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Added 1 min ago
Lead Principal Electrical Engineer III or IV (SBI LOE3)
Northrop Grumman
Chandler, AZ
Added 1 min ago
Principal RF Data Link Engineer
RTX Corporation
tucson, AZ
Perform hardware and software Communication Architecture trade studies.
Added 1 min ago
Senior Principal Low Observables Material Engineer
RTX Corporation
tucson, AZ
CAD software proficiency and technical programming experience (Python, C++, MATLAB, etc.)
Added 1 min ago
Principal Digital Factory Engineer IV
RTX Corporation
tucson, AZ
We are seeking a Principal Digital Factory Engineer to design, develop, integrate, and support advanced digital factory solutions deployed across multiple Raytheon manufacturing sites. This…
Added 2 mins ago
Principal Systems Engineer
Honeywell Aerospace
Phoenix, AZ
As the Principal Systems Engineer, you will guide a team responsible for the requirements-based engineering of APU control system functions and components. While providing direction and…
Added 4 mins ago
Principal Navigation Engineer
Mach Industries
Huntington Beach, CA
Mach Industries is seeking a Principal Navigation Engineer to lead the development, integration, and flight validation of navigation systems for autonomous aircraft and related defense…
Added 29 mins ago
Mission Autonomy Software Developer
CORP-Corporate Office
United States
Northrop Grumman Aeronautics Systems has an opening for a Software Engineer or Principal Software Engineer position to join our team of qualified, diverse individuals onsite in El Segundo,…
Added 54 mins ago
Senior Security Engineer
State of Delaware
Dover, DE
The principal responsibility is to provide highly effective security engineering support for DTI’s cloud environments, applications, and identity services. Services will be delivered…
Added 1 hour ago
Construction Project Manager
Hoxton Circle
Redwood City, CA
…building owners, and clients. The position reports to the company principal and is based in our Bay Area office, with regular visits to active…
Added 2 hours ago
Staff Software Engineer, WarehouseOS
HOJ INNOVATIONS, INC
Salt Lake City, UT
We are hiring our first Staff Software Engineer to lead WarehouseOS workstreams, from clarifying ambiguous problems through rollout and production follow-through.
Added 2 hours ago
Principal Engineer
BAE Systems
Norfolk, VA
BAE Systems is hiring for a Principal Engineer to support primarily at its Norfolk, Virginia site. The position will occasionally provide support in San Diego, CA, and Jacksonville, FL. In…
Added 2 hours ago
O
Principal AI Agent / Software Engineer- Nashville
Oracle
Nashville, TN
- $114,600 to $234,600 USD / year
The Principal AI Agent / Software Engineer is a Senior Staff-level, hands-on technical leadership role responsible for defining, building, and operating next-generation AI systems on Oracle…
Added 3 hours ago
J
QA/Test Engineer
Jobot
Gaithersburg, MD
- $150,000 to $175,000 USD / year
…initiative involves developing and validating cloud-native software systems that support aviation operations, with an emphasis on automation, software quality, security, and modern testing…
Added 3 hours ago
2027 Summer Internship: Design Engineer- Autonomous Vehicle Platform
PACCAR
Denton, TX
…information technology, and distributes truck parts related to its principal…
Added 3 hours ago
Technical Recruiter
elly
Remote, United States
…growing client roster, from founding engineers to senior and principal talent. You’ll own each search from kickoff through close, partnering directly with founders and engineering leaders…
Added 3 hours ago
IC
Server Architect
Intel Corporation
OR · MA · CA · TX · AZ
- $220,920 to $311,890 USD / year
As a Principal Engineer in CPU Architecture, you will be at the forefront of developing and driving the end-to-end architectural specifications for cutting-edge, modular, and scalable CPUs…
Added 3 hours ago
Principal / Sr. Principal Software Engineer - Onsite Customer Integration
Northrop Grumman
Melbourne
Northrop Grumman Aeronautics Systems Sector has an opening for a Principal / Sr. Principal Software Engineer - Onsite Customer Integration to join Global Surveillance Division supporting…
Added 3 hours ago
Senior Principal Mechanical Systems Engineer
Northrop Grumman
Annapolis
…horizons. The Mechanical Engineering Department is seeking a Senior Principal Mechanical Systems Engineer to join our team of qualified, diverse…
Added 3 hours ago
Principal Engineer Software
Northrop Grumman
Orlando
Northrop Grumman Defense Systems has an opening for a Principal Software Engineer. We are looking for you to join our team as a Principal Software Engineer based out of Orlando, FL. As a…
Added 3 hours ago
Principal Engineer/Sr. Principal Engineer Digital-RF Subsystems I&T Lead
Northrop Grumman
Baltimore
This is a Dual-level opening, candidates will be considered at both a level 3 (Principal Engineer) or 4 (Sr. Principal Engineer) based upon the Basic Qualifications listed below.
Added 3 hours ago
Principal Engineer Software (AHT)
Northrop Grumman
Wright-Patterson AFB
Northrop Grumman Defense Systems (NGDS), Beavercreek Ohio, is seeking a Full Stack Software Engineer. Successful candidates will demonstrate a broad skill set balanced between interpersonal…
Added 3 hours ago
Sr. Principal Software Engineer
Northrop Grumman
Beavercreek
Northrop Grumman Defense Systems (NGDS), Beavercreek Ohio, is seeking a Sr Principal Software Engineer. The successful candidate will demonstrate a broad skill set balanced between…
Added 3 hours ago
Principal/Sr. Principal FPGA Engineer
Northrop Grumman
Rolling Meadows
As a Principal / Sr. Principal FPGA Design Engineer, you will join a diverse, high-performing team responsible for the end-to-end development of advanced RF and EO/IR products. You will…
Added 3 hours ago
Engineer/Principal Engineer (Level 2/3)
Northrop Grumman
Redondo Beach
…CA is looking for an experienced, hard-working, and reliable Engineer/Principal Engineer (Level 2/3) to join our diverse team. We support all areas and phases of air and space builds from…
Added 3 hours ago
Principal Guidance Navigation Control Engineer - 20430*
Northrop Grumman
Manhattan Beach
Northrop Grumman Defense Systems is seeking Principal Guidance Navigation Control Engineer - 20430. This position will be located in Manhattan Beach, CA and will support GSSC.

