Software Development Engineer, PostX - APEX

Requirements

• 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
• 3+ years of full software development life cycle, including coding standards, code reviews, source control management, build processes, testing, and operations experience
• Amazon is an equal opportunity employer and does not discriminate on the basis of protected veteran status, disability, or other legally protected status.

Additional Information

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. Key job responsibilities - 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

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