Sr SDE, S3 Object API

Company: Amazon
Location: Seattle
Posted on: April 5, 2026

Job Description:

Amazon Web Services (AWS) is the world leader in providing a highly reliable, scalable, low-cost cloud platform that powers some of the world's most innovative companies. A flagship service of AWS is the Simple Storage Service (S3), which hosts trillions of objects for a variety of applications, ranging from backups to photo storage to Big Data. Customer usage of S3 continues to grow exponentially, and we are constantly expanding our global footprint with new AWS regions. S3 is looking for a senior engineer for the S3 Object API team. The team designs, implements, operates, and improves the S3 API processing for all of S3. Our software processes millions of requests per second and bandwidth measured in terabits per second. We solve challenging customer problems, driving change across S3's vast customer base. You will lead your peer engineers on the team to deliver high-quality and scalable software. You will drive innovation to build the next generation of software to handle our exponential growth. You will code systems and services that allow rapid development to meet the fast-paced nature and interesting challenges that are at the heart of S3’s culture. This is a rare opportunity to make a significant impact on one of the largest cloud services in the world. Join us today! Key job responsibilities What You'll Do: - Design, develop, and maintain highly available services powering Amazon S3 - Build tools and automation to streamline operations, improve CI/CD pipelines, and reduce operational load - Drive best practices for code quality, fleet health, security, and reliability - Mentor junior engineers, helping them grow their skills and effectiveness - Participate in design reviews, operations meetings, and leadership discussions - Write clear documentation to help teams get the most from our services and tools What to Expect: - Ship code frequently and see its real-world impact on a vast customer base - Work alongside engineers who obsess over performance, availability, scalability, and durability - Participate in an on-call rotation—we invest heavily in automation and testing to minimize disruptions - Enjoy a team culture that values work/life balance while maintaining high standards Our Philosophy: At AWS, if you build it, you own it. We hold a high bar for test automation, design reviews, and operational excellence—because our customers demand nothing less. About the team About AWS AWS 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 AWS? Amazon 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. Inclusive Team Culture Here at AWS, it’s in our nature to learn and be curious. Our employee-led affinity groups foster a culture of inclusion that empower us to be proud of our differences. Ongoing events and learning experiences, including our Conversations on Race and Ethnicity (CORE) and AmazeCon conferences, inspire us to never stop embracing our uniqueness. Mentorship & Career Growth We’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. Work/Life Balance We value work-life harmony. Achieving success at work should never come at the expense of sacrifices at home, which is why we strive for flexibility as part of our working culture. When we feel supported in the workplace and at home, there’s nothing we can’t achieve in the cloud. - 5 years of non-internship professional software development experience - 5 years of programming with at least one software programming language experience - 5 years of leading design or architecture (design patterns, reliability and scaling) of new and existing systems experience - Experience as a mentor, tech lead or leading an engineering team - 5 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 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 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, WA, Seattle - 168,100.00 - 227,400.00 USD annually

Keywords: Amazon, Redmond , Sr SDE, S3 Object API, IT / Software / Systems , Seattle, Washington