Lê Văn Xuân HoànNacy DevDa Nang, Vietnam

Le Van Xuan Hoan

Full-stack developer ·

I build complete web products, from the first requirement to the deployed system, and publish digital products for other builders under the name Nacy Dev.

See selected work Visit Nacy Dev

Two names, one maker

One person behind the code and the catalog.

Whether you hire me to engineer a custom platform or pick up a commercial theme from my catalog, the architecture, code, and support come from the same desk.

The developerCLIENT & PRODUCT ENGINEERING

Le Van Xuan Hoan

Client work and engineering. I take on full-stack projects for businesses and own them end to end: scoping, building, shipping, and supporting.

Requirement gathering & business analysis
React, Next.js, NestJS, Laravel & Spring Boot
PostgreSQL & MySQL relational schema design
Production deployment & post-launch maintenance

The product labelINDEPENDENT DIGITAL CATALOG

Nacy Dev

My independent label. Website templates, Shopify themes, Framer plugins, and other digital products that I design, build, and publish myself.

Commercial Next.js & HTML website templates
Shopify Theme Store & e-commerce storefronts
Framer plugins & interactive motion components
Clean architecture & buyer-ready documentation

Background

Grounded in real delivery.

Every number below comes directly from shipped client systems, production maintenance, and infrastructure work.

EXPERIENCE
~2
years of freelance full-stack development
Owning complete web builds from requirement analysis to production support.
PRODUCTION
10+
commercial websites delivered for local and international clients
Spanning e-commerce storefronts, booking platforms, and custom business systems.
INFRASTRUCTURE
3 mo
as System and Data Intern at the Da Nang City Information Technology Infrastructure Center
Hands-on municipal IT systems, structured data operations, and infrastructure reliability.

Languages & AI

Multilingual & AI-assisted workflow.

Certified Japanese proficiency, technical English reading, and daily AI-accelerated engineering.

JLPT N3
Japanese
Japanese-Language Proficiency Test, Level N3
English Communication
English
English reading comprehension for technical documentation
AI + Engineering
AI-Accelerated Delivery
Integrating LLM APIs into real products with full human architecture & review.

Selected work

Three products, built end to end.

A current selection from client work, real products, and personal projects. The complete collection is coming to the Showcase.

011 / 3Frontend template
Northstar
AI Chatbot Workspace Next.js Template
A frontend template for building an AI chat workspace that runs entirely in the browser with a built-in MSW and IndexedDB mock API, ready to connect to any backend via its OpenAPI 3.1 contract.
Role
Frontend developer
Built with
Next.js 16
React 19
TypeScript
Tailwind CSS
Framer Motion
Open live site
What it does
Chat workspace with simulated streaming, Markdown, and code blocks
Interactive tool studio (Image Studio, Web Search, Canvas, Skill Runner)
Context rail for session state, attached documents, and tool config
9 workspace pages: Library, Projects, Agents, Gems, Skills, MCP, Plugins, Schedules, Help
In-browser mock API powered by MSW, IndexedDB, and OpenAPI 3.1 contract
English and Vietnamese localization with next-intl
022 / 3Real product
Aetheria Admin
Next.js Beauty & Skincare Ecommerce Dashboard
A full-stack multi-brand beauty and skincare e-commerce operations dashboard pairing a Next.js 16 admin console with a NestJS REST API and PostgreSQL database, plus an offline browser mock mode.
Role
Full-stack developer
Built with
Next.js 16
React 19
TypeScript
Tailwind CSS
Framer Motion
NestJS
PostgreSQL
Open live site
What it does
30+ admin pages across catalog, variants, brands, inventory, orders, and customers
Full-stack backend architecture powered by NestJS and PostgreSQL
Dual data source mode switching between REST API and offline browser seed data
Dense data tables with sorting, filtering, editing dialogs, and skeleton states
Revenue, order, and campaign analytics charts with Recharts and ApexCharts
Command palette, role-protected routes, and typed i18n dictionaries
033 / 3Real product
Aetheria Botanicals
Skincare & Beauty Next.js Storefront Template
A luxury editorial skincare and beauty e-commerce storefront spanning 35 responsive routes, backed by a NestJS and PostgreSQL commerce engine alongside an interactive skin diagnostic quiz.
Role
Full-stack developer
Built with
Next.js 16
React 19
TypeScript
Tailwind CSS
Framer Motion
NestJS
PostgreSQL
Open live site
What it does
35 responsive storefront routes for catalog, collections, brands, and editorial journal
Full-stack commerce backend built with NestJS and PostgreSQL
Interactive multi-step skin quiz mapping skin concerns to personalized rituals
Botanical ingredients encyclopedia with active formulation spotlights
Sliding cart drawer, 4-step checkout flow, and real-time order status lookup
Customer account portal with profile, saved addresses, wishlist, and order history

Explore all 11 products in the Showcase

From brief to support

I don’t hand off halfway.

