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I'm a software engineer at SK AX, building enterprise backend and AI-agent systems.

My experience spans Spring Boot backend development, agentic workflows, RAG-based architectures, private LLM serving, cloud infrastructure, and production operations. I enjoy turning ambiguous requirements and system bottlenecks into software that is traceable, reliable, and practical to operate.

• 🤖 Building enterprise AI agents and AI-assisted delivery workflows
• ⚙️ Designing reliable backend systems and reusable platform modules
• 🚀 Improving application and database performance through measurement
• ☁️ Interested in cloud infrastructure, distributed systems, and observability

May 2026 – Present · SK AX

Currently developing an enterprise QA agent and related automation workflows. More details will be added as the project progresses and disclosure permits.

Dec 2025 – Jun 2026 · SK AX

• Developed common backend modules for the CJ Olive Young Global B2B partner platform, including terms agreement, two-factor authentication, initial password change, and login-session extension.
• Participated in the first project delivered through SK AX's 100% AI-driven software delivery pipeline.
• Contributed reusable guideline prompts for the delivery pipeline.

Jan 2026 – Mar 2026 · SK AX

• Built an AI-driven change-impact analysis and compliance-support pipeline for regulated documents.
• Designed agent orchestration flows and retrieval pipelines for evidence-grounded analysis.
• Developed backend components for traceable execution and actionable review artifacts.
• Strengthened practical experience with agentic workflows, RAG architectures, and enterprise AI systems while respecting client confidentiality.

Jul 2024 – Feb 2025 · Project Lead / System Architect / Backend Engineer

• Re-architected JBNU's coursework WebIDE after a security incident in the legacy environment.
• Introduced Keycloak and Google OAuth2, JWT-based reverse-proxy routing, RBAC, isolated Docker workspaces, and a Squid outbound proxy.
• Led architecture design, sprint planning, backend implementation, and rollout.
• Now used as an official WebIDE platform for coursework at JBNU.

Tech: Docker · Node.js · Spring Boot · OAuth2 · Keycloak · OpenStack · Nginx · Squid

Dec 2024 – Jan 2025 · Infrastructure & AI System Engineer

• Built a private, OpenAI-compatible LLM serving environment on JBNU's JCloud using vLLM and OpenWebUI.
• Deployed inference on dual RTX 4090 GPUs and implemented API-key-based access control.
• Diagnosed tensor-padding and KV-cache memory overhead to select a model suitable for the available VRAM.
• Delivered secure in-house LLM access while reducing dependence on external commercial APIs.

Tech: vLLM · OpenWebUI · OpenStack · Docker · NVIDIA GPU

Nov 2023 – Sep 2024 · Backend Developer

• Developed the backend for an AR-based laboratory safety education platform using Kotlin and Spring Boot.
• Designed core domains and REST APIs, implemented authentication and Redis-backed features, and automated deployment through GitHub Actions.
• Resolved production CORS conflicts between Spring Boot and Nginx by centralizing CORS handling at the proxy layer.
• The project received multiple awards, including a Grand Prize, a Gold Award, and a Silver Award across university and national competitions.

Tech: Kotlin · Spring Boot · MariaDB · Redis · Docker · GitHub Actions · Nginx

📄 Published paper: AR safety training system based on ArUco markers using gyrosensor data and image data

Sep 2023 – Nov 2023 · Infrastructure Engineer / Undergraduate Researcher

• Designed and deployed an isolated OpenStack testbed for JBNU's private IaaS environment.
• Configured Nova, Neutron, Glance, and Keystone to support safe experimentation before production rollout.
• Presented the deployment strategy and JCloud architecture at a developer community meetup held with Samsung Developer Conference Korea 2023.

Tech: OpenStack · Linux · IaaS · Virtual Networking

Sep 2023 – Nov 2023 · Backend Developer / Performance Engineer

• Identified N individual ORM insert queries as the primary write-path bottleneck.
• Replaced single-row writes with JDBC batch inserts and verified the change through load testing.
• Improved response time by approximately 60% while reducing database write amplification.

Tech: Kotlin · Spring Boot · JDBC Batch · JPA · MySQL · Docker

I enjoy making systems more reliable, traceable, and easier to operate.