Resume

① Developer Experience & Performance Engineer

Jul 2025 - Present

• Company-wide Development Infrastructure
  • Maintenance, improvement, and release management of a Go-based API gateway
  • Building and operating GitOps-based Kubernetes deployment pipelines using ArgoCD and Kustomize
  • Automating Google Cloud/AWS infrastructure with Terraform and planning/executing GKE cluster version upgrades
• Developer Experience Improvement
  • Standardizing Docker images and unifying versions across multiple services in a monorepo
  • Improving and automating CI/CD pipelines using GitHub Actions
  • Automating component version management and formulating upgrade plans
  • Evaluating and introducing AI-assisted workflows using Claude Code and Gemini
• Performance and Quality Improvement
  • Building E2E test infrastructure and automating test workflows on GKE
  • Operating Kubernetes manifest policy validation using conftest/OPA
  • Driving Go runtime and Kustomize version upgrades

② Software Engineer

Nov 2025 - Present

• OLAP Database Development
  • Development and operation of an OLAP database
  • Maintaining and improving multi-component architecture on GKE
  • Integration with Google Cloud services including BigQuery, Cloud Storage, and Spanner
• E2E Test Infrastructure Design and Implementation
  • Designed and implemented automated E2E test environments on GKE
  • Achieved parallel test execution through PR-based namespace isolation
  • Implemented multi-stage cleanup processing including Config Connector edge cases
  • Built secure CI/CD pipelines using Workload Identity Federation
• Infrastructure and Operations
  • Codifying GKE clusters, Artifact Registry, and IAM with Terraform
  • Implementing Kubernetes Operator version management and auto-update mechanisms
  • Developing E2E test suites including BigQuery integration verification

① Container & Kubernetes Evangelist / Education Leader

Jan 2023 - Jun 2025

• In-house education programs
  • Designed and conducted a 3-month container and Kubernetes learning program
  • Maintained over 90% satisfaction rate
• Technical migration support
  • Led containerization and migration to Kubernetes environments
• Internal and external technical support
  • Technical support for SE and sales teams
  • Container/Kubernetes adoption support for clients

② Kubernetes as a Service (KaaS) Development

Sep 2022 - Jun 2025

• Kubernetes integration with CloudStack
  • CSI Driver, Cloud Controller Manager, and Ingress Controller implementation
  • Custom Kubernetes implementation for company security requirements
• Custom Kubernetes components
  • In-house addon-manager for automatic updates
  • Custom Migration and Cluster Autoscaler implementation
• Multi-platform support and CI/CD
  • Kubernetes setup on private cloud (vSphere)
  • CI/CD environment for managing multiple Kubernetes versions

① Product Order Management System

Feb 2021 - Aug 2021

• Go API development (standard packages only), Shopify integration
• CloudBuild + CloudRun CI/CD on Google Cloud

② International EC Integration System

Feb 2021 - Aug 2021

• Go + Goroutine for 20,000-30,000 daily product registrations
• BigQuery data integration and GUI visualization for non-engineers

① Streaming Infrastructure Renewal

Oct 2019 - Jan 2021

• Led PHP to Go rewrite with Kubernetes-based microservices
• Istio service mesh, Grafana/Prometheus monitoring infrastructure

② DRM Implementation Engineer

Jul 2020 - Oct 2020

• Multi-DRM system (Widevine, PlayReady, FairPlay) design and implementation
• HLS/DASH streaming protocol and DRM integration

• AWS Infrastructure — S3, ECS, ECR, VPC, RDS, ElastiCache cloud infrastructure
• Data Analytics — Redshift Spectrum build and operations
• Containerization & CI/CD — ECS + GitHub Actions pipeline

• Backend and infrastructure support
• Engineer training and learning content for non-engineers
• Container/Kubernetes technical support for FinTech companies