Sr Software Development Engineer, Sponsored Products and Brands

What You'll Own

• Real-Time Proxy Bidding Engine (Tier 1) — Define and lead the engine that computes per-request bids at sub-millisecond latency, build the ML inference infrastructure serving model outputs at bid-request time, and establish patterns that scale to billions of daily decisions
• GenAI & Agentic Intelligence Layer — Architect AI systems using LLMs, reinforcement learning, and preference optimization that learn from bidding outcomes and advertiser feedback; design agent-to-agent protocols, session lifecycle management, and model fine-tuning pipelines
• Experimentation Infrastructure — Design systems supporting multiple concurrent online experiments, enabling the team to test bidding strategies and AI optimization approaches with speed and statistical rigor

How You'll Lead

• Identify what needs to be built before it becomes obvious and frame technical strategy for ambiguous challenges
• Drive alignment across engineering, product, and science teams
• Mentor and develop engineers; represent the team in cross-org design reviews and principal engineering forums
• Make independent architectural decisions on hard problems—escalate only when broader organizational alignment is required

About the team

The Sponsored Products and Brands team at Amazon Ads is re-imagining the advertising landscape through industry leading generative AI technologies, revolutionizing how millions of customers discover products and engage with brands across Amazon.com and beyond. We are at the forefront of re-inventing advertising experiences, bridging human creativity with artificial intelligence to transform every aspect of the advertising lifecycle from ad creation and optimization to performance analysis and customer insights. We are a passionate group of innovators dedicated to developing responsible and intelligent AI technologies that balance the needs of advertisers, enhance the shopping experience, and strengthen the marketplace.

Basic Qualifications

• 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
• Experience with distributed systems at scale
• Experience with Generative AI technologies including large language models (LLMs), model fine-tuning, RLHF, RAG, and agentic architectures

Preferred Qualifications

• 5+ years of full software development life cycle, including coding standards, code reviews, source control management, build processes, testing, and operations experience
• Master's degree in computer science or equivalent
• Experience in an online advertising role and have familiarity with advertising products and ad serving technologies
• Experience developing, deploying and managing AI products at scale