Open to opportunities

Simon Choi

@simonchoi

Message

I build scalable cloud and backend services for high-volume enterprise workflows.

United States

Message

What I'm looking for

I'm looking to build and modernize scalable cloud-native backend services, solve complex reliability challenges, and contribute to architecture decisions and cross-team technical leadership.

At Microsoft, I build backend and cloud applications across Azure and AWS-connected enterprise services, supporting 8M+ monthly transactions through Python, Java, Lambda, Step Functions, Kafka, and REST APIs.

I've led modernization across 15+ services, introduced asynchronous Kafka-based workflows and caching to deliver 3x throughput, and reduced recurring P1 incidents from 9 to 2 per quarter using CloudWatch-driven troubleshooting.

Before Microsoft, I developed healthcare and wellness SaaS applications at Tivity Health, processing 4M+ monthly transactions across Java and C# services. I helped migrate 10+ legacy components toward cloud-ready services, cutting release cycles from three weeks to six days.

I enjoy combining hands-on development with system design, cloud migration, operational improvements, and technical mentorship. I've guided engineers through architecture reviews and production-readiness practices while building reusable patterns and shared tooling.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer II

Current

Microsoft

Jan 2022 - Present (4 years 7 months)

Owned hands-on backend and cloud application development across Azure and AWS-connected enterprise services, with emphasis on modernization, reliability, and scalable API architecture. Architected Python and Java backend services using AWS Lambda, Step Functions, Kafka, and REST APIs, supporting 8M+ monthly transactions across distributed workflows.