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Jeff User

@jeffuser8

Message

I build reliable AWS-native microservices, full-stack commerce platforms, and production AI workflows.

United States

Message

At Amazon, I build AWS-based customer-facing services for shopping discovery, AI-guided experiences, pharmacy fulfillment, and Buy with Prime checkout. I develop Java microservices, REST APIs, React features, and Python automation supporting high-volume workflows, recommendations, order visibility, and merchant operations.

Previously at Raytheon, I led simulation orchestration and hardware-in-the-loop testing systems, modernizing engineering infrastructure with Java, Spring Boot, Python, Docker, and event-driven workflows. I focus on reliability, observability, production operations, and practical AI workflows using Amazon Bedrock, LangChain, LangGraph, RAG, guardrails, and structured outputs.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

Amazon

Oct 2024 - Present (1 year 11 months)

Built and supported AWS-based production services and distributed applications, contributing to highly available customer-facing workloads. Delivered full-stack features for Amazon's shopping discovery and AI-guided customer experience platform.

Software Engineer

Amazon

Jun 2020 - Oct 2024 (4 years 4 months)

Engineered production features for AWS-based pharmacy customer and fulfillment systems, supporting account enrollment, prescription order visibility, delivery tracking, and customer notifications. Developed Java-based microservices and REST APIs for prescription order lookup and fulfillment status aggregation.

AWS Java Python REST APIs Microservices DynamoDB Lambda S3 Amazon SQS SNS IAM Cloudwatch CI CD Docker Kubernetes Spring Boot

Senior Software/Systems Engineer

Raytheon

Jan 2012 - Jun 2020 (8 years 5 months)

Led development of mission-critical simulation orchestration services for hardware-in-the-loop and system integration testing. Modernized legacy engineering infrastructure and automation using Java, Spring Boot, Python, REST APIs, and Docker.

Java Spring Boot Python REST APIs Docker Jenkins Git Linux RabbitMQ ActiveMQ Splunk ELK Stack C++C#Matlab Simulink LabVIEW TestStand TCP UDP Serial Communication CI CD

Electrical Engineering Intern

RidgeTop Group

Jun 2011 - Dec 2011 (6 months)

Assisted with schematic layout, PCB design, drafting, prototype assembly, and hardware verification for engineering development projects. Developed interactive telemetry and data-visualization features using NI LabVIEW.