I'm Hien Nguyen Ngoc (HienDevWeb), a full-stack WebApp developer helping SMEs, startups and businesses build scalable, secure, high-performance digital products — from landing pages to enterprise systems (ERP, CRM, Logistics, Finance, Tracking, Booking, E-commerce, SaaS), solo or with a development team.
React.js, Next.js, TypeScript, Tailwind CSS
.NET, Java Spring Boot, Node.js
PostgreSQL, MySQL, SQL Server, REST API & system architecture
What I can build for you
Six ways I help businesses and students ship software. Every service below is backed by real projects — tap a project name to see its screenshots.
React / Next.js frontends with Spring Boot, .NET or Node.js backends — auth, payments, wallets, dashboards and admin panels, deployed on your VPS or cloud.
Customer, order, scheduling, inventory, invoicing and payroll systems shaped around how your team actually works — with Excel import so nothing is retyped.
WordPress, Elementor, Webflow or hand-coded sites built from your Figma or my design, with motion, on-page SEO and Core Web Vitals in mind.
WooCommerce shops and custom carts, rental and booking flows, coin wallets and paid content — plus the admin side to manage orders.
C# WinForms / .NET desktop apps on SQL Server, data dashboards and AI features such as speech-to-text, LLM grading and text-to-speech.
1-on-1 or group coaching in JavaScript, Java, Python, C#, React and SQL, plus guidance for coursework, capstones and reports — with clean architecture and tests.
Also available: bug fixing on live sites, WordPress / PHP customization, VPS deployment, backups and ongoing maintenance.
Get a free scope callCase studies
Multi-team web novel marketplace. Readers read or listen with text-to-speech, unlock paid chapters with coins, buy full-story combos and donate to translation teams. Creators get a studio to upload stories from files, schedule chapters, set prices and request withdrawals; admins moderate content, approve top-ups and run ad campaigns.
Customer-care CRM for a water purifier dealer. It tracks every customer's machines, schedules filter replacements automatically, dispatches technicians on a kanban board, issues invoices and calculates sales and technician commissions, so the team knows exactly who to call each day.
Speaking-practice platform for English and Chinese classes. Students watch a model video and submit their own; the AI pipeline extracts audio, transcribes it, scores pronunciation against the target vocabulary and generates a corrective MP3. Teachers review or override the score and notify parents via Zalo in one click.
Luxury hotel website concept in Indochine style: bilingual VN/EN, rooms and suites showcase, experiences and offers, plus a booking bar with dates, guests and promo codes. Pure HTML/CSS/JS, no build step.
Desktop application that manages university internships end to end: students, lecturers, partner companies and their internship positions. Admins assign students to open positions inside a single SQL transaction; lecturers grade results (company 60% + lecturer 40%) and view statistics with GDI+ charts and CSV export.
Client work, products and academic builds — open a card to browse its screenshots, highlights and stack.
Starting prices for fixed-scope projects. You get a written scope and a firm quote after a free call — no surprises. ERP / CRM systems and mentoring are quoted separately, get in touch.
A polished one-page site to validate an idea, promote a product or open bookings — live on your domain within a week.
A multi-page site or long-form sales page you can edit yourself, tuned for speed, SEO and turning visitors into leads.
When a website is not enough: accounts, dashboards, payments or an immersive 3D experience, engineered to scale.