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Duong B.
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Duong B.

Software Engineer

You can’t judge code, and you shouldn’t have to. Send me your idea and you get back a scoped feature list, a timeline, and a fixed price within 24 hours, before you spend anything Almost every founder who messages me is asking the same thing underneath: will anyone actually pay for this. A deck won’t answer that. Neither will a prototype people click through politely and then forget about. What answers it is a working product with a payment button and real users on the other side of it I build that alone. Web apps, mobile apps, internal tools, AI features, automation, QA, and whatever infrastructure holds the thing up. You talk to me, not an account manager. When something breaks there is nobody for me to hand it to The front end is usually React, Next.js, TypeScript or Svelte, with FlutterFlow, Lovable or WeWeb when speed matters more than control. Behind it: Hono, NestJS, Node, Bun, Xano, Postgres, Supabase, Cloudflare D1, Neon or any tech that you prefer. The AI work is the part founders expect back as a demo. Chat, document analysis, internal copilots, workflows that store data and remember who the user is, on OpenAI, Claude or Gemini. I ship that into production, not into a video Any studio can hand you something in three weeks. Month four is the real test, when you have paying users and the product has to be extended instead of rewritten. So you get docs and a codebase your next developer can read. Not a black box with my name on it Most of my work is legal tech and B2B SaaS, with some proptech, healthcare and AI tools. Recent builds: a multi-tenant AI legal document platform, a construction workforce marketplace with job matching and payments, a property management system Founders usually arrive wanting a clickable MVP to test demand, a revenue-ready product without hiring three teams, or a prototype that runs on their laptop and nowhere else Send me your idea. Scope, timeline and price come back within 24 hours, and you decide from there

🇻🇳Ho Chi Minh City, Vietnam$30/hr100% JSS4.87 (5)Since Dec 2021
MRR
$2,567
🌍#16.1K/363K
🇻🇳#132/2,975
Recent Earnings
$15,402
🌍#16.1K/363K
🇻🇳#132/2,975
Total Earnings
$39,673
🌍#85.3K/363K
🇻🇳#580/2,975
Avg. Per Project
$2,204
🌍#66.3K/363K
🇻🇳#454/2,975
Recent Projects
7
5f3h
🌍#132K/363K
🇻🇳#1,078/2,975
Total Projects
18
10f14h
🌍#132K/363K
🇻🇳#1,078/2,975
MRR Performance Over Time
$50k$25k$0
6 mo ago3 mo agoNow
Coming SoonGathering historical data
World Skill Rankings
of 55
#4
WeWebTop 5%
#8Vibe
#10Web Crawler
#29Cloudflare
#45Web API
#120Golang
#127Database Design
#458n8n
#477SaaS
#494API Development
#517API
#831Automation
#911AI Agent Development
#2,433JavaScript
🇻🇳Vietnam Skill Rankings
of 7
#1
Web CrawlerTop <0.01%
#1Web API
#1Database Design
#1WeWeb
#1Vibe
#2n8n
#2Cloudflare
#3SaaS
#3Golang
#5API Development
#5Automation
#5API
#10AI Agent Development
#27JavaScript
Duong B. — Top 4% in Vietnam | UpworkMRR