About
"I build the tools technical support runs on."
I'm a Technical Support Engineer for cross-border e-commerce. I started in network infrastructure, moved through IT support and VMware virtualization, and now build the developer tools that turn multi-hour investigations into seconds. Across three languages and four roles, the work underneath has been the same: find what's actually causing a problem and fix it at the root.
Experience
Global-e · Technical Support Engineer
Dec 2025 – Present
Seoul, South Korea (Hybrid) · Application / SQL / Tech Support Team
- End-to-end merchant technical support with full case ownership and precise issue analysis
- Root cause analysis through application logs, SQL diagnostics, and debugging tools
- Cross-functional escalation coordination across global time zones
- Concurrent case management prioritized by impact, urgency, and cross-team dependencies
PuzzleSystems · Technical Support Engineer
Jun 2025 – Nov 2025
Yeongdeungpo District, Seoul · Virtualization / VMware / Cloud Platform Team
- Periodic inspections and vulnerability assessments across VMware environments
- Remote and on-site technical support for NSX-based network virtualization
- Windows 11 VDI migration deployment for enterprise clients
- IDC network reliability and security improvement
Toss Insurance · Technical Support Engineer
Jan 2025 – May 2025
Guro District, Seoul · Internal System / Operation / System Platform Team
- Windows / macOS environment support; Microsoft 365 user lifecycle and licensing
- IP exhaustion and subnet misconfiguration diagnostics affecting Wi-Fi
- Google Workspace 2FA and security access exception management
- Malware detection accuracy validation, reducing false positives
- Python + Slack Bot security solution provisioning automation
- Hypervisor-based isolated environments for public-institution software conflicts
Ubiquoss · Technical Support Engineer
Apr 2023 – Apr 2024
Seongnam, Gyeonggi · Network / Architect / Overseas Tech Team
- Led Local 5G Network Architect project with POSCO DX, independently managing design, installation, and maintenance (first lead project after promotion)
- Redundant monitoring and failover paths for data center traffic reliability
- Ultra-low-latency / high-bandwidth tuning + L4 load balancing
- L3 switch OS validation for defect detection and stability
- Real-time technical support for customers in Korea, Japan, and the U.S.
Ubiquoss · Technical Support Associate
Feb 2023 – Apr 2023
Seongnam, Gyeonggi · Network / Architect / Overseas Tech Team
- Key contributor to Local 5G Network Architect project with NAVER CLOUD
- Proposed active-active network design with redundancy for high bandwidth, low latency, and stability
- Validated designs in-house through simulation environments to support field installation
- CIDR-based subnetting for department / floor segmentation and access control
Education
- Academic Credit Bank System, Bachelor's degree in Computer Science (Jan 2021 – Aug 2024)
- Cisco Networking Academy, Certificate Program in System / Networking / LAN/WAN Management (2021 – 2022)
Certifications
- HashiCorp Certified: Terraform Associate (003)
- Network Administrator II (네트워크관리사 2급), KAIT
- JLPT N1, Japanese Language Proficiency Test
Languages
- Korean: Native
- English: Professional working proficiency
- Japanese: Native (JLPT N1)
Skills
Languages
TypeScriptPythonSQLBashPowerShell
Infrastructure & Network
LinuxWindowsmacOSNetwork (L2/L3)5G RAN/CoreSNMPTCP/IPVirtualization (VMware vSphere / NSX)Security
Data & Observability
MSSQLSnowflakeSQLiteCoralogix
Tooling & Automation
MCP (Model Context Protocol)PlaywrightChrome DevToolsLocal LLM (ollama)IaC (Terraform)Atlassian (JIRA / Confluence)ZendeskMicrosoft 365
Open to conversations. See Contact.