Career Profile
I am a software engineer focused on backend and platform (runtime & delivery). I design and ship Spring Boot services in Kotlin/Java and operate them reliably on Kubernetes (AKS/EKS) with production-grade CI/CD and observability. I care about measurable outcomes—latency, error rate, and release lead time—and collaborate across code, pipelines, and runtime to improve both delivery speed and resilience.
Experiences
- Built and operated SUMiTS FM and Safety Management Platform for smart building systems.
- Designed REST APIs and analytics algorithms for real-time collection and analysis of HVAC equipment data.
- Containerized services and operated workloads on Azure AKS; introduced infrastructure-as-code and environment standardization.
- Implemented CI/CD (Jenkins/GitLab CI) and release automation; added canary/blue-green style staged rollouts where applicable.
- Established observability with Prometheus/Grafana and Azure Monitor (Application Insights/Log Analytics) and built an alarm dashboard.
- Energy efficiency: reduced HVAC energy usage by ~20% (internal energy analysis).
- Anomaly/alarm detection accuracy ≥95% based on monitoring logs.
- Improved API response speed by ~30% and enhanced system stability and maintainability.
- Developed an automated content management system using Spring Boot and Selenium.
- Implemented REST APIs with JWT-based authentication; packaged and deployed services via CI/CD.
- Managed scalable AWS infrastructure (EC2, RDS, ALB) and basic container orchestration.
- Automated data collection with Jsoup-based schedulers.
- Increased site traffic by 25% and reduced manual workload by 70%.
- Cut manual deployment time by ~80% via automated release features.
- Reduced authentication failure rate by ~95% after introducing JWT-based auth.
- Built enterprise and fintech solutions for public institutions.
- Developed a 5G MEC platform using Spring Boot and containerized microservices.
- Created secure E2EE messenger, ERP, and IoT management systems.
- Deployed and maintained Docker & Kubernetes-based infrastructure (including EKS where applicable).
- Reduced failure rates by 60% and improved API response times by 35%.
- Security hardening: ~85% reduction in reported vulnerabilities for the E2EE messenger (internal audits).
- User support: ~50% fewer user-reported incidents post-release.
Certifications
Major Projects
Highlighting key projects that integrate backend development with platform reliability—Kubernetes, CI/CD, and observability.
SUMiTS Platform (SK Shieldus)
- Smart building management with real-time HVAC analytics, energy optimization, and alarms.
Viewus Integrated Content Collector (FastView)
- Automated content aggregation using Spring Boot and Jsoup.
Sellermill B2B eCommerce Platform (FastView)
- Refactored backend architecture for large-scale B2B eCommerce system using Spring Boot and AWS Cloud.
E2EE Secure Messenger (OpenObject)
- End-to-end encrypted communication system built with Spring Boot.
5G IIoT MEC Platform (OpenObject)
- Low-latency (−35% API), high-reliability (−60% failures) IIoT platform on Docker & Kubernetes.
Open Source & Blog
I continuously learn and share technical insights through my blog and open-source contributions.
Technical Blog
- Writing about Spring, DevOps, and Cloud architecture.
GitHub Repository
- Personal projects and experimental repositories.
Open-source PR – Toss Frontend Fundamentals
- Docs (JP) — terminology consistency & readability: refined phrasing to "リリースしやすいコード"; merged & verified (#209, 2025-04-11).
Security Disclosure – Yes24
- Acknowledged (Korea, 2025) — KVE-2025-0479.
Security Disclosure – Amano System (Airport Parking)
- Acknowledged (Korea, 2025) — KVE-2025-0494.
Media Features
Featured media articles and interviews about my professional work and development journey.
FastViewKorea Official Blog, 2023