Software Development Engineer, PostX - APEX

Amazon Advertising is one of the fastest-growing businesses at Amazon, connecting brands with customers across the store, Prime Video, Twitch, and the open internet. The tech stack spans real-time bidding, creative serving, audience targeting, measurement, and billing, all operating at a scale where small inefficiencies cost real money.

Within Amazon Advertising, the APEX (Advertising Post-X Events) team owns what happens after an ad is served. When an ad is played for a customer, a chain of events fires that determines whether the advertiser gets charged, whether the publisher gets paid, and whether anyone can prove any of it happened. That’s us.

APEX processes billions of these events daily across every ad format Amazon supports. As an SDE on this team, you’ll own real-time systems where correctness isn’t aspirational; it’s the product. Latency budgets are tight, scale is massive, and the blast radius of a bad deploy is measured in dollars per second., Design and implement features for real-time event processing systems handling billions of events per day

• Own end-to-end delivery of software components: requirements, design, implementation, testing, deployment, and operational support
• Build and maintain distributed systems that process advertising signals (impressions, pixels, clicks, video completions) with low latency at high throughput
• Participate in on-call rotations and operational excellence initiatives to maintain 100% availability (not a typo; let’s talk)
• Contribute to architecture decisions for event pipelines, caching layers, and data transformation services
• Write high-quality, maintainable code with thorough unit and integration test coverage
• Collaborate with partner teams across the ad serving stack (bid request, creative rendering, reporting, billing)
• Mentor teammates and participate in code/design reviews

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 Object Oriented Design experience
• Bachelor’s degree or foreign equivalent in Computer Science, Engineering, Mathematics, or a related field
• Experience programming with at least one software programming language

Preferred Qualifications

• 3+ years of full software development life cycle, including coding standards, code reviews, source control management, build processes, testing, and operations experience

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, Mountain View - 165,200.00 - 223,600.00 USD annually