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EFA Network Software Engineer I, Annapurna Labs

Seattle, Washington, United States💼 Full-time💰 $110,500–$160,000🗓 2026-07-22 → 2026-09-26

Core

Develop high-performance user-space software for the Elastic Fabric Adapter (EFA) network card to enable Machine Learning and High-Performance Computing workloads on AWS.

Role type

Senior IC systems software engineer (networking)

Builds

Open source projects (Libfabric, Open MPI) and EFA user-space stack

Domain

Cloud infrastructure, High-Performance Computing (HPC), Machine Learning infrastructure

Deliverable

production ML models | product features

Required skills

C programming, systems programming, memory management, performance optimization, Linux, Git, build processes

Preferred skills

Open source contributions, computer networking protocols, distributed systems, HPC/ML infrastructure concepts, full software development lifecycle

Technologies

C, Libfabric, Open MPI, Linux, Git

Responsibilities

Write high-performance C code for EFA support projects, invent new APIs for cloud networking, provide expert-level support to AI customers, write comprehensive tests for new features

Seniority

Mid-level to Senior, hands-on IC

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