Building fun things
people love to use.

Hi, I'm siyuan. An iOS engineer with a passion for AI. I build polished, user-first mobile experiences and explore the intersection of vibe coding and everyday AI tools.

iOS Development

Swift SwiftUI UIKit RxSwift Concurrency StoreKit VisionKit Core Data CloudKit

Architecture & Tooling

TCA Redux MVVM Clean Architecture Modular Architecture Instruments Fastlane CI/CD

AI & Workflow

Claude Code Cursor Codex ChatGPT Gemini MCP Skills Ollama Prompt Engineering

Design & Creative

Figma Sketch Photoshop SAI Procreate Stable Diffusion ComfyUI Midjourney Kling

About Me

I've spent years crafting mobile apps — from indie side projects to enterprise-scale products. I believe in writing clean code, obsessing over details, and building things that genuinely make life easier.

Work Experience

Creator & Builder

Indie Creator

Crafting apps, tools, and creative workflows powered by AI. Exploring generative art, shipping indie products, and making interesting things happen.

Cybozu, Inc.

iOS Engineer

Developing and maintaining iOS applications for enterprise collaboration tools used by thousands of businesses.

teamLab, Inc.

iOS Engineer

Built iOS applications at a digital creative company known for blending technology with art and innovation. Led the development of multiple large-scale commercial apps.

Indie Projects

SUBCAN

iOS

Subscription & Fixed Cost Manager

Track subscriptions, get notified before billing dates, and take control of recurring expenses. Built with Swift and SwiftUI.

PPCleaner

macOS

Provisioning Profile Manager

A free macOS utility for Apple developers to manage provisioning profiles — check expiration dates, verify validity, and inspect metadata with ease.

SnatchCat

iOS

Video Organizer for X (Twitter)

A simple tool to collect, organize, and play videos from X posts. Fully local storage, built-in player, and completely ad-free.

Work Projects

Enterprise SaaS

Enterprise Collaboration Platform

iOS

A large-scale SaaS product for business teams to manage schedules, messaging, and workflows across organizations.

Industry Solutions

Music & Live Streaming App

iOS

A fan-facing platform with live streaming, DRM-protected media playback, in-app purchases, and interactive content.

Restaurant Chain App

iOS

A nationwide food ordering and loyalty app serving millions of daily users across thousands of locations.

Airline Booking App

iOS

A flight booking and check-in app for an international low-cost carrier, covering reservations, boarding passes, and travel management.

Medical Logistics Platform

iOS

A B2B supply chain management app for the healthcare industry, handling inventory tracking and barcode scanning in clinical environments.

Building fun things people love to use.