EFA Engineer, AWS Annapurna Labs

Join Annapurna Labs and take part in the development of next generation products that will define the future of the cloud. Annapurna Labs, an Amazon company, is looking for a Senior Software Engineer with experience in networking and software to join the networking SW group. We are looking for a candidate with the ability to thrive in an environment with complex software and hardware designs, who can take ownership and lead the development of key SW components for Amazon network cards. You will take part in developing, integrating, and deploying cutting-edge networking technologies, starting from the identification and definition of project requirements, feature development, deployment and operational support, on a very large scale. As part of your role you will join a team of engineers who are developing software implementing AWS RDMA technology for Machine Learning and High Performance Computing (HPC) customers. Your code will run on millions of servers worldwide as part of the Nitro system. A day in the life The team is responsible for AWS HPC (High performance computing) and ML (Machine learning) networking device SW. For more information we invite you to watch AWS re:Invent 2022 Keynotes HPC7g and ML (from 9:17) and AWS re:Invent 2025 Keynote About the team Diverse ExperiencesAmazon values diverse experiences. Even if you do not meet all of the preferred qualifications and skills listed in the job description, we encourage candidates to apply. If your career is just starting, hasn’t followed a traditional path, or includes alternative experiences, don’t let it stop you from applying. Why AWSAmazon Web Services (AWS) is the world’s most comprehensive and broadly adopted cloud platform. We pioneered cloud computing and never stopped innovating — that’s why customers from the most successful startups to Global 500 companies trust our robust suite of products and services to power their businesses. Work/Life BalanceWe value work‑life harmony. Achieving success at work should never come at the expense of sacrifices at home, which is why flexible work hours and arrangements are part of our culture. Inclusive Team CultureHere at AWS, it’s in our nature to learn and be curious. Our employee‑led affinity groups foster a culture of inclusion that empowers us to be proud of our differences. Ongoing events and learning experiences, including our Conversations on Race and Ethnicity (CORE) and AmazeCon (gender diversity) conferences, inspire us to never stop embracing our uniqueness. Mentorship and Career GrowthWe’re continuously raising our performance bar as we strive to become Earth’s Best Employer. That’s why you’ll find endless knowledge‑sharing, mentorship and other career‑advancing resources here to help you develop into a better‑rounded professional. Basic Qualifications Bachelor’s degree in Computer Science, Computer Engineering, or Electrical Engineering 5+ years of experience coding in C and C++ Deep experience in networking protocols, mainly RDMA/Ethernet Experience in performance optimizations Preferred Qualifications 4+ years of experience with embedded SW development Experience with SoC development life cycle Experience with virtualization technologies Personal characteristics: Team player, highly motivated and committed, passionate about SW development, a fast learner, and willing to work in a dynamic environment. 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 for more information. If the country/region you’re applying in isn’t listed, please contact your Recruiting Partner. Amazon is an equal opportunity employer and does not discriminate on the basis of protected veteran status, disability, or other legally protected status. #J-18808-Ljbffr