Full-stack platform for municipal market merchants and stall admins — Next.js (SSR) + Spring Boot. Market-code tenancy, JWT RTR, virtual-account state machine, Jenkins + SSH blue/green deploys. Notices (Tiptap + DOMPurify), Tailwind UI, shared DataTable, mail/password auth, log rotation.
Multi-tenant SaaS ERP live across many sites — 20+ domains: accounting, billing, HR, assets, metering, etc. Meter-query response cut ~65% (~10s → 3–4s). cplxCd tenancy, shared QueryDSL layer, dual security chains. Owned Jenkins CI/CD and blue/green zero-downtime releases (SSH plugin invoking remote deploy scripts).
Apartment illegal-parking patrol. TFLite plate detection + OpenCV/OCR pipeline, aptERP SaaS integration. Android native + Next.js in WebView hybrid, Spring Boot API and admin web. Play Store release. SSO vs client-credentials split, AWS EC2, Docker/standard hybrid deploy.
New Kotlin Android app (my THEH / my HILLS) for Hyundai E&C apartment residents. Built core app architecture, key screens, RealmDB local caching, and WebView Bridge communication layer.
Mobile e-voting for residents — RSA tally, ActiveMQ-driven PII purge and auth-server integration across the election lifecycle. Feign for auth/file MSA; Swagger for app-team collaboration.
Hillstate / THE H resident life-support requests, bookings, assignments. Full helper domain, RFC 5545 rrule, Android WebView SSO. Feign for auth/file MSA; Swagger docs. 3–4+ daily requests per site after launch.