Looking for a job

Jiatong User

@jiatonguser

Message

I build scalable backend and generative AI shopping systems for millions of customers.

United States

Message

What I'm looking for

I'm seeking an opportunity to apply my backend and AI engineering expertise to build impactful products from early-stage architecture through production growth.

At Amazon, I've built distributed backend systems, search relevance platforms, and AI-powered shopping experiences for millions of customers. I currently own backend architecture for Rufus, Amazon's conversational shopping experience, using Java and Python services to orchestrate LLM inference, product retrieval, and shopping APIs.

I've built Retrieval-Augmented Generation pipelines across product catalog data, customer reviews, and shopping knowledge sources, improving grounded AI responses by 18%. I also reduced end-to-end conversational AI latency by 35% through caching, request optimization, and distributed-service tuning.

Across Amazon Stores, Search Relevance, and AWS storage infrastructure, I've delivered production AI platforms, distributed data pipelines, cloud APIs, and operational tools. I enjoy taking systems from early architecture through reliable production growth while partnering with scientists, product teams, and engineers.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Development Engineer

Current

Amazon

Jul 2023 - Present (3 years 2 months)

Owned backend architecture for Amazon's conversational shopping experience (Rufus), designing Java and Python services that orchestrate LLM inference, product retrieval, and shopping APIs. Built Retrieval-Augmented Generation pipelines and AI evaluation systems, improving response quality and reducing latency by 35%.