Performance Modeling Engineer ~2Active$293K–$385K

The opportunity

OpenAI’s Hardware organization develops system and infrastructure solutions designed for the unique demands of advanced AI workloads. We work closely with architecture, infrastructure, and vendor teams to evaluate system performance and guide critical design decisions.

What you'll do

  • Support the development and maintenance of performance modeling tools and frameworks

  • Assist in building models to evaluate system behavior across compute, memory,: networking, and interconnect subsystems

  • Help analyze distributed system scaling behavior and identify performance bottlenecks

  • Run simulations and analytical models to support architecture and infrastructure decisions

  • Partner with senior engineers to evaluate design tradeoffs across hardware and system components

  • Interpret modeling outputs and help translate findings into clear recommendations

What they're looking for

  • Validate models using benchmarking data and real system performance measurements
  • Improve modeling workflows, documentation, and usability for broader team adoption
  • Collaborate cross-functionally with hardware, infrastructure, and architecture teams
  • Continuously build technical depth across AI infrastructure, system architecture, and performance analysis