Senior Network Software Engineer

AWS Utility Computing (UC) provides product innovations — from foundational services such as Amazon’s Simple Storage Service (S3) and Amazon Elastic Compute Cloud (EC2), to consistently released new product innovations that continue to set AWS’s services and features apart in the industry. As a member of the UC organization, you’ll support the development and management of Compute, Database, Storage, Internet of Things (Iot), Platform, and Productivity Apps services in AWS. Within AWS UC, Amazon Dedicated Cloud (ADC) roles engage with AWS customers who require specialized security solutions for their cloud services.Annapurna Labs, as part of AWS, is looking for a Senior Network SW Engineer to join the SW group and take a major part in redefining the future of AWS cloud.We’re searching for engineers with a passion for networking to develop SRD (Scalable Reliable Datagram). SRD is a high-performance, low-latency transport protocol used within Amazon Web Services (AWS) infrastructure to optimize network performance. SRD powers several high-impact, cutting-edge products, including on-demand ML and HPC platforms leveraging EFA, next-generation storage services built on EBS, and the future of AWS network traffic.“The Tail at AWS Scale” paper (2024): Cloud-Optimized Transport Protocol for Elastic and Scalable HPC“ paper (2020): job responsibilitiesAs a Senior Network Software Engineer on SRD team, your primary role will be to develop and optimize the implementation of SRD technology across AWS's network infrastructure. Your responsibilities will encompass designing, deploying, and maintaining SRD code-base, ensuring its reliability and scalability to accommodate the demands of various applications. An essential part of your role will involve conducting extensive network simulations to evaluate system performance under different conditions, enabling you to identify potential bottlenecks and inefficiencies. Using these simulations, you will troubleshoot network issues and implement robust solutions, leading to minimal data loss and latency. Leveraging your in-depth understanding of network protocols and AWS infrastructure, you'll refine and improve the SRD system's performance. Furthermore, you will be expected to mentor junior team members, leading projects to advance the SRD capabilities within the AWS environment. Staying updated with the latest industry trends and incorporating them into strategic network service planning.Basic QualificationsBachelor’s (or higher) Degree in Computer Science (CS), Electrical Engineering (EE) or related area.8+/10+ years of programming with at least one software programming language experiencePreferred QualificationsExperience as a mentor, tech lead or leading an engineering teamExperience leading the architecture and design (architecture, design patterns, reliability and scaling) of new and current systemsData-center NetworkingNetwork related simulatorsLarge-scale distributed environmentsStorage and/or Transport protocolsReal-Time developmentOur 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.Based on your recent activity, you may be interested in:Posted: October 8, 2025 (Updated 2 days ago)Posted: September 3, 2025 (Updated about 2 months ago)Posted: October 31, 2025 (Updated 3 months ago)Posted: November 25, 2025 (Updated 29 days ago)Posted: January 14, 2026 (Updated 2 days ago)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