A1 Driving License Practice Test
Free study-and-test app for the Vietnamese A1 motorcycle license — 200+ questions, real-exam simulation.
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AI-assisted proposal tool that helps freelancers and SMBs close deals faster.
B2 Driving License Theory
Free study-and-test app for the Vietnamese B2 car license — 600 latest questions, real-exam simulation.
CalorAI: AI Calorie Tracking
AI-powered calorie tracking — snap a photo, let the model identify the meal and crunch nutrition instantly.
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Build, train, and deploy AI chatbots for messaging apps — round-the-clock customer support.
Book Summary | BookBriefs
Quick Insights from Books
What I can help with
Web Development
Modern, SEO-friendly, performant websites. Speed and experience first.
Android Apps
Native Android with Kotlin / Jetpack Compose. Smooth, stable, beautiful at every size.
iOS Apps
iOS apps that honor Apple's Human Interface Guidelines — refined and reliable.
AI Agents & Automation
Chatbots, multi-step agents, RAG, n8n workflows. Real automation, not a demo.
A 5-step process
Listen & discover
Understand the problem, the users, the business goals — before talking solutions.
Scope & quote
Clear deliverables, realistic timeline, transparent pricing.
Design
Wireframe → hi-fi UI → prototype. You see the product before a line of code.
Build & test
Ship in small increments, demo weekly. No last-minute surprises.
Launch & support
Full docs, 12-month warranty, long-term operational support.
What clients say
“Thien gets the product fast and proposes directions we hadn't considered. We launched ahead of schedule and stayed stable from day one.”
“Scaled to 50K+ users with almost no re-tuning. The kind of developer every team wishes they had.”
“He doesn't just code — he designs experiences. Online bookings doubled after the new site went live.”