SoftwareDesigner& Developer

Building clean, high-impact digital experiences that tell a story.
Based in San Francisco, available worldwide.

View My Resume
The Story

About
Me

I'm Doris (Ying Ying) Cheng. A designer and developer who loves to discover the perfect harmony of color and space that makes a digital product feel alive.

I specialize in building web applications using the modern stack to let the core message shine.

I'm obsessed with the way humans interact with digital spaces.

Skills.tsx

JavaScript
TypeScript
Python
React
Next
Node
PostgreSQL
Docker
Tailwind

Projects

Projects.tsx

Foodie Diary
Foodie Diary
AI Calorie Tracker
ReactTypeScriptGemini APIVercel Serverless

Snap a photo of your meal and Gemini Vision estimates protein, fat, and carbs automatically. Includes a calorie-ring dashboard, macro goal setting, and a calendar view of your eating history.

WebsiteGitHub
Y2K Flying Banana
Y2K Flying Banana
Retro 3D AI Playground
Next.jsTypeScriptThree.jsOpenAI API

A Windows 98-style universe with a multilingual GPT chatbot, a spinning low-poly 3D hero built in React Three Fiber, a playable Snake game with 8-bit sound, and a built-in music player.

WebsiteGitHub
NextStep AI
NextStep AI
AI Interview Prep Platform
ReactExpressMongoDBGemini APIDocker

Full-stack interview coach that generates role-specific questions and AI-guided feedback with Gemini. Dockerized MERN stack, deployed on an IBM LinuxONE VM.

DemoGitHub
MBTI Personality Test
MBTI Personality Test
Full-Stack Personality Test
ReactNode.jsExpressMySQLJWT

Take the 16-type MBTI test with per-dimension scoring, then revisit past results in a personal dashboard. Features JWT authentication and MySQL-backed result history.

WebsiteGitHub