Open for projects
Quoc Nguyen

AppXDev

Founded by Quoc Nguyen • Ho Chi Minh City

We ship products people actually use.

build fast? ship even faster!

We've spent 16 years building software — from ERP engines and healthcare apps to AI tools. We care about shipping things that actually work.

AI ChatbotsWeb AppsBackend APIsAutomation
16+Years Building Software
60+Locations Deployed
99.97%System Uptime
30+Projects Shipped
Software Development Services

Everything you need, built

From enterprise ERP systems to AI platforms — we've spent 16+ years shipping things that actually work.

16+
Years Experience
MS
Azure · .NET
20+
Projects Delivered
GCP
Firebase · Cloud Run

Core Services

Built from years of actually doing it

ERP & Business Systems

Enterprise Resource Planning

Build comprehensive ERP systems: inventory, sales, HR, accounting. Multi-branch integration, real-time reporting, automated workflows.

CRM & sales management
Inventory & supply chain
Reporting & analytics
Discuss this

Fractional CTO

Technical Leadership, Part-Time

Architecture decisions, tech roadmap, hiring guidance, and stack choices — without the full-time salary. Right fit for startups that need a CTO brain but not a full-time headcount.

Tech roadmap & architecture
Engineering hiring support
From $2K/month, flexible
Discuss this

AI & Machine Learning

AI-Powered Solutions

Plug AI into your apps: smart chatbots, RAG pipelines, AI agents that run themselves, model fine-tuning, and NLP.

GPT-4, Claude, Gemini
RAG & Knowledge Base
Autonomous AI Agents
Discuss this

Web Application

Full-Stack Web Apps

Modern web app development with React, Next.js, Vue, Angular. Full-stack from frontend to backend, responsive, SEO-optimized.

React, Next.js, Vue, Angular
REST & GraphQL APIs
Auth & security
Discuss this

Mobile Development

Cross-Platform Mobile Apps

Build iOS & Android apps with .NET MAUI, React Native, Flutter. From management tools to commerce apps.

MAUI, React Native, Flutter
Backend API integration
Push notification & offline
Discuss this

Cloud & DevOps

Cloud Infrastructure & CI/CD

Deploy infrastructure on Azure, AWS, GCP. Docker, Kubernetes, CI/CD pipelines, monitoring & auto-scaling.

Azure, AWS, GCP
Docker & Kubernetes
CI/CD & monitoring
Discuss this

Also experienced with

Backend & API.NET, Node.js, Python, Go
Bot DevelopmentTelegram, Discord, Slack
Healthcare ITEMR/EHR, HIPAA, Telehealth
Game DevelopmentUnity, Three.js
Desktop AppsWPF, WinForms, MAUI
AutomationPlaywright, Selenium, Python
E-commerceShopify, Stripe, Amazon

How We Work

4 steps from idea to product

01

Strategy Session

Tư vấn

30-min call. We ask the right questions so we understand exactly what you need.

02

Plan & Agreement

Hợp đồng

Detailed quote by milestone. Clear timeline. You pay per phase, not upfront.

03

Build & Demo

Phát triển

Weekly demos via video call. All code on Git — you see every commit.

04

Ship & Support

Bàn giao

You own everything — source code, docs, and 30 days of free post-launch support.

Tech Stack

Frontend

ReactVue.jsNext.jsAngularTypeScriptTailwind CSS

Backend

C# .NETNode.jsPythonGoFastAPIASP.NET Core

AI / ML

OpenAI GPT-4ClaudeGeminiLangChainRAGFine-tuning

Mobile

.NET MAUIReact NativeFlutterXamarinIonic

Database

SQL ServerPostgreSQLMongoDBRedisFirebaseSupabase

DevOps

DockerKubernetesAzureAWSGCPCI/CD

Desktop

WPFWinFormsMAUI DesktopElectron

Platforms

TelegramDiscordSlackShopifyAmazon API

Let's build together

Tell us what you're building. We'll get back to you with a plan and a quote within a day.

Latest Articles

Technical Notes

Things I've learned from building software for 16+ years.

Let's Build Together

Tell us what you're building and we'll show you how we can help. No pitch deck needed.