters, AI/ML infrastructure, or distributed systems environments.
Knowledge of RDMA, MPI, and low-latency networking concepts.
Proficiency in scripting languages (e.g., Python, Bash) and Infrastructure-as-Code (IaC) tools for automation.
additionalInformation
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.

It is understood that Mirantis, Inc. may use automated decision-making technology (ADMT) for specific employment-related decisions. Opting out of ADMT use is requested for decisions about evaluation and review connected with the specific employment decision for the position applied for. You also have the right to appeal any decisions made by ADMT by sending your request to isamoylova@mirantis.com

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