AI Cluster Architect

About this role

Designs large-scale GPU clusters within fixed power, thermal, and facility constraints. The role balances GPU density, networking, storage, and service requirements while ensuring cluster performance and scalability.

About the company

Vultr provides cloud compute, storage, and GPU infrastructure across global data centers. It serves developers and businesses deploying applications on flexible cloud resources.

Stack

What you'll do

• Architect GPU clusters to maximize GPU density within site power budgets.
• Model power and thermal use across compute, networking, storage, and facility components.
• Evaluate fabric architectures, topologies, switch scale limits, and network blocking tradeoffs.
• Create reusable power-aware cluster templates and capacity-planning models.
• Document architecture and lifecycle considerations, and collaborate with vendors on large-scale fabric designs.

What we're looking for

• 7+ years designing or building large-scale HPC, AI, or hyperscale GPU clusters.
• Expertise in GPU system design, node topology, and NIC-to-GPU affinity.
• Strong familiarity with InfiniBand, RoCE, Spectrum-X, and multi-tier network topologies.
• Experience modeling power and thermal characteristics across cluster hardware.
• Ability to design and assess non-blocking or oversubscribed networks.
• Experience analyzing vendor SKU specifications and balancing customer requirements for compute, storage, and service density.
• Strong documentation, communication, and cross-functional collaboration skills.

Benefits

• Company-paid medical, dental, and vision insurance premiums.
• 401(k) match of 100% up to 4%, with immediate vesting.
• $2,500 annual professional development reimbursement.
• 11 holidays, PTO accrual and rollover, anniversary PTO increases, and a paid sabbatical every five years.
• Remote office stipend and internet reimbursement.
• Gym membership reimbursement and company-paid Wellable subscription.