Software Engineer, ENA Express Networking

Amazon Web Services (AWS); Cupertino (CA); On-site; USD 165,200 - 223,600; Full time

Job summary

Annapurna Labs (U.S.) Inc. in Cupertino, CA is seeking a Software Development Engineer to design, build, and own features across the ENA Express software stack.

You will work on firmware, user-space libraries, control plane components, and performance analytics systems to serve EC2 instances at scale. You will collaborate across hardware, firmware, and platform teams to optimize packet delivery, tail latency, and bandwidth, while driving observability and on-call health.

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.
• Experience in Linux and Networking protocols, or experience in Linux OS and network troubleshooting.

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

C/C++

Systems programming

Networking concepts

Education

Bachelor's degree in Computer Science or equivalent

Tools

Linux

Virtualization

Job description

Annapurna Labs (U.S.) Inc. in Cupertino, CA is seeking a Software Development Engineer to design, build, and own features across the ENA Express software stack.

You will work on firmware, user-space libraries, control plane components, and performance analytics systems to serve EC2 instances at scale. You will collaborate across hardware, firmware, and platform teams to optimize packet delivery, tail latency, and bandwidth, while driving observability and on-call health.