Software Engineer: High-Performance Networking (ENA)

Amazon Web Services (AWS); Cupertino (CA); On-site; USD 165,000 - 224,000; Full time

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

Skills

2+ years of software development

C/C++ systems programming

Education

Bachelor's degree in computer science or equivalent

Job description

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