Hyeonsoo Lee
Software Engineer - Server at Devsisters
Seoul, South Korea
Summary
👤
Senior🎓
Top SchoolHyeonsoo Lee is a pragmatic server-side software engineer with nine years of experience building cloud-native, distributed systems and infrastructure for logistics, smart factories, and IoT. Skilled in Scala, Java, TypeScript and Go, he combines functional programming and systems fundamentals with hands-on Kubernetes, IaC (Terraform/CDK/Helm/ArgoCD) and GitOps practice to deliver vendor-agnostic, production-grade platforms. He has led teams and DevOps efforts, migrated managed services to on-premise environments, and implemented observability and cost controls for clustered deployments. Notable open-source contributions include extending the widely used AWS CDK—adding API Gateway V2, AppSync HTTP datasource support, and RDS/Cognito improvements—demonstrating strong cloud infrastructure-as-code expertise. Based in Seoul, he pairs a systems mindset with practical domain knowledge in shipping, WMS and OPC-UA smart factory integrations. Colleagues describe him as cultured and versatile, a fast learner who prefers efficient, aesthetic code.
9 years of coding experience
12 years of employment as a software developer
Bachelor's degree Computer Engineering, Bachelor's degree Computer Engineering at Pukyong National University
English
Stackoverflow
138reputation
6kreached
3answers
1question
Github Skills (17)
aws-appsync10
aws-cdk10
typescript10
cloud-infrastructure10
typescript-types10
infrastructure-as-code10
typescripts10
rds9
amazon-cognito9
playframework6
dependency-injection6
go6
amazon-ec26
amazon-web-services6
scala6
Programming languages (10)
Github contributions (5)
aws/aws-cdk
May 2020 - Aug 2020
The AWS Cloud Development Kit is a framework for defining cloud infrastructure in code
Role in this project:
Back-end Developer & Cloud Engineer
Back-end Developer & Cloud EngineerContributions:10 commits, 16 PRs, 74 comments in 3 months
Contributions summary:Hyeonsoo contributed significantly to the AWS Cloud Development Kit (CDK) framework, primarily by adding features and modifying existing code related to API Gateway V2 and AppSync. They implemented CORS preflight configurations for HTTP APIs and added support for HTTP data sources in AppSync, showcasing expertise in building and extending cloud infrastructure-as-code solutions. Furthermore, the user introduced new features for RDS and Cognito including database proxy implementation and improved user pool configuration.
development-kitaws-cloudcloud-infrastructureinfrastructurecloud-development
civilizeddev/aws-cdk
Mar 2020 - Jul 2020
The AWS Cloud Development Kit is a framework for defining cloud infrastructure in code
Contributions:51 pushes, 16 branches in 4 months
development-kitaws-cloudcloud-infrastructureinfrastructurecloud-development
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