Amazon · 6 hours ago
Software Development Engineer II, EFA Network - Annapurna Labs
Seattle, Washington, USA
Full-time
Onsite
Mid Level
$144K/yr - $194K/yr
3+ years expAmazon is a leading technology company, and they are seeking a Software Development Engineer II for their EFA Network team. The role involves writing high-performance code in C for multiple open source projects supporting the Elastic Fabric Adapter, while collaborating with teams to innovate in cloud networking.
Artificial Intelligence (AI)DeliveryE-CommerceFoundational AIRetail
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
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
Qualification
Required
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
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
Benefits
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
Parental leave
Company
Amazon
Amazon is a tech firm with a focus on e-commerce, cloud computing, digital streaming, and artificial intelligence.
10001+ employees
H1B Sponsorship
Amazon has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (22803)
2024 (21175)
2023 (19057)
2022 (24088)
2021 (12233)
2020 (14881)
Funding
Current Stage
Public CompanyTotal Funding
$8.11BKey Investors
AmazonKleiner Perkins
2023-01-03Post Ipo Debt· $8B
2001-07-24Post Ipo Equity· $100M
1997-05-15IPO
Leadership Team
Douglas J. Herrington
CEO, Worldwide Amazon Stores
Werner Vogels
VP & CTO
Recent News
2026-01-25
2026-01-25
2026-01-25
Company data provided by crunchbase