Senior Principal Engineer, AI Networking Validation

Upscale, Inc.; United States; On-site; USD 263,000 - 284,000; Full time

Job summary

Upscale, Inc. in the United States is seeking a senior individual-contributor in validation for its high-performance AI networking platform. You will own test strategy, feature readiness, and release sign-off, debugging cross-stack failures, with primary depth in traffic management.

You will mentor QA engineers, build validation frameworks, and collaborate across software, SDK, model, silicon, and Linux to ensure robust data-path behavior under RoCEv2 and NCCL/RCCL workloads.

Qualifications

• 15+ years in networking software, system validation, or ASIC/platform QA.
• Deep hands-on traffic management: PFC, scheduling, buffers, classification and marking, queueing, ECN/WRED.
• Strong L2/L3 and ACL fundamentals, and experience with SAI, a switch SDK, or a NOS such as SONiC or FBOSS.
• Ownership of validation frameworks and automation, not only test execution.
• Python or Go at framework-review level; solid Linux and packet- and counter-level debugging.

Responsibilities

• Own the validation strategy, test plans, coverage, and release entry/exit criteria for the features above.
• Qualify lossless and congestion behavior under RoCEv2 and GPU collectives (NCCL/RCCL) at line rate.
• Build the frameworks and debug tools the team depends on, including model-based checks of classification, queueing, scheduling, and drop or mark outcomes.
• Lead root-cause analysis across software, SDK, model, silicon, and Linux, and decide when the spec, the implementation, or the test is wrong.
• Mentor QA engineers, review their plans and automation, and represent validation in design reviews and the development-to-QA handoff.
• Support customer deployments, proofs of concept, and field issues on data-path and congestion behavior.

Skills

Networking validation

Traffic management

Python or Go

Linux debugging

Mentoring

Tools

SAI

Switch SDK

SONiC

FBOSS

Job description

Upscale, Inc. in the United States is seeking a senior individual-contributor in validation for its high-performance AI networking platform. You will own test strategy, feature readiness, and release sign-off, debugging cross-stack failures, with primary depth in traffic management.

You will mentor QA engineers, build validation frameworks, and collaborate across software, SDK, model, silicon, and Linux to ensure robust data-path behavior under RoCEv2 and NCCL/RCCL workloads.