Software Engineer: High-Performance Networking (ENA)

Amazon Web Services (AWS)

Cupertino (CA)

On-site

USD 165,000 - 224,000

Full time

4 hours ago

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Benefits offered by this job

Health insurance

401(k) matching

Paid time off

Job summary

Annapurna Labs (U.S.) Inc. on the AWS team is seeking a Software Development Engineer to join the ENA Express initiative.

You will design, build, and own features across the full ENA Express software stack: firmware on the Nitro Card, user-space libraries, control plane components, and performance analytics systems that help customers get the most from their network. This high-ownership role runs on a fleet of millions of EC2 instances; you will optimize SRD-based networking, collaborate with

Qualifications

2+ years of non-internship professional software development experience.
Bachelor's degree in computer science or equivalent.
Background in systems programming (C / C++) in performance-critical, production environments.

Responsibilities

Design and develop features across the AWS Networking software stack on Nitro Cards.
Deep-dive into ENA Express and the underlying SRD protocol and L3/L4 networking to optimize packet delivery, reduce tail latency, and improve bandwidth utilization.
Collaborate with hardware and firmware partners to define software/hardware interfaces and surface programmable capabilities to the software layer
Partner with EC2 platform and service teams to integrate ENA Express features into the broader AWS networking ecosystem
Drive operational excellence: build observability, contribute to on-call health, and lead incident response and post-mortems