Operating Production Systems · Open Source Contributor
👋 About
Backend engineer operating a 24/7 high-availability public service system. Contributing to Spring Framework, MyBatis, and Reactor projects.
Focus areas: Transaction processing · Memory management · Reactive programming · Production operations
🌟 Open Source Contributions
✅ Merged
- Fixed ThreadLocal memory leak in lazy loading proxy implementations
- Resolved 4-year-old issue affecting thread pool environments
- Added ErrorContext cleanup in 3 proxy classes
Reactor · PR #4207 (Co-author)
- Enhanced subscription patterns documentation
- Added warnings about fire-and-forget anti-patterns
- Included in Reactor 3.7.17 milestone
🔄 In Review
- Enhanced transaction management documentation with programmatic configuration
- Added Java and Kotlin examples alongside XML
- Extracted code to separate files following Spring's documentation patterns
📚 View detailed retrospectives →
💼 Experience
Backend Engineer @ LT Metric
2026.02 - Present
Operating a 24/7 road name address public service system.
- Production infrastructure: Spring Boot, Redis, Oracle
- Redis caching layer and session management
- Oracle database operations and query optimization
- GitLab CI/CD automated deployment pipeline
- System monitoring and incident response
Stack: Spring Boot · Redis · Oracle · GitLab CI/CD · Docker · Linux
Backend Developer @ Allforland
2025.09 - 2025.12
Backend development and server-side implementation.
🛠️ Tech Stack
Production
Languages & Tools
🏆 Achievement
12th Korea SW Convergence Hackathon - Excellence Award Ministry of Science and ICT (과학기술정보통신부)
📫 Contact
Email: kimjiseob1209@gmail.com
📊 Stats
🧮 Algorithm