# Fabric Modeling and Analysis Engineer for Scale Up Fabric at Astera Labs

- Company: Astera Labs
- What the company does: Astera Labs: Purpose-Built Connectivity for Rack-Scale AI.
- Company website: https://www.asteralabs.com
- Type: Startups
- Level: Mid level
- Location: San Jose, California, United States
- Work setup: On-site
- Pay: $185K to $240K base salary per year (USD)
- Posted: 2026-07-30
- Apply by: 2026-10-12
- Apply: https://job-boards.greenhouse.io/asteralabs/jobs/4720171005
- Page: https://www.1752.vc/careers/jobs/astera-labs-fabric-modeling-and-analysis-engineer-for-scale-up-fabric/

## About the role

Astera Labs is powering the connectivity behind rack-scale AI, and our Scorpio Scale-Up Fabric is central to how tomorrow’s GPU clusters scale. As a Fabric Modeling and Analysis Engineer, you will own the performance models that shape this fabric — quantifying bandwidth, latency, and throughput ceilings, and predicting how Scorpio hardware behaves under real AI/ML workloads long before silicon exists.

## What they're looking for

- Simulation Infrastructure & Model Correlation
- Improve simulator fidelity, scalability, debuggability, and runtime performance across packet-level, flow-level, and analytical backends, and build reusable abstractions and APIs for end-to-end simulation flows
- Continuously calibrate and validate models against benchmark data from the Performance Engineering team, owning the correlation between model predictions and measured silicon across scale up fabric generations
- Analytical & Fabric Performance Modeling
- Design and implement transaction-level or cycle-approximate system models of the Scale up fabric, enabling rigorous evaluation of new architectural ideas early in the design cycle, well before tape-out
- Model AI/ML collective communication patterns (AllReduce, AllGather, ReduceScatter) and next-generation features such as advanced congestion control, In-Network Computing, and novel resiliency at scale

Tags: CTO Office