I build reusable platforms, not just features — workflow engines, real-time collaborative editors, dynamic form builders, multi-tenant CMS, RBAC systems, and internal frameworks. Hands-on experience in the e-government domain (public service portals, digital identity, e-office) with strong demands on security, complex authorization, and large-scale document processing.
Languages
Frontend
Mobile
Backend
Data & Messaging
- Cross-platform architecture — Comfortable owning both NestJS (Node) and .NET (Clean Architecture / DDD), choosing the right tool per problem.
- Platform thinking — I build shared frameworks, engines, and libraries instead of one-off solutions.
- Distributed & event-driven systems — SQL + NoSQL + Redis + Kafka/RabbitMQ + GridFS, background jobs, observability, resilience.
- End-to-end type safety — tRPC + Zod + TypeScript from database to UI.
- Security & compliance — Keycloak SSO, fine-grained RBAC, JWT, digital signatures, audit logs.
| Project | Highlights |
|---|---|
| Workflow Engine | Multi-level document review/publishing state machine + low-code drag-and-drop workflow designer |
| Collaborative Editor | Real-time co-editing with Yjs (CRDT) + TipTap + WebSocket, live cursors, versioning, PDF/DOCX export |
| Dynamic Form Engine | Google Forms–style, JSON-configured forms with conditional logic, business-rule validation & Word mail-merge |
| File Service | MongoDB GridFS streaming storage for large files, versioning, watermarking, Dockerized |
| Multi-tenant CMS / Portal | Subdomain tenancy, page builder (GrapesJS), dashboard builder, OnlyOffice integration |
| Modular .NET Platform | E-gov ecosystem (e-office, e-invoice, e-sign, e-survey, VietQR, Vietnam Post) + self-built Util.* shared libraries |
| Internal Starter Framework | NestJS + Next.js boilerplate: base services (Mongo/Postgres), audit log, request context, custom RBAC |
| SSO / IAM | Centralized authentication with Keycloak + custom admin client |
| Job Portal & University Recruitment | Job-search and campus recruitment platform — job/company listings, applicant tracking, online interviews via Zoom, SEO-optimized (multilingual sitemaps, SSR/ISR) |
| University Public Service Portal | E-gov service portal for universities — dynamic procedure forms, online dossier submission, multi-tenant per institution |
| E-Citizen Portal (Khánh Hòa Province) | Provincial digital-citizen platform — public services, notifications, realtime updates, web + mobile |
| E-Invoice System | Electronic invoicing — invoice generation, QR code (VietQR), built on the modular .NET platform |
| HRM System | Human resource management — employees, departments, attendance, question bank, document management |
| Mobile E-Gov Suite | React Native apps: digital identity, e-office, e-notary — realtime SignalR, push, Fastlane CI |
- Windows Server (IIS):
web.configURL rewrite, SPA fallback, ARR reverse proxy, iisnode - Linux: Nginx reverse proxy (TLS, gzip, static cache, WebSocket proxy) + PM2 / systemd, Docker / docker-compose
- SEO: Next.js Metadata API, dynamic multilingual sitemaps with hreflang, robots, SSR/ISR, Core Web Vitals
