Software Development Engineer, AWS EC2 VPC NX

Do you want to shape the future of virtualized (SDN) networking in the worlds biggest public cloud

The Amazon Elastic Compute Cloud (EC2) VPC Packet Pipeline team owns the packet pipeline that runs right beneath all our customers EC2 VPC instances adding features like firewalling (security groups) billing and monitoring as we touch every single packet on every single host across our massive worldwide fleet. Our vision is to combine the performance of bare metal networking while maintaining all the benefits of the cloud including delivering features not possible on bare metal i.e. true Software Defined Networking (SDN).

We are seeking a Software Engineer to join our EC2 Nitro Fairness team where youll help ensure equitable resource allocation in our multi-tenant cloud infrastructure while maintaining the single-tenant experience customers this role youll develop sophisticated algorithms and systems that intelligently manage shared compute memory
and network resources across diverse customer workloads. Youll design and implement sophisticated fairness algorithms real-time resource schedulers and performance isolation systems that operate at microsecond latencies across millions of concurrent EC2 instances within the Nitro hypervisor. This position requires deep understanding of virtualization technologies distributed systems and performance optimization as youll be directly impacting how millions of EC2 instances share underlying hardware while appearing completely isolated to end users. Youll collaborate closely with hardware teams hypervisor engineers and service owners to implement fairness policies that balance resource utilization efficiency with strict performance guarantees.

Key job responsibilities
Technical Leadership & Development:
Lead architecture decisions for fairness algorithms and resource allocation systems within the Nitro hypervisor
Mentor junior engineers on low-level C/Rust programming and embedded system development practices
Conduct design and code reviews for performance-critical fairness mechanisms
Drive implementation of resource isolation and scheduling policies in embedded Nitro environments

Performance Analysis & Optimization:
Analyze customer workload patterns to identify fairness violations and noisy neighbor scenarios
Design and implement hardware-aware fairness algorithms leveraging CPU cache locality memory bandwidth and network resources
Collaborate with hardware engineering teams to optimize packet-pipeline software and hardware offloads for equitable resource sharing
Set and achieve fairness performance goals for new instance types and Nitro hardware generations

Cross-Team Collaboration & Strategy:
Partner with hardware/firmware teams on co-designing fairness enforcements
Collaborate with other engineering vertical teams to ensure fairness features integrate seamlessly across the stack
Communicate fairness requirements and technical designs to senior management and product teams
Evaluate emerging technologies for ML-based instance types and their impact on resource fairness

System Design & Implementation:
Develop real-time fairness monitoring and enforcement systems operating at microsecond latencies
Implement dynamic resource allocation policies that adapt to changing workload characteristics
Design telemetry and observability systems to measure and validate fairness across multi-tenant environments

- 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
- Experience programming with at least one software programming language
- Experience in embedded development in C/C

- 3 years of full software development life cycle including coding standards code reviews source control management build processes testing and operations experience
- Bachelors degree in computer science or equivalent
- 2 years of embedded firmware development experience

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 for more information. If the country/region youre applying in isnt 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 WA Seattle - 143700.00 - 194400.00 USD annually