I am a Web / App Developer and Full-stack Developer who builds practical production systems across frontend UI, backend APIs, database logic, infrastructure, automation, and AI-assisted developer workflows.
My work spans PHP-based production web systems, Blazor WebAssembly business tools, .NET / ASP.NET API development, database-backed operational workflows, and AI automation using OCR, RAG-oriented crawling, and coding agent workflows.
Simple UI. Clear API. Traceable data flow.
Maintainable structure. Automation where repetition hurts.
AI where context and iteration become expensive.
| Product Systems | Operational Automation | AI Developer Workflow |
|---|---|---|
| UI, API, database, and service workflows connected into usable business tools. | Repeated work converted into traceable queues, logs, validation, and recovery flows. | Token-aware handoff, compact context transfer, quality gates, and coding-agent workflow design. |
| Area | What I am building toward |
|---|---|
| AI-assisted Development | Token-aware handoff, coding agent workflow design, compact context transfer, and quality gate concepts. |
| Business Web Systems | Practical admin tools, member-facing pages, operational workflows, and database-backed business logic. |
| Automation | OCR-assisted validation, background workers, queue processing, logging, and repeatable workflow design. |
| Project / Work | Summary | Stack / Keywords |
|---|---|---|
| relay-baton | Token-aware handoff harness for Codex CLI and Claude Code. Supports compact handoff documents, repository maps, diff summaries, command logs, quality gate concepts, and safety-oriented handling for child agent processes. | TypeScript, Node.js, pnpm workspace, Ink TUI, Vitest |
| Full-stack Business Web Systems | Production workflows connecting frontend pages, backend services, database logic, payment-related processing, member-facing pages, admin portals, and menu integration. | PHP, .NET, ASP.NET, SQL, REST API |
| Email / Fax / Document Processing | Recipient management, attachment handling, delivery history, document/fax API migration, validation flows, file metadata, and operational tracking. | Blazor, .NET API, SQL, File Upload, Background Worker |
| AI / OCR / RAG Automation | OCR-assisted validation, structured field extraction, prompt tuning for inconsistent document formats, RAG-ready crawling, and AI-assisted development workflows. | OCR, RAG, Firecrawl, Crawl4AI, OpenWebUI, Codex CLI, Claude Code |
| Project | Description | Stack |
|---|---|---|
| relay-baton | Token-aware handoff harness for Codex CLI and Claude Code. | TypeScript, Node.js, pnpm, Ink, Vitest |
| portfolio_react | React portfolio website. | JavaScript, React |
| portfolio_node | Node-based portfolio project. | JavaScript, Node.js |
| Jajungur | Java-based trading-style web system project. | Java |
| jundangdaebu | Website project using server-rendered templates. | EJS |
| AIprogram | AI learning and experiment repository. | Jupyter Notebook |
| ASP.NET | ASP.NET practice repository. | C# |
| ci4_tutorial | CodeIgniter 4 tutorial and practice repository. | PHP |
| python_django | Django practice repository. | Python, Django |
| library | Java library program project. | Java |