于航

Jason Yu

Personal Profile

I previously worked at Tapatalk, Alibaba Local Services, and other internet companies. I am currently with PayPal Shanghai’s GFC (Global Financial Crimes) team, driving AI-powered financial compliance initiatives and overseeing the team’s technical direction.

In 2018, I published 深入浅出 WebAssembly, the first WASM technical book in China, followed by several online courses including 深入 C 语言与程序运行原理.

My technical expertise spans Node.js full-stack development, LLM application engineering, and AI-driven SDLC. I have been recognized as an Outstanding Speaker at major conferences such as GMTC and TLC, and I am experienced in cross-team collaboration and technical team leadership.

Work Experience

PayPal Holdings, inc.Full-time

2021.03 - Present Member Of Technical Staff 1 (MTS1)

2019.07 - 2021.02 Software Engineer 3

As the web R&D lead of the CIPDS-ERC team at PayPal Shanghai, I oversee web system design and development, team coordination, and delivery. Key responsibilities include:

  • End-to-end architecture design, development, and maintenance of web services.
  • Collaboration and development process control with international teams.
  • Agile-based project management (scrum master).
  • Team's technical culture building.

Multiple-time recipient of the company’s “Spot Award”. Tech stack: TypeScript, Next.js, Shadcn, Tailwind CSS, and other modern web technologies.

We execute the entire software SDLC in an AI-driven manner, integrating intelligent tooling (Claude, ChatGPT, etc) and automation throughout each phase of development.

Subsequently joined the GFC (Global Financial Crimes) team, spearheading AI-driven financial compliance initiatives. Built a comprehensive end-to-end AI SDLC pipeline leveraging OpenSpec and Claude Code/SDK; introduced the AG-UI protocol to enable agent-driven interaction and accelerate product innovation within compliance workflows.

Alibaba Local Service / Ele.meFull-time

April 2017 - June 2019 Senior Frontend Engineer

  • Led the front-end team maintaining multiple web projects under “饿了么 π”, primarily using Vue.js, Electron, and WeChat Mini Programs, with a focus on delivery tech and logistics innovations such as drones and smart delivery hubs.
  • After transferring to the “饿了么大前端” org, built the foundational web front-end architecture for the logistics platform and coordinated integration with other business units including Taobao, using React, Rax, and Weex.

Tapatalk Co., Ltd.Full-time

March 2015 - March 2017 Full-stack Engineer

I was primarily responsible for building the company’s web front-end and back-end infrastructure within the PHP ecosystem. My work covered the migration from the CakePHP framework to Laravel, API development based on the new architecture, scheduled and daemon script development, PC website implementation and performance optimization, SEO improvements, as well as the overall engineering design and development of the H5 website.

Key Tech Skills

  • TypeScript / JavaScript
  • React / Next.js / Node.js
  • LLM Application Development / Claude Agent SDK
  • MCP / AG-UI / Skills
  • AI SDLC Engineering

Other Skills

  • Prompt Engineering
  • Scrum-based Agile Project Management
  • Technical Team Leadership and Mentorship
  • Cross-functional Team Collaboration
  • Fluent English Communication

Education

East China University of Science and Technology

Information Engineering - Bachelor Degree

Public Speech

QCon

Oct 2017 WebAssembly 核心原理、应用与未来展望

GMTC (Global Mobile Technology Conference)

Apr 2019 WebAssembly — 技术变革，未来已来

Jun 2021 WebAssembly Annual Report - 2021

Publication

深入浅出 WebAssembly

Author Nov 2018 Paperback Book / China Machine Press

A comprehensive guide to WebAssembly covering its underlying design