Amazon.com Services LLC

Software Development Engineer II, Efficiency & Performance, Alloy, Region Flex Efficiency

Sunnyvale, CA, United States

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Job details

Posting language: English
Posted: Nov 2, 2026

Original job description

Amazon runs one of the world’s most complex eCommerce platforms, where operational efficiency directly drives profitability and customer satisfaction. Efficiency is core to Amazon’s DNA, reflected in the Leadership Principle of Frugality and the Flywheel strategy that lowers cost structures to fuel growth. With the cost of operating Amazon’s global infrastructure measured in billions of dollars, achieving true economies of scale rather than allowing scale to increase costs is essential to our success.

The Alloy team serves as Amazon’s central efficiency organization, leading company-wide cost optimization through intelligent and automated use of AWS resources. Our work spans thousands of internal services, enabling large-scale efficiency improvements with minimal engineering effort from partner teams. We drive optimization across multiple layers of Amazon’s stack, focusing on GPU efficiency infrastructure for AI/ML workloads through centralized scheduling, software performance profiling, and end-to-end storage optimizations through data lifecycle management. These cross-cutting initiatives transform isolated team optimizations into scalable, safe, and reusable systems that continuously improve efficiency across Amazon.

As a Software Development Engineer in Alloy, you will collaborate with service and infrastructure teams across Amazon to identify and eliminate performance bottlenecks in large-scale distributed systems. You will design and build mechanisms to measure, analyze, and automate performance improvements, using data to set and drive company-wide efficiency goals. You will work closely with Principal and Distinguished Engineers, gaining exposure to Amazon’s most advanced systems while developing deep technical expertise and leadership skills. Your work will directly influence how Amazon’s software and services operate at scale, delivering measurable cost savings in the tens to hundreds of millions of dollars each year and advancing Amazon’s commitment to operational excellence and sustainability.

In this role, you will:

Solve performance and efficiency problems that manifest at scale.
Design metrics and measure performance and cost efficiency of services in Amazon's ecosystem.
Collaborate with service teams to identify inefficiencies, and design and implement solutions.
Design and develop highly available components and profiling tools.

Key job responsibilities

Design and implement software solutions across the full development lifecycle - from product definition and scoping through coding, testing, deployment, and ongoing maintenance - ensuring high-quality, maintainable, and well-documented code.
Collaborate with customers, stakeholders, and cross-functional peers to understand business and customer needs, translating requirements into scalable system designs that account for performance, security, and extensibility tradeoffs.
Identify and resolve operational issues at their root cause, driving improvements to team operations and reducing support costs through proactive problem-solving and process enhancements.
Evaluate and integrate generative AI tools where appropriate to augment productivity and quality, applying responsible practices to refine outputs and accelerate development workflows.
Mentor and coach fellow engineers through code reviews and knowledge sharing, actively training new team members on system architecture, construction, and operational best practices.

About the team Our team is focused on building reliable, scalable software that directly impacts Amazon's customers. We value collaboration, clear communication, and a commitment to continuous improvement. Every engineer has a voice in technical decisions, and we encourage thoughtful debate to arrive at the best solutions. We are investing in new capabilities and looking for engineers who are excited to help shape our technical direction, grow their skills, and contribute to an inclusive environment where everyone can do their best work. 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
1+ years of software development engineer or related occupational experience
1+ years of designing and developing large-scale, multi-tiered, multi-threaded, embedded or distributed software applications, tools, systems, and services using: C#, C++, Java, or Perl experience
1+ years of full software development life cycle, including coding standards, code reviews, source control management, build processes, testing, and operations experience
1+ years of programming using a modern programming language such as Java, C++, or C#, including object-oriented design experience
Bachelor's degree or foreign equivalent in Computer Science, Engineering, Mathematics, or a related field 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
Knowledge of system performance, memory management, and parallel computing principles

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

Los Angeles County applicants: Job duties for this position include: work safely and cooperatively with other employees, supervisors, and staff; adhere to standards of excellence despite stressful conditions; communicate effectively and respectfully with employees, supervisors, and staff to ensure exceptional customer service; and follow all federal, state, and local laws and Company policies. Criminal history may have a direct, adverse, and negative relationship with some of the material job duties of this position. These include the duties and responsibilities listed above, as well as the abilities to adhere to company policies, exercise sound judgment, effectively manage stress and work safely and respectfully with others, exhibit trustworthiness and professionalism, and safeguard business operations and the Company’s reputation. Pursuant to the Los Angeles County Fair Chance Ordinance, we will consider for employment qualified applicants with arrest and conviction records.

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, CA, Sunnyvale - 165,200.00 - 223,600.00 USD annually

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