zfdang · dantifer

Zhengfa DANG

Software Engineer · Open Source Contributor · Tsinghua Alum

I build apps that are used by thousands of people daily — from macOS menu bar utilities to Android clients and chess learning tools. Focused on clean code, thoughtful UX, and open collaboration.

Background & Skills

Engineering leader with 16+ years across online video advertising, SaaS, and cloud platforms — including 12+ years leading teams from startup through scale-up.

Currently Head of Engineering at an early-stage startup, building a trusted deployment platform for AI agents that combines TEE and blockchain to make agent execution traceable, verifiable, and auditable.

Previously grew with a leading online video ad-tech company from Engineering Manager to VP of Engineering over 16 years — leading AWS migration, SSP/ADX modernization, and high-scale ad-delivery platforms.

M.S. in Computer Science from Tsinghua University (NLP / AI Lab).

AI Agents TEE / Blockchain Engineering Leadership AI-native Engineering Distributed Systems Cloud / AWS SaaS / B2B

GitHub Activity

A snapshot of public contributions and languages on github.com/zfdang.

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Projects

Open-source apps built and maintained over the years.

macOS Swift Open Source

Chinese Lunar Calendar for Mac

Mac 状态栏万年历

A lightweight macOS menu-bar app that displays a full lunar calendar with traditional Chinese holidays and supports custom personal festivals. Includes keyboard navigation, holiday override updates, and compatibility from OS X 10.8 onwards.

从状态栏快速弹出含农历及节日的万年历,支持国内假期调整与在线更新,可添加个人农历/公历节日,支持键盘控制。

calendar.zfdang.com
Android Java Open Source

zSMTH — Android Client for NewSMTH

水木社区 BBS 开源 Android 客户端

A clean, ad-free Android client for NewSMTH (Tsinghua BBS). Features rich-text post rendering with inline GIFs, full-screen image viewer with EXIF info, Like display, IP geolocation, push notifications for replies and mentions, and board search with partial Chinese matching.

无广告、开源的水木社区客户端。支持图文混排、GIF 动画、图片 Exif、IP 来源、消息提醒、版面快速搜索及分享到微信/微博。

zsmth.zfdang.com
Android Accessibility Open Source

Android Touch Helper

开屏跳过 — 自动跳过开屏广告

An Android accessibility service that automatically skips splash-screen ads across apps. Supports three detection strategies: keyword matching, target widget lookup, and coordinate-based tap — configurable per app with no root required.

基于 Android 无障碍服务,自动跳过应用开屏广告。支持关键字、控件 ID、坐标三种跳过策略,免 root,可按应用配置。

touchhelper.zfdang.com
Android C++ AI Engine

象棋鱼 — Chess Fish

开源免费的安卓版象棋学习工具

A free, open-source Chinese Chess (Xiangqi) learning app for Android, powered by the Pikafish engine. Features move history display, legal move highlighting, engine-assisted move suggestions with one-tap selection, evaluation curves, and built-in XQF game library.

使用皮卡鱼象棋引擎,提供走法提示、局势评估曲线、变着可视化和内置棋谱(XQF 格式),是强大的象棋学习和分析工具。

fish.zfdang.com

From the Blog

blog.zfdang.com

Personal writing on software engineering, Android development, macOS hacking, open-source tooling, and occasional notes from the chess board.

Android Dev macOS Open Source Chess / 象棋 Tech Notes
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