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Yidong Sun

@pro-dev-yidongsun

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Senior software engineer specializing in scalable backend systems, cloud architectures, and real-time platforms.

United States

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What I'm looking for

I seek senior engineering roles building scalable, real-time cloud systems with strong emphasis on CI/CD, DDD, observability, compliance, and mentorship.

I am a senior software engineer with deep experience designing and implementing large-scale, real-time streaming and commerce systems using Java, Node.js, Python, and AWS. I have led architecture and engineering efforts at Amazon, building microservices, event-driven pipelines, GraphQL/ BFF layers, and AI-assisted solutions that improved performance, reduced latency, and ensured GDPR/HIPAA compliance.

I focus on pragmatic, test-driven engineering and mentoring teams toward Domain-Driven Design and operational excellence. My work includes optimizing databases and caching, deploying CI/CD and IaC, and delivering measurable outcomes—such as lowered latency, higher uptime, reduced manual effort, and improved clinical outcomes in healthcare interoperability projects.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

Amazon

Sep 2017 - Present (8 years 6 months)

Designed and implemented Amazon Live's large-scale real-time streaming commerce platform, reducing latency by 120ms and improving data retrieval speeds by 30% while ensuring GDPR/CCPA compliance and automating CI/CD and infrastructure.

Java Spring Boot GraphQL Kafka AWS Terraform PostgreSQL DynamoDB

Software Engineer

HCA Healthcare

Jul 2012 - Aug 2017 (5 years 1 month)

Built high-concurrency interoperability and stream-processing systems using Java and HL7/FHIR that enabled sub-second EHR alerts, contributing to a 20% reduction in sepsis-related mortality and achieving 99.99% uptime during a data center migration.

Java HL7 FHIR EHR Kafka SQL HIPAA compliance