Amazon
Software Development Engineer II, EFA Network - Annapurna Labs
$144K–$194K
Seattle, WA · Full-time · Posted Oct 29, 2026
- Experience
- 3+ years of non-internship professional software development; 2+ years of non-internship design or architecture; 3+ years of professional high-performance C programming experience.
- Education
- Bachelor's degree in computer science or equivalent.
About the job
Develop and support high-performance user-space software for AWS’s Elastic Fabric Adapter, enabling low-latency, high-bandwidth networking for machine learning and HPC workloads.
What you'll do
- Write high-performance C code for EFA open-source projects such as Libfabric and Open MPI, and develop networking APIs.
- Design and test features that reduce software-stack occupancy and prevent regressions.
- Support AI customers and work across teams to evaluate performance on large machine clusters.
What they ask for
- 3+ years of non-internship professional software development experience.
- 2+ years of non-internship design or architecture experience for new and existing systems, including design patterns, reliability, and scaling.
- 3+ years of professional experience programming high-performance software in C.
Nice to have
- 3+ years of full software development life cycle experience.
- Bachelor's degree in computer science or equivalent; experience developing in a network software stack.
Pay
143,700.00 - 194,400.00 USD annually (base salary)
Tools
C, Libfabric, Open MPI, EFA
AI focus
Enables machine learning workloads through high-performance, low-latency networking for AI and ML infrastructure.
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