You will get a modern React or Next.js web application with TypeScript
Project details
You'll get a professionally built React or Next.js web application that's fast, responsive, and production-ready.
With 6+ years of development experience, I build high-performance web applications that deliver measurable results. My projects have served 16,000+ users with sub-second response times and 90+ Lighthouse performance scores.
Recent work includes:
• Database platform handling 10,000+ daily queries with real-time search
• Enterprise admin dashboards with role-based access control
• Business management platforms with real-time data sync
• SEO-optimized sites achieving 90+ Lighthouse scores
What sets me apart:
• Clean, maintainable TypeScript code following best practices
• Performance-first approach (caching, lazy loading, CDN)
• Responsive design that works flawlessly on all devices
• Clear communication with regular progress updates
• On-time delivery with thorough quality assurance
Tech Stack: Next.js 15, React 19, TypeScript, Tailwind CSS, Supabase, PostgreSQL, Cloudflare R2.
Every project includes source code, documentation, and deployment support.
With 6+ years of development experience, I build high-performance web applications that deliver measurable results. My projects have served 16,000+ users with sub-second response times and 90+ Lighthouse performance scores.
Recent work includes:
• Database platform handling 10,000+ daily queries with real-time search
• Enterprise admin dashboards with role-based access control
• Business management platforms with real-time data sync
• SEO-optimized sites achieving 90+ Lighthouse scores
What sets me apart:
• Clean, maintainable TypeScript code following best practices
• Performance-first approach (caching, lazy loading, CDN)
• Responsive design that works flawlessly on all devices
• Clear communication with regular progress updates
• On-time delivery with thorough quality assurance
Tech Stack: Next.js 15, React 19, TypeScript, Tailwind CSS, Supabase, PostgreSQL, Cloudflare R2.
Every project includes source code, documentation, and deployment support.
Programming Languages
HTML & CSS, JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, DesignWhat's included
| Service Tiers |
Starter
$150
|
Standard
$500
|
Advanced
$1,500
|
|---|---|---|---|
| Delivery Time | 5 days | 10 days | 14 days |
Number of Revisions | 2 | 3 | Unlimited |
Number of Pages | 3 | 7 | 15 |
Design Customization | - | ||
Content Upload | - | ||
Responsive Design | |||
Source Code |
Frequently asked questions
About Chih-Cheng
AI Full-Stack Developer | RAG Agents, Next.js SaaS | 20K+ User App
Chiayi City, Taiwan - 4:11 pm local time
What sets me apart:
→ Production AI Agent Platform: Built a multi-tenant AI customer support SaaS where AI agents autonomously use 4 custom tools — order lookup, inventory check, support ticket creation, and knowledge base search. Features a RAG pipeline with pgvector embeddings, Stripe checkout with webhook billing, and an embeddable chat widget deployable on any website via a single script tag. Built with Next.js 16 and Vercel AI SDK v6.
→ RAG Pipeline Engineering: Designed and shipped a complete Retrieval-Augmented Generation system with three-provider LLM switching (Gemini, OpenAI, Claude), a document processing pipeline (PDF/TXT/MD upload, intelligent chunking, embedding, pgvector similarity search, source-cited answers), and SSE token streaming.
→ 20K+ Real Users at $0 Cost: My ChronoStory game data platform serves 20,000+ active users with 3.9M+ data interactions and 26-minute average sessions. A 4-layer caching strategy (localStorage + SWR + ISR + Cloudflare R2 CDN) reduced monthly hosting from $65 to $0 while generating steady ad revenue.
→ Enterprise Full-Stack Architecture: Built an 84K+ LOC e-commerce platform on a Turborepo monorepo — Next.js 15 storefront, Vite 7 admin dashboard, and NestJS 11 backend API — with ECPay payment integration and a 4-tier membership system.
→ Real-Time Collaboration: Built a Kanban board with GraphQL subscriptions, WebSocket-driven live presence, optimistic drag-and-drop with 5s undo, and Redis-backed JWT rotation. Includes DataLoaders for N+1 prevention and a BullMQ email queue.
How I work:
• Clear communication — plain-English progress updates you can act on, no jargon walls
• Production mindset — type safety, tests, and deployment-ready configuration are part of every delivery, not extras
• Honest scoping — if there is a simpler or cheaper way to reach your goal, I will tell you before we start
Ready to build? Send me a message with a short description of what you need, and I will reply with a concrete plan, timeline, and fixed quote within 24 hours.
Steps for completing your project
After purchasing the project, send requirements so Chih-Cheng can start the project.
Delivery time starts when Chih-Cheng receives requirements from you.
Chih-Cheng works on your project following the steps below.
Revisions may occur after the delivery date.
Discovery & Planning
Review requirements, discuss project scope, and create a detailed implementation plan with timeline.
Design & Development
Build frontend UI, implement backend logic, integrate APIs, and set up database structure.