Hi, I'm

Weijia Fang

Engineer · Builder · Product Thinker

Build things that didn't exist before.

With a background in data science and product development, I design and build tools that are both functional and human-centered.

📍 Based in the Bay Area·USC MS Applied Data Science '25

View Work
Weijia Fang

USC '25 ✦

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What I've built

apps & more
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💄

GlowNote

iOS · TestFlight

A local-first beauty memory app for saving and reusing looks that work.

Capture, organize, and retrieve personally verified makeup looks — not just products. Built around look-based memory, AI-assisted tagging, barcode scanning, and seasonal color mapping.

What I owned

Product concept & 0-to-1 architectureAI-assisted look namingBarcode scanning & product DB integrationSeasonal color mapEnd-to-end iOS implementation

Tech Stacks

SwiftUIOpenAI APIVisionKitOpen Beauty Facts APILocalization (CN/EN)
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📱

MindPrints 屏踪

iOS · TestFlight

A local-first screenshot reflection app for recording your mental life and rediscovering inspiration.

Turns screenshots into a personal archive of attention, emotion, and inspiration — with OCR, AI-powered reflection, natural-language search, and resurfacing flows.

What I owned

Product concept & 0-to-1 architectureOCR pipeline & metadata extractionAI reflection & multi-turn chatPersona-based AI interactionNatural-language search & resurface design

Tech Stacks

SwiftUIOpenAI APIVision OCRWidgetKitMultimodal prompt engineering
View project →
Also: websites & tools →

About

Builder by instinct,
engineer by training.

I build digital products with a strong bias toward clarity, usefulness, and real-world fit. My background spans software engineering, AI integration, and interface design, and I'm especially drawn to products that feel thoughtful from both the inside and the outside.

What drives me is not just how something works, but why it deserves to exist. I care about building tools that are technically solid, emotionally intuitive, and shaped by a clear product point of view.

📱

iOS Development

Native apps built with SwiftUI and SwiftData, with an emphasis on intuitive flows, clean structure, and polished interaction details.

🤖

AI & LLM Integration

Practical AI features designed for real product use — including prompt systems, structured outputs, retrieval workflows, and human-centered experiences.

🌐

Full-Stack Web

End-to-end web products built with modern tools like React, Next.js, and TypeScript, with attention to maintainability and user-facing clarity.

🗺️

Product Thinking

I ask why before I ask how. Product sense built from owning projects end-to-end.

Tools & Technologies

Languages
PythonSQLSwiftTypeScriptR
AI & LLM
OpenAI APIAnthropic APIDeepSeek APIMultimodal promptingPyTorchTensorFlowXGBoost
iOS
SwiftUICombineVision OCRVisionKitPhotosUIWidgetKitAVFoundationUserNotifications
Web & Infra
Next.jsReactNode.jsTailwind CSSVercelAWSFirebasePostgreSQL
Data
PySparkTableauD3.jsPowerBI
Design
FigmaProcreate

Based in

San Francisco Bay Area

Education

USC — Applied Data Science

Currently

Building & exploring new opportunities