My projects are usually delivered by one person across the whole lifecycle. Every step below is work I do myself.

01Step 1
Discovery
Requirement gathering
Listening first: goals, constraints, and what the business actually needs to launch.
02Step 2
Scoping
Business analysis
Turning requirements into flows, data, and a scope the client can agree on.
03Step 3
Interface
Frontend development
Responsive interfaces in React and Next.js, built to be fast and accessible.
04Step 4
Services
Backend development
APIs and business logic with NestJS, Laravel, or Spring Boot.
05Step 5
Data Model
Database architecture
PostgreSQL and MySQL schemas for products, orders, customers, and operations.
06Step 6
Intelligence
LLM integration
Connecting LLM APIs where they solve a real problem inside the product.
07Step 7
Release
Deployment
Taking the build to production and making sure the release holds up.
08Step 8
Operations
Technical support
Diagnosing issues after launch, finding the root cause, and fixing it.

Full stack, literally

Four layers. One builder.

The tools I reach for at each layer of a product.

Layer 01InterfaceUI · SSR · Motion · Accessibility
Frontend
Responsive, accessible interfaces with component systems that stay easy to maintain.
- React
- Next.js
- TypeScript
- HTML/CSS
- Tailwind CSS
Layer 02LogicREST · Auth · Domain Services
Backend
APIs and business logic for product, order, customer, and business management systems.
- NestJS
- Laravel
- Spring Boot
Layer 03MemoryACID · Indexing · Migrations
Databases
Relational schemas designed around how the business actually operates.
- PostgreSQL
- MySQL
Layer 04IntelligenceLLM APIs · Agentic Workflows
AI and developer tools
LLM APIs inside products, and AI-assisted tools in my everyday delivery workflow.
- LLM API integration
- Claude Code
- Cursor
- Antigravity
- Codex
- Lovable

The product labelCommercial Digital Product Studio

Nacy Dev

Nacy Dev is the name I use to publish digital products for other builders. Each one is designed, coded, documented, and released by me.

What I publish

Pick up a sticker and move it around.

Website templatesEditorial & commercial web layouts
Framer pluginsCanvas tools & workflow extensions
Shopify themesOS 2.0 storefronts for brands
Next.js templatesApp Router + TypeScript starters
HTML templatesZero-dependency static builds
Software and digital productsStandalone utilities & micro-tools

6 product lines · Designed & engineered in-house

Clean Architecture
Typed Codebases
Buyer Documentation
Zero Lock-in

Where to find Nacy Dev

Storefronts across marketplaces. New ones are added as the catalog grows.

Wrapmarket
Coded website templates for modern frameworks.
Visit store
Gumroad
Digital products and direct downloads.
Store link coming soon
Shopify Theme Store
Shopify themes through the official Theme Store.
Store link coming soon

Data-driven directory · Storefront links activate as each catalog goes live.

Get in touchOpen for new projects & collaborationsBased in Da Nang, Vietnam (UTC+7)VI · JA (JLPT N3) · EN

Have a product in mind? Let’s build all of it.

For freelance projects, collaborations, roles, or questions about a Nacy Dev product, email is the fastest way to reach me.

Email[email protected]

Elsewhere

GitHub @hoanle0126Code and engineering projects (opens in a new tab)

Full-stack developer ·

I build complete web products, from the first requirement to the deployed system, and publish digital products for other builders under the name Nacy Dev.

Le Van Xuan HoanLe VanXuan Hoan

Le Van Xuan Hoan

Nacy Dev

Grounded in real delivery.

Multilingual & AI-assisted workflow.

Japanese

English

AI-Accelerated Delivery

Northstar

What it does

Aetheria Admin

What it does

Aetheria Botanicals

What it does

Requirement gathering

Business analysis

Frontend development

Backend development

Database architecture

LLM integration

Deployment

Technical support

Frontend

Backend

Databases

AI and developer tools

Nacy Dev

What I publish

Where to find Nacy Dev

Have a product in mind? Let’s build all of it.

Elsewhere

Le Van Xuan HoanLe VanXuan Hoan

Le Van Xuan Hoan

Nacy Dev

Grounded in real delivery.

Multilingual & AI-assisted workflow.

Japanese

English

AI-Accelerated Delivery

Northstar

What it does

Aetheria Admin

What it does

Aetheria Botanicals

What it does

Requirement gathering

Business analysis

Frontend development

Backend development

Database architecture

LLM integration

Deployment

Technical support

Frontend

Backend

Databases

AI and developer tools

Nacy Dev

What I publish

Where to find Nacy Dev

Have a product in mind? Let’s build all of it.

Elsewhere

Le Van Xuan Hoan

Le Van Xuan Hoan