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Mirantis is seeking a Senior Solutions Architect with deep networking expertise to join the Voyager team in the Office of the CTO. You will own the network solutioning of k0rdent AI, the company's platform for building and operating GPU clouds and AI factories, from metal to model.
You will design how large GPU clusters are interconnected, how tenants are isolated, and how workloads reach the network from containers, virtual machines, and bare metal nodes. You will turn designs into published reference architectures, working code, and proofs of concept that run on real hardware with customers and partners.
As part of the Office of the CTO, research is a core part of the role. You will explore designs and technologies before customers ask for them, prototype ideas that may not ship, and challenge established practice when a better approach exists. Your work will shape where k0rdent AI goes next.
Key responsibilities include:
**Reference Architecture**: Design and publish network reference architectures for k0rdent AI covering data center topologies from single racks to multi-thousand-GPU clusters. Define compute fabrics on InfiniBand and RoCEv2 Ethernet, including rail-optimized and fat-tree/Clos designs. Define front-end, storage, and management networks. Specify multi-tenant isolation across the stack and document scale limits and trade-offs.
**Host and Platform Networking**: Define how Linux hosts expose NICs, DPUs, and SuperNICs to workloads. Design Kubernetes networking for AI workloads including primary and secondary CNIs, Multus, SR-IOV, and RDMA device plugins. Design networking for virtual machines on KubeVirt.
**Research and Exploration**: Track and evaluate emerging technologies in AI networking such as Ultra Ethernet, SuperNIC, and DPU offloads. Prototype alternative designs in the lab and measure against current practice. Challenge established designs when evidence points to better options. Publish findings as research notes, design proposals, and external papers or talks.
**Code and Proofs of Concept**: Build and run proofs of concept with customers and partners. Write automation and tooling (Python, Go, Bash, Ansible, Helm, Kubernetes manifests, Terraform) that makes reference architectures reproducible. Run validation and benchmarking of fabrics and host configurations.
**Customers, Partners, and Community**: Act as network subject matter expert in customer discovery and design reviews. Work with hardware and networking partners on joint designs. Present at industry events and run hands-on workshops. Write technical content including reference architecture documents and solution briefs.
You will split time between exploring new designs, writing architecture, building and validating in the lab, and explaining to engineers, executives, and conference audiences. You will work with Solutions Architects, Partner Management, and Engineering colleagues across many countries and time zones.
The role is remote, open to candidates based in Europe. Travel up to 25% for customer engagements, partner meetings, lab work, and industry events, primarily within the EU and US.
**Requirements**
Education and Experience:
- Bachelor's degree in Computer Science, Electrical Engineering, Telecommunications, or related field, or equivalent practical experience
- 8+ years in network engineering or network architecture, with at least 3 years in data center, HPC, or cloud infrastructure networking
- Customer-facing experience as a solutions architect, pre-sales engineer, consultant, or technical lead
Required Technical Skills:
- Data center network design: spine-leaf and Clos topologies, rail-optimized GPU fabrics, oversubscription, ECMP, and operational challenges of scaling to thousands of nodes
- InfiniBand: subnet management, partitioning, adaptive routing, and NCCL/RDMA traffic behavior
- RoCEv2 on Ethernet: lossless and congestion-controlled designs (PFC, ECN, DCQCN), QoS, MTU, and buffer tuning
- Routing and overlays: BGP, EVPN-VXLAN, VRFs for multi-tenancy
- Hybrid and multi-cloud connectivity: interconnects, VPN, cloud provider networking, IP address and DNS planning
- Linux networking: kernel and driver management of NICs, PCI passthrough, SR-IOV, IOMMU, NUMA affinity, and tools (iproute2, ethtool, devlink)
- Kubernetes networking: CNI plugins (Cilium, Calico, OVN-Kubernetes), Multus, secondary networks, SR-IOV and RDMA device plugins, network policy
- Virtualization on Kubernetes: KubeVirt and VM networking configuration
- Programming or scripting in at least one language (Python or Go preferred), comfortable with Git, CI, and infrastructure-as-code
How You Work:
- Curious: dig into why fabrics behave as they do, read specs and source, keep up with AI networking changes, question established designs
- Ownership: take reference architectures or POCs from sketch to published, validated result
- Proactive: spot gaps in product, documentation, or customer design before asked
- Fast learner: get productive quickly in unfamiliar hardware, software, or customer environments
- Business acumen: connect network design choices to cost, time-to-value, and risk
Communication and Collaboration:
- Excellent written and spoken English; write documents others can build from
- Comfortable presenting to large audiences at conferences and running hands-on workshops
- Adapt messaging to audience from network engineers to customer executives
- Experience working in international, distributed companies across time zones
