Applied Scientist II, Ads AI Core Infrastructure

Amazon Advertising is one of Amazons fastest growing and most profitable businesses responsible for defining and delivering AI-powered solutions that transform how advertisers make strategic decisions. We deliver billions of ad impressions and process massive volumes of advertiser data every single day. Youll work with us to pioneer breakthrough approaches in how AI agents access and reason over real-time advertiser data at scale.

We are using generative AI and agentic systems to help advertising agents provide instant strategic advice to millions of advertisers. You will need to invent new techniques for agent orchestration context optimization and code generation to ensure were delivering accurate trustworthy insights with minimal latency and token consumption. Youll create feedback loops to ensure our solutions are constantly evaluating themselves and improving.

The Ads Real-Time Data Service team is seeking an exceptional Applied Scientist to research and develop novel approaches for agent-data interaction. The Ads Real-Time Data Service team is solving one of the most critical challenges in advertising AI: instant access to advertiser context. Were building the infrastructure that provides immediate pre-computed access to advertiser data via Model Context Protocol (MCP) serversan emerging standard for AI agent-data interaction. Were building summarized data for context using a mix of state of the art techniques like CodeAct and RAG-based embeddings achieving a fundamental transformation in how AI agents interact with data.

This role balances applied research (60%) with productionization (40%) giving you the opportunity to both advance the state of the art and see your innovations deployed at Amazon scale.

Key job responsibilities
Agent Orchestration & Optimization Research
- Research and develop novel algorithms for agent-data interaction patterns that minimize latency token consumption and error rates
- Design and implement CodeAct pattern variations enabling agents to write and execute analytical code in isolated sandboxes
- Investigate multi-agent orchestration strategies for complex advertiser queries requiring data from multiple sources
- Develop techniques for automatic query optimization and caching strategies based on agent behavior patterns

Large Language Model Context & Token Optimization
- Invent new methods for compressing advertiser context representations while preserving semantic meaning and analytical utility
- Research optimal metadata generation techniques that help large language models understand and reason over structured advertiser data
- Design experiments to measure the impact of different data representations on agent response quality and token efficiency
- Develop adaptive context selection algorithms that dynamically choose relevant data based on query intent

RAG-Based Embeddings & Semantic Search
- Pioneer new RAG-based embedding approaches optimized for real-time advertiser data delivery with sub-second latency
- Research and implement semantic search and retrieval techniques for advertiser datasets using vector embeddings
- Design advertiser context frameworks that enable automatic schema mapping from advertiser concepts to data representations
- Develop evaluation frameworks to measure performance across dimensions of latency accuracy and developer experience

Experimentation & Productionization
- Design and execute rigorous experiments comparing traditional API orchestration versus CodeAct patterns and RAG-based approaches across metrics like success rate latency token consumption and response quality
- Analyze large-scale advertiser interaction data to identify patterns bottlenecks and optimization opportunities
- Collaborate with engineering teams to productionize research innovations and deploy them to advertising agents and skills
- Establish evaluation metrics and benchmarks for agent-data interaction performance

A day in the life
You start your morning analyzing experiment results from overnight runs comparing three evaluations for different RAG-based embedding approaches. The data shows that one of the embedding pattern is returning a significant improvement in accuracy. You create a spec file with the findings and start drafting a technical paper to be shared with Amazon AI forume.

Mid-morning youre in a design session with the engineering team discussing how to optimize RAG-based embeddings for semantic search over advertiser data. You propose using a hybrid approach combining dense and sparse embeddings to represent campaign metadata enabling agents to find relevant campaigns through natural language queries while maintaining sub-second latency. You sketch out the architecture and discuss trade-offs between embedding model size search latency and accuracy.

After lunch you dive into advertiser interaction logs from advertising agents and skills. Youre looking for patterns in how advertisers ask questions about their campaigns. You discover that 60% of queries follow a similar structure: filter campaigns by criteria aggregate metrics and compare to benchmarks. This insight leads you to design a new pre-computation strategy using RAG-based embeddings that could reduce query latency by 40%.

In the afternoon you collaborate with an Applied Scientist from an advertising agent team. Theyre seeing inconsistent results when agents try to calculate complex metrics across multiple campaigns. You investigate and discover the issue is related to how the agent interprets the advertiser context. You propose enriching the RAG-based embeddings with richer metadata descriptions and run experiments showing this improves calculation accuracy from 85% to 98%.

Late afternoon youre prototyping a new approach for adaptive context selection using RAG-based embeddings with the spec file you generated earlier. Instead of providing agents with all available advertiser data you want to dynamically select the most relevant datasets based on query intent using semantic similarity. You build a quick proof-of-concept and test it on historical queries. The results are promising: 30% reduction in tokens with no loss in response quality.

About the team
The Ads Real-Time Data Service team is a highly motivated collaborative and fun-loving group of engineers building the foundational platform for Amazons advertising AI future. We are entrepreneurial and have a bias for action with a broad mandate to experiment and innovate. Our team operates at the intersection of real-time data engineering AI agent infrastructure and distributed systems engineeringsolving problems that directly impact how millions of advertisers interact with Amazons advertising products.

We value technical excellence customer obsession and sustainable engineering practices. Our team includes engineers with diverse backgrounds in distributed systems real-time data processing AI/ML infrastructure and platform engineering. We celebrate innovation (patent submissions encouraged) knowledge sharing (weekly tech talks) and continuous learning. We maintain a sustainable pace with minimal on-call burden flexible work arrangements and a strong focus on work-life balance. Were at the forefront of AI-assisted development using tools like Kiro to accelerate our development cycles from weeks to days.


- 3 years of building models for business application experience
- PhD or Masters degree and 4 years of CS CE ML or related field experience
- Experience in patents or publications at top-tier peer-reviewed conferences or journals
- Experience programming in Java C Python or related language
- Experience in any of the following areas: algorithms and data structures parsing numerical optimization data mining parallel and distributed computing high-performance computing

- Experience using Unix/Linux
- Experience in professional software development

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