Minh H.

- Top 1% on Upwork this year · Top Rated Plus · 100% JSS · 5.0★ - Flexible, accountable, and I usually reply within a few hours I build AI-powered SaaS products from blank page to production, as a solo engineer or technical lead. Founders hire me when they want the architecture, the product and the AI layer owned by one accountable person. Technical Lead at a Finnish AI coaching startup and engineer at a Singapore AI platform used by AXA, Grab and major banks, insurers and telcos. 8+ years, 30+ production systems, across healthcare, real estate, fleet management and e-learning. ⭐ THE SHORT VERSION - A clinical platform that went into an FDA 510(k) submission, matching the lab's original MATLAB engine to 98.5% across 201 compounds - A US real-estate SaaS that takes homeowners from listing to closing without an agent - An LLM coaching layer in production, fed by Garmin, Suunto, Oura, Whoop, Apple Health and Google Health data - Real-time AI sessions on WebSockets and Redis for an enterprise platform with SOC 2 grade privacy controls ⭐ WHY CLIENTS HIRE ME I build AI products, not apps with AI bolted on. + I run LLM systems in production: prompt orchestration, streaming chat, RAG with vector search, document extraction and structured outputs. That includes the parts most people skip: fallbacks when the model is wrong, cost control, and keeping AI output visibly separate from verified data. I ship fast without shipping fragile. + I work daily with Claude Code, Codex and Cursor, and I review every line. I don't ship code I couldn't defend to a reviewer. Speed and quality aren't a trade-off when you know where AI is unreliable. I take real ownership. + I tell you early when a plan is wrong, give a recommendation instead of a menu, and explain trade-offs in plain English. I write decisions down so the system stays understandable after I'm gone. 🤝 HOW WE WORK TOGETHER - First week: I read your brief or codebase and send a written plan with the risks and a small first milestone, before you commit real budget - Flexible hours: I'm in Vietnam (GMT+7) and adapt to your schedule, including overlap with US and European hours for calls and urgent work - Fast replies: usually within a few hours, and faster when something is broken in production, weekends included - Updates: short written progress notes every day or two, and a demo at each milestone - Your accounts, your code: repo, hosting and database live under your name from day one 🛠️ WHAT I DELIVER - MVPs and full SaaS platforms, solo or leading a small team - AI features: LLM integrations, RAG, document processing, assistants, automation - Takeovers of AI-built apps (Lovable, Cursor, Replit): security audit, Supabase row-level security, production hardening - System design: data modeling, REST APIs, microservices, multi-tenant architecture - Dashboards, admin panels and approval workflows - Payments, health data, accounting, messaging and calendar integrations 📌 SELECTED WORK - AI Coaching Platform (Finland), Technical Lead. Web, Flutter mobile and Node/Go services. I own architecture, APIs, database evolution, four-tier role-based access, subscription billing and the AI conversation layer. - Enterprise AI Platform (Singapore), used by AXA, Grab and major banks, insurers and telcos. Real-time AI sessions, Anthropic and OpenAI integration, privacy hardening to SOC 2 standard. - Clinical Diagnostics Platform. Validated Python rebuild of a lab's MATLAB scoring engine, with QC gating, audit trails and 21 CFR Part 11 e-signatures. - Real-Estate SaaS (US), built solo. Seller dashboard, MLS integration, AI PDF parsing that extracts offer terms and flags deadlines and risks, Stripe, two-way SMS/email, e-signed disclosures. Multi-tenant with Postgres row-level security. - Fleet Management Platform (Australia). Service scheduling, inspections, inventory, Xero invoicing and Stripe, later a white-label multi-tenant product. Also: legal SaaS with per-seat billing, email-marketing analytics, and enterprise e-learning dashboards. 💻 STACK TypeScript, JavaScript, Go, Python, Dart | React, Next.js, Vue, Tailwind | Flutter | Node.js, NestJS, Fastify, FastAPI | PostgreSQL, Supabase, MongoDB, Prisma, Redis, pgvector | OpenAI, Anthropic, RAG, n8n | AWS, Vercel, Render, Docker, GitHub Actions | Stripe, PayPal, Paddle, Lemon Squeezy | Jest, Vitest, Playwright, Sentry 🎯 A GOOD FIT IF You want one senior person to own a product, add a serious AI feature, finish an AI-built app before launch, or rescue a project that stalled. Probably not a fit if you need a template site or the lowest price is the main criterion. 💬 LET'S TALK Send me three things: what you're building, who it's for, and when you need it. I'll reply quickly with an honest read on whether I'm the right fit and how I'd approach it.