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Meta Logo Meta · IT - Software Development

Ai/hpc System Performance Engineer, Phd

United States, Menlo Park 122000.00 - 181000.00 USD / Year · Job Posted February 19, 2026
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Job Description

Meta's AI Training and Inference Infrastructure is growing exponentially to support ever increasing uses cases of AI. This results in a dramatic scaling challenge that our engineers have to deal with on a daily basis. We need to build and evolve our network infrastructure that connects myriads of training accelerators like GPUs together. In addition, we need to ensure that the network is running smoothly and meets stringent performance and availability requirements of RDMA workloads that expects a loss-less fabric interconnect. To improve performance of these systems we constantly look for opportunities across stack: network fabric and host networking, comms lib and scheduling infrastructure.

Job Responsibility

  • Active member of a multi-disciplinary team to develop solutions for large scale training systems
  • Responsible for the overall performance of the communication system, including performance benchmarking, monitoring and troubleshooting production issues
  • Identify potential performance issues across the stack: comms lib, RDMA transport, host networking, scheduling and network fabric. Develop and deploy innovative solutions to address the performance issues

Requirements

  • Currently has, or is in the process of obtaining a Bachelor's degree in Computer Science, Computer Engineering, relevant technical field, or equivalent practical experience. Degree must be completed prior to joining Meta
  • Bachelor's degree in Computer Science, Computer Engineering, relevant technical field, or equivalent practical experience
  • BS/MS/PhD in relevant fields (EE, CS), with 2+ years work experience
  • Experience with using communication libraries, such as MPI, NCCL, and UCX
  • Experience with developing, evaluating and debugging host networking protocols such as RDMA
  • Experience with triaging performance issues in complex scale-out distributed applications
  • Must obtain work authorization in country of employment at the time of hire and maintain ongoing work authorization during employment

Nice to have

  • Understanding of AI training workloads and demands they exert on networks
  • Understanding of RDMA congestion control mechanisms on IB and RoCE Networks
  • Understanding of the latest artificial intelligence (AI) technologies
  • Experience with machine learning frameworks such as PyTorch and TensorFlow
  • Experience in developing systems software in languages like C++

What we offer

  • bonus
  • equity
  • benefits
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