Founding GPU Cluster Architect — Hands-On, SF

Hamilton Barnes ?; San Francisco (CA); On-site; USD 190,000 - 260,000; Full time

Job summary

Stealth Neocloud in San Francisco is seeking a Senior Network Solutions Architect to own the design, deployment, and performance of its GPU compute clusters end to end. You will be hands-on, building the fabric from the rack up and serving as the technical authority, with direct access to founders and no bureaucracy.

This founding-level role requires onsite work and relocation if needed, with opportunities as the team expands.

Qualifications

• Hands-on experience standing up GPU clusters at production scale, with clusters you built.
• Real InfiniBand or RoCEv2 design and implementation experience.
• Comfortable across CUDA and ROCm ecosystems, or able to ramp on a new GPU stack quickly.
• Direct customer-facing technical experience, the go-to person when something goes wrong.
• Founding-level ownership and visibility; onsite in San Francisco.

Responsibilities

• Design compute, storage, and networking topology for new cluster deployments.
• Specify node configurations, redundancy, and scaling plans.
• Make real-time build decisions on-site during deployment, not just on paper.
• Bridge datacenter specifications to cluster deployment, including power whips and rack fit‑out.
• Design and personally implement GPU interconnect fabric using InfiniBand and/or RoCEv2.
• Plan and validate bandwidth, topology, and east‑west throughput at scale.
• Diagnose and fix network bottlenecks under load, hands‑on rather than in theory.
• Get workloads running well across both CUDA and ROCm stacks.
• Own driver and firmware compatibility, NCCL/RCCL tuning, and performance benchmarking.
• Troubleshoot low‑level issues directly across drivers, firmware, and fabric managers.
• Lead technical onboarding and workload validation for new customers.
• Act as the direct escalation point when a customer's cluster underperforms, diagnosing it yourself.
• Translate customer workload requirements into concrete infrastructure and configuration decisions.
• Document runbooks and SOPs that reflect how the infrastructure actually gets built and fixed.

Skills

Hands-on GPU clusters

InfiniBand RoCEv2

CUDA ROCm ecosystems

Customer-facing engineering

Hands-on leadership

San Francisco onsite

Founding ownership

Tools

InfiniBand hardware

RoCEv2

CUDA

ROCm

Job description

Stealth Neocloud in San Francisco is seeking a Senior Network Solutions Architect to own the design, deployment, and performance of its GPU compute clusters end to end. You will be hands-on, building the fabric from the rack up and serving as the technical authority, with direct access to founders and no bureaucracy.

This founding-level role requires onsite work and relocation if needed, with opportunities as the team expands.