Senior Performance Engineer - AI Fabric & GPU Scale

Astera Labs; San Jose (CA); On-site; USD 135,000 - 170,000; Full time

Job summary

Astera Labs in San Jose, CA is seeking a Senior Performance Engineer to define how we measure scale-up fabric performance and to quantify our performance leadership on real AI workloads running on GPUs at scale.

You will build roofline models, benchmarks, and end-to-end workload studies that influence architecture, firmware, and product decisions while shaping our marketing narrative in AI connectivity.

Qualifications

• Bachelor's degree in Computer Engineering, Computer Science, Electrical Engineering, or related field.
• 2–5 years of industry experience in performance or systems engineering.
• Experience running AI/ML workloads on GPU clusters with benchmarking and tuning.

Responsibilities

• Define how the world measures scale-up fabric performance and build roofline models.
• Develop and maintain baseline performance benchmarks using NVBandwidth and NCCL across GPU configurations.
• Quantify impact of fabric features (e.g., Hypercast, In-Network Computing) against baselines.
• Run end-to-end inference workloads to capture real-world performance beyond benchmarks.
• Evaluate fabric performance as inference cluster size scales (16–32 GPUs and beyond).
• Design head-to-head performance comparisons against competing fabric solutions.

Skills

AI/ML workloads knowledge

GPU systems

PCIe/Ethernet fundamentals

Python scripting

Performance analysis

Education

Bachelor's degree in Computer Engineering, Computer Science, Electrical Engineering, or related field

Tools

NVBandwidth

NCCL

CUDA

MPI

Job description

Astera Labs in San Jose, CA is seeking a Senior Performance Engineer to define how we measure scale-up fabric performance and to quantify our performance leadership on real AI workloads running on GPUs at scale.

You will build roofline models, benchmarks, and end-to-end workload studies that influence architecture, firmware, and product decisions while shaping our marketing narrative in AI connectivity.