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  • Oliveyoung
  • Seoul, Korea

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comstering/README.md

👋 Hi there, I'm Hansu Choi (comstering)

DevOps · Cloud Native Engineer

I narrow the gap between development and operations so teams can focus on business logic, not infrastructure. I started as a backend engineer (Kotlin · Spring Boot) and now build the platform those services run on.

🧰 What I do

  • ☸️ Kubernetes platform — EKS with Karpenter, Istio ambient mesh, Cilium (eBPF), and Operators for stateful components
  • 🏗️ Infrastructure as Code — AWS and Cloudflare managed with Terraform modules, deployed through GitOps (Argo CD)
  • 🔄 CI/CD · Workflow — GitHub Actions (ARC), Argo Workflows, and self-hosted Temporal
  • 🔐 Identity · Zero Trust — Keycloak, Okta SSO, OAuth2 Proxy, and Istio authorization policies
  • 📨 Event streaming — Kafka, Kafka Connect, Debezium CDC, and Schema Registry on Kubernetes
  • 📝 Writing — I only write about what I've actually run: comstering.github.io

🌱 Open source

Contributions

Side project

  • lomeone — side-project org on AWS, with all infrastructure managed in Terraform

🛠 Tech stack

Platform Kubernetes Amazon EKS Helm Docker Istio Cilium

Cloud · IaC AWS Cloudflare Terraform

CI/CD · Workflow GitHub Actions Argo Temporal

Data · Messaging Apache Kafka PostgreSQL MySQL MongoDB

Auth · Security Keycloak Okta

Backend Kotlin Spring Boot

Observability Datadog OpenTelemetry Prometheus

📜 Certifications

HashiCorp Certified: Terraform Associate (004)

🤝 Contact

Tech Blog Resume LinkedIn Gmail

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