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Added 7 mins ago
Material Handler - Afternoon Shift Mon-Fri 01:30PM-10:00PM
GXO Logistics
Hanahan, SC
…boosts productivity and dedication. On our team, you’ll have the support to excel at work and the resources to build a career you can be proud…
Added 7 mins ago
Material Handler - Day Shift Mon-Fri 05:30AM - 02:00PM
GXO Logistics
Hanahan, SC
…boosts productivity and dedication. On our team, you’ll have the support to excel at work and the resources to build a career you can be proud…
Added 23 mins ago
Senior Quality Manager
Ducommun
Huntsville, AR
…improve product quality, reduce cost of poor quality, enhance customer satisfaction, and support business…
Added 23 mins ago
Associate, Materials Process Engineer (Chemistry Lab)
L3Harris
Camden, AR
Job Title: Associate Materials Process Engineer (Chemistry Lab)
Added 23 mins ago
Manager, Materials Process Engineer
L3Harris
Camden, AR
Knowledge of supply chain production support and manufacturing operations
Added 23 mins ago
Mechanical Engineer (Mechanical Testing)
BAE Systems
Nashua, NH
…advanced electronics, intelligence solutions, and dedicated customer…
Added 23 mins ago
Digital Hardware Engineer
BAE Systems
Totowa, NJ
…electronics, security, information technology solutions and customer support services. If you are an individual that enjoys a cohesive team environment and is interested in a variety of…
Added 24 mins ago
Site Reliability Engineer
Highmark Health
Little Rock, AR
…cross-functional stakeholders to understand assignments, priorities, support tickets, customer needs,…
Added 34 mins ago
PA
Industrial Engineer (Job Code: 176007)
Piston Automotive LLC
North Kansas City, MO
- $87,116 USD / year
…industry; Engineering related communication internally and with the Customer, including technical presentation, design review, capacity analysis, and feasibility studies; utilize and apply…
Added 34 mins ago
Associate Mechanical Systems Design & Analysis Engineer
The Boeing Company
Berkeley, MO
…is seeking an Associate Mechanical Systems Design & Analysis Engineer to join our Instrumentation Installation Design group supporting flight test…
Added 34 mins ago
Project Engineer (Senior or Lead)
The Boeing Company
Saint Charles, MO
Support the development of customer proposals, including development of competitive pricing and delivery dates
Added 34 mins ago
Maintenance Engineer
HCA Healthcare
Independence, MO
…We care like family! Jump-start your career as a Maintenance Engineer today with Centerpoint Medical…
Added 34 mins ago
Senior Solutions Engineer - Kansas, Missouri
NetApp
St Louis, MO
Support multiple customer opportunities simultaneously across a broad territory while maintaining strong responsiveness and customer engagement
Added 35 mins ago
Mobile Engineer
CBRE
St. Louis, MO
As a CBRE Mobile Engineer, you will be responsible for preventive maintenance and corrective repairs for buildings, industrial systems, vehicles, equipment, and grounds.
Added 35 mins ago
O
Lead Principal Site Reliability Engineer - (work in Vienna VA location)
Oracle
Jefferson City, MO
- $96,300 to $264,100 USD / year
We are seeking a highly motivated Site Reliability Engineer (SRE) to support a strategic customer's cloud platform and mission-critical applications. The SRE will be responsible for…
Added 35 mins ago
Site Reliability Engineer
Highmark Health
Jefferson City, MO
…cross-functional stakeholders to understand assignments, priorities, support tickets, customer needs,…
Added 45 mins ago
GA
Senior Systems Engineer SME Cloud Infrastructure & DevSecOps TS/SCI
Geospatial And Cloud Analytics Inc
Qua, VA
- $170,000 to $190,000 USD / year
We are seeking a highly skilled Senior Systems Engineer Subject Matter Expert (SME) to join our team supporting the Naval Criminal Investigative Service (NCIS) in Quantico, Virginia. The…
Added 45 mins ago
GA
Senior Software Engineer Containerized Applications TS/SCI
Geospatial And Cloud Analytics Inc
Qua, VA
- $170,000 to $190,000 USD / year
We are seeking a highly skilled Senior Software Engineer / Containerized Applications Specialist to join our team supporting the Naval Criminal Investigative Service (NCIS) in Quantico,…
Added 48 mins ago
Nuclear Intern - Mechanical/Electrical Engineering North Anna
Dominion Energy
MINERAL, VA
Development of minor design changes to support station reliability improvements.
Added 48 mins ago
Nuclear Intern - Mechanical Engineering Maintenance Support Engineering - North Anna
Dominion Energy
MINERAL, VA
North Anna is looking for a Mechanical Engineering intern for the summer of 2027 to support Maintenance Support Engineering group functions. Accepted candidate will work closely with…
Added 48 mins ago
Specialist, Propulsion System/Rocket Test Engineer
L3Harris
Orange, VA
Job Title: Specialist, Propulsion / Rocket Test Engineer
Added 48 mins ago
Mechanical Commissioning Engineer I
Bureau Vertias North America
VA
Summary: Responsible for providing engineering and technical support to plan, schedule, coordinate, and execute full life cycle commissioning of critical facilities, whilst under direct…
Added 48 mins ago
Electrical Commissioning Engineer I
Bureau Vertias North America
VA
Summary: Responsible for providing engineering and technical support to plan, schedule, coordinate, and execute full life cycle commissioning of critical facilities, whilst under direct…
Added 49 mins ago
Principal Cyber Security Analyst
Applied Research Associates, Inc.
Fort Belvoir, VA
…Subject Matter Expert (SME) for cyber development efforts. This engineer has a strong understanding of the requirements capture process and the full lifecycle of technical cyber development…
Added 49 mins ago
Associate Engineer/ Engineer- Inverter Based Resources Quality Assurance (Glen Allen, VA)
Dominion Energy
GLEN ALLEN, VA
There are two positions available that may be filled at either the Associate Engineer (entry level) or Engineer level (2+ years), commensurate with the successful candidate’s experience,…

