Cornelis Networks delivers the world’s highest performance scale-out networking solutions for AI and HPC datacenters. Our differentiated architecture seamlessly integrates hardware, software and system level technologies to maximize the efficiency of GPU, CPU and accelerator-based compute clusters at any scale. Our solutions drive breakthroughs in AI & HPC workloads, empowering our customers to push the boundaries of innovation. Backed by top-tier venture capital and strategic investors, we are committed to innovation, performance and scalability - solving the world’s most demanding computational challenges with our next-generation networking solutions.
We are a fast-growing, forward-thinking team of architects, engineers, and business professionals with a proven track record of building successful products and companies. 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.
We’re seeking an AI Performance Engineer that will optimize training and multi-node inference across next-gen networking silicon and systems—adapters, switches, and the software stack that ties it all together. You’ll partner with architecture, firmware, software, and lighthouse customers to turn lab results into field-proven wins with an emphasis on distributed serving architectures and P99-aware optimizations.
Key Responsibilities
- Own end-to-end performance for distributed AI workloads (training + multi-node inference) across multi-node clusters and diverse fabrics (Omni-Path, Ethernet, InfiniBand).
Minimum Qualifications
- B.S. in CS/EE/CE/Math or related
- 5–7+ years running AI/ML at cluster scale.
- Proven ability to set up, run, and analyze AI benchmarks; deep intuition for message passing, collectives, scaling efficiency, and bottleneck hunting for both training and low-latency serving.
- Hands-on with distributed training beyond single-GPU (DP/TP/PP, ZeRO, FSDP, sharded optimizers) and distributed inference architectures (replicated vs sharded, tensor/KV parallel, MoE).
- Practical experience across AI stacks & comms: PyTorch, DeepSpeed, Megatron-LM, PyTorch Lightning; RCCL/NCCL, MPI/Horovod; Triton Inference Server, vLLM, TensorRT-LLM, Ray Serve, KServe.
Preferred Qualifications
- M.S. in CS/EE/CE/Math or related
- Scheduler expertise (SLURM, PBS) and multi-tenant cluster ops.
- Hands-on profiling & tracing of GPU/comm paths (Nsight Systems, Nsight Compute, ROCm tools/rocprof/roctracer/omnitrace, VTune, perf, PCP, eBPF).
- Experience with NeMo, DeepSpeed, Megatron-LM, FSDP, and collective ops analysis (AllReduce/AllGather/ReduceScatter/Broadcast).
- Background in HPC performance engineering or storage (BeeGFS, Lustre, NVMeoF) for data & checkpoint pipelines.
Location: This is a remote position for employees residing within the United States.
We offer a competitive compensation package that includes equity, cash, and incentives, along with health and retirement benefits. Our dynamic, flexible work environment provides the opportunity to collaborate with some of the most influential names in the semiconductor industry.
At Cornelis Networks your base salary is only one component of your comprehensive total rewards package. Your base pay will be determined by factors such as your skills, qualifications, experience, and location relative to the hiring range for the position. Depending on your role, you may also be eligible for performance-based incentives, including an annual bonus or sales incentives.
In addition to your base pay, you’ll have access to a broad range of benefits, including medical, dental, and vision coverage, as well as disability and life insurance, a dependent care flexible spending account, accidental injury insurance, and pet insurance. We also offer generous paid holidays, 401(k) with company match, and Open Time Off (OTO) for regular full-time exempt employees. Other paid time off benefits include sick time, bonding leave, and pregnancy disability leave.
Cornelis Networks does not accept unsolicited resumes from headhunters, recruitment agencies, or fee-based recruitment services. Cornelis Networks is an equal opportunity employer, and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law. 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.
