Performance Modeling Engineer

Skills

About the Role

You will develop and apply performance modeling tools that evaluate AI system behavior and inform architectural decisions. You'll work closely with the Performance Modeling Lead and partner teams to run simulations and analytical models, quantify tradeoffs across compute, memory, networking and storage, and validate your models against real system measurements. The role is based in San Francisco with a hybrid schedule of 3 days in the office per week.

Requirements

• Strong software engineering or modeling background (simulation, systems modeling, or performance analysis)
• Familiarity with system architecture fundamentals (compute, memory, networking)
• Experience with programming and building technical tools or frameworks
• Ability to reason about performance bottlenecks and scaling behavior
• Strong analytical skills and comfort with quantitative models
• Ability to collaborate across teams and learn new system domains quickly

Responsibilities

• Develop and maintain performance modeling tools and frameworks
• Build models to evaluate system behavior across compute, memory, and interconnect subsystems
• Model distributed system scaling and bottlenecks
• Run simulations and analytical models to support architectural tradeoff analysis
• Collaborate with the performance modeling lead and system architects to answer forward-looking design questions
• Analyze and interpret modeling outputs into actionable insights
• Validate models against real system measurements and workload behavior
• Improve modeling fidelity, usability, and scalability

Benefits

• Equity
• Medical, dental, and vision insurance with employer HSA contributions
• Pre-tax Health FSA, Dependent Care FSA, and commuter accounts
• 401(k) with employer match
• Paid parental leave (up to 24 weeks for birth parents and 20 weeks for non-birthing parents)
• Paid medical and caregiver leave (up to 8 weeks)
• Flexible PTO for exempt employees; up to 15 days for non-exempt employees
• 13+ paid company holidays and coordinated office closures
• Paid sick or safe time
• Mental health and wellness support
• Employer-paid basic life and disability coverage
• Annual learning and development stipend
• Daily meals in offices and meal delivery credits
• Relocation support
• Charitable donation matching and wellness stipends
• Performance-related bonus