01Live web product
Read case study Web + applied AI
D8ly
A live bilingual Bazi web app where deterministic calculations establish the foundation and applied AI turns the result into a useful narrative.
Open d8ly.app Web & applied AI engineer · Bay Area
I build ideas
people can feel.
I design and engineer web products with React, Next.js, TypeScript, Cloudflare, and applied AI—turning complex systems into clear, responsive experiences.
human-interface.tsx
Craft + code
Applied AI
Hover the portraitAnalog human / digital mind
01 — Selected work
A few things
I've made.
Small products, playful prototypes, and useful systems. Each one started with a real question—not a need to look like a finished startup.
Read case study 02Live experiment
Read case study Realtime creative systems
Agents Rap Battle
A live realtime performance experiment: two persona-driven performers share context, stream verses, and react to a beat-aware browser experience.
Open live experiment03Active development
AfterPlayNative media systems
Read case study Native product engineering
AfterPlay
A native media product in active development, exploring durable background uploads and playback workflows across SwiftUI and Cloudflare.
In the edit
New screen captures and short interaction reels are the next layer—not more marketing copy.
02 — How I think
Make it clear.
Then make it shine.
My front-end background still shapes everything: care about the person at the other end, sweat the interaction, and never let complexity leak into the experience.
01
Design the feeling
Interfaces should communicate before anyone reads the documentation. I start with hierarchy, rhythm, and the moment that makes a product memorable.
02
Engineer the system
The polish only lasts when the code underneath is clear, responsive, and ready to evolve. Craft and maintainability belong in the same conversation.
03
Explore the edge
AI is changing what a small team can make. I prototype with it, pressure-test the experience, and keep the useful parts grounded in real human needs.
03 — Working set
The stack got wider.The standard stayed high.
Recent work leads with responsive web products and applied AI, supported by cloud and data systems plus native media experiments. The through-line is still thoughtful product craft.
01
Frontend + product UI
Front-end craft with a point of view.
Responsive product surfaces, motion systems, and the design details that make complex tools feel immediately usable.
- JavaScript
- TypeScript
- React
- Vue.js
- Next.js
- HTML + CSS
- Tailwind CSS
- Framer Motion
- Vite
02
Applied AI + agents
Models inside real workflows.
Structured generation, model evaluation, and persona-driven agent experiments grounded in useful product feedback.
- Gemini
- OpenAI
- Ollama
- Agent Evaluation
- Tool Allowlists
- Schema-validated AI
03
Cloud + data
Small systems that hold up.
Serverless APIs, auth, databases, object storage, and resilient upload paths built for products in the real world.
- Cloudflare Workers
- R2 + D1
- Supabase
- PostgreSQL
- Prisma
04
Native + media
Supporting work, in development.
SwiftUI, AVFoundation, background tasks, and device APIs are part of the engineering practice; release preparation is still underway.
- Swift
- SwiftUI
- React Native
- Expo
- Capacitor
Shipping practice
Release work is part of the product—not the last checkbox.
- Claude Code
- Codex + Cursor
- Git + GitHub
- VS Code + Jest
- Release preparation + QA
- Apple Sign In + DeviceCheck
- Multipart media uploads
- Offline recovery queues
- Vercel + Wrangler
04 — Start something
Have an idea
with some voltage?
I'm interested in thoughtful teams, unusual products, ambitious prototypes, and conversations that lead somewhere unexpected.
davidhsiao510@icloud.comSend a signalUsually reads like a human