Amazon

Software Development Engineer II, EFA Network - Annapurna Labs

Seattle, WA, United States

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Job details

Posting language: English
Posted: Oct 30, 2026

Original job description

Description

Want to help make the next generation of Machine Learning in the cloud possible? Do you have a laser focus on performance in your code? We want to talk to you!

We own the user-space software that makes the Elastic Fabric Adapter (EFA) network card work for Machine Learning (ML) and High-Performance Computing (HPC) customers on AWS. Across multiple projects written in C, our team enables customers to network thousands of GPU and CPU instance types to handle the toughest clustered workloads. Be a part of a dynamic, fast-paced group that has a big impact every day on the hottest companies doing AI and HPC today.

Key job responsibilities

You will write the highest-performing code in C for multiple open source projects supporting EFA, such as Libfabric and Open MPI. You will work with multiple teams in the stack to invent new APIs for the latest concepts in networking in the cloud. Dive deep into how your customers are doing collectives and messaging at high bandwidth and low latency. Provide expert-level support to some of the biggest names in AI in the world.

A day in the life

Start from the needs of your customer and invent new ways of cutting the occupancy of the software stack for EFA. Get your peers and stakeholders on board with excellent written designs. Write comprehensive tests to drive the development of new features and guard against regressions. Work with our ML Infrastructure team to see your products perform on 100s and 1000s of top-end machine clusters.

About the team

We are a fast-paced team that owns the user-space software stack for EFA. As part of Annapurna Labs in AWS we are very nimble, paying careful attention to what the AI industry is going to try next, and having our products ready. We focus heavily on automation, confining operations to the most interesting problems as customers continuously experiment with what our network can do. Our team is a place of growth, concentrating on your career and goals and motivating you to achieve your highest potential.

Basic Qualifications

3+ years of non-internship professional software development experience
2+ years of non-internship design or architecture (design patterns, reliability and scaling) of new and existing systems experience
3+ years of professional experience programming high-performance software in C, ideally as part of an Open Source project

Preferred Qualifications

3+ years of full software development life cycle, including coding standards, code reviews, source control management, build processes, testing, and operations experience
Bachelor's degree in computer science or equivalent
Experience developing in a network software stack, with a focus on cutting occupancy to the barest minimum number of instructions

Amazon is an equal opportunity employer and does not discriminate on the basis of protected veteran status, disability, or other legally protected status.

Our inclusive culture empowers Amazonians to deliver the best results for our customers. If you have a disability and need a workplace accommodation or adjustment during the application and hiring process, including support for the interview or onboarding process, please visit https://amazon.jobs/content/en/how-we-hire/accommodations for more information. If the country/region you’re applying in isn’t listed, please contact your Recruiting Partner.

The base salary range for this position is listed below. Your Amazon package will include sign-on payments and restricted stock units (RSUs). Final compensation will be determined based on factors including experience, qualifications, and location. Amazon also offers comprehensive benefits including health insurance (medical, dental, vision, prescription, Basic Life & AD&D insurance and option for Supplemental life plans, EAP, Mental Health Support, Medical Advice Line, Flexible Spending Accounts, Adoption and Surrogacy Reimbursement coverage), 401(k) matching, paid time off, and parental leave. Learn more about our benefits at https://amazon.jobs/en/benefits .

USA, WA, Seattle - 143,700.00 - 194,400.00 USD annually

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Skills

Software development
AWS
C
Computer science
Recruitment
Mental health

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