Senior AI System Performance Architect

Oxmiq Labs; Campbell (CA); On-site; USD 180,000 - 240,000; Full time

Job summary

OXMIQ is seeking a Principal Performance Modeling Architect in Campbell, CA to own and advance OxSol, the system-solution performance modeling platform, extending its reach to training workloads and multimodal models. You’ll work hands-on to define direction, push for extensibility, and anchor architecture choices with simulation-backed data.

You will read simulation outputs, ensure code quality, and collaborate with engineering leadership to drive high-leverage decisions before capital

Qualifications

• 5–8 years of experience in performance modeling, computer architecture, or systems performance engineering with a shipped body of work.
• Hands-on experience building first-principles/performance models for AI or HPC systems.
• Solid understanding of both inference and training workloads and how they stress compute, memory, and interconnect.
• Proficiency in Python for production-quality codebase development with tests and maintainable abstractions.
• Track record of influencing architecture decisions and a tinkering mindset.

Responsibilities

• Own and extend the system-solution performance modeling platform end to end (Speed-of-Light) across heterogeneous hardware and cluster topologies.
• Extend modeling to training workloads and multimodal architectures.
• Influence silicon and system architecture decisions with defensible, simulation-backed numbers.
• Make the platform extensible and agent-driven; expose analysis capabilities via interfaces.
• Validate simulation results against observed workloads and maintain model fidelity.
• Set the platform's technical direction in line with executive vision and provide engineering guidance.

Skills

Python

Performance modeling

Computer architecture

AI accelerators

Data sheet analysis

Strong communication

Code quality

AI-assisted development

Education

BS/MS/PhD in CS/CE/EE

Tools

vLLM

TensorRT-LLM

Megatron

SGLang

PyTorch

Job description

OXMIQ is seeking a Principal Performance Modeling Architect in Campbell, CA to own and advance OxSol, the system-solution performance modeling platform, extending its reach to training workloads and multimodal models. You’ll work hands-on to define direction, push for extensibility, and anchor architecture choices with simulation-backed data.

You will read simulation outputs, ensure code quality, and collaborate with engineering leadership to drive high-leverage decisions before capital