Cornelis Networks, Inc.

Cornelis Networks, Inc.

Senior Ethernet Performance Engineer

San Francisco, California, United States · Senior · Full-time

Sponsorship not specifiedDetected 14 hours ago
PythonTCP/IPCommunicationCollaborationProblem Solving

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About the role

  • Our differentiated architecture seamlessly integrate s hardware, software and system level technologies to maximize t he efficiency of GPU, CPU and accelerator-based compute clusters at any scale.
  • As a global organization, our team spans multiple U.S. states and six countries, and we continue to expand with exceptional talent in onsite, hybrid, and fully remote roles.
  • Analyze performance metrics such as throughput, latency, congestion, power efficiency, and architectural behavior under networking workloads.

Responsibilities

  • Building, configuring, and benchmarking Ethernet fabrics with RoCEv2 (RDMA over Converged Ethernet) to perform head-to-head performance evaluations against other network architectures (InfiniBand, Omni-Path, and rival Ethernet solutions).
  • Develop and execute validation and performance test plans targeting both internal lab and real-world data center deployment scenarios.
  • Create diagnostic tools and scripts to collect, analyze, and visualize performance data.
  • Collaborate with architecture, firmware, and software teams to root-cause performance anomalies and recommend hardware or system-level improvements.
  • Translate validation and debug findings into actionable feedback for silicon and systems design.

Requirements

  • 7+ years of experience in post-silicon validation, performance engineering, or silicon debug for networking or high-performance compute products.
  • Strong understanding of networking protocols and technologies (e.g., Ethernet, PCIe, switching, congestion control), PFC, ECN, DCQCN.
  • Familiarity with data center performance requirements and benchmarks.

Nice to have

  • Deep understanding of networking and memory data flows, including technologies such as DPDK, RDMA, or similar high-performance I/O frameworks.
  • Exposure to cloud-scale workload analysis and performance tuning
  • Experience running HPC ( MPI application benchmarks) & AI (NCCL/RCCL benchmarks).
  • Telemetry & Debugging: Investigating PFC deadlocks, packet drops, line-rate throughput, and tail latency using kernel tools, packet captures, and fabric telemetry.
  • Cornelis Networks does not accept unsolicited resumes from headhunters, recruitment agencies, or fee-based recruitment services.
  • We encourage applications from all qualified candidates and will accommodate applicants' needs under the respective laws throughout all stages of the recruitment and selection process.
  • Telemetry & Debugging:
  • Investigating PFC deadlocks, packet drops, line-rate throughput, and tail latency using kernel tools, packet captures, and fabric telemetry.

Compensation

  • We offer a competitive compensation package that includes equity, cash, and incentives, along with health and retirement benefits.

Company info

  • Backed by top-tier venture capital and strategic investors, we are committed to innovation, performance and scalability - solving the world's mo st demanding computational challenges with our next-generation networking solutions.
  • Work directly with customers and field teams to reproduce, debug, and optimize performance issues in production environments.
  • Provide technical guidance and support to customers integrating and tuning our products in their data center infrastructures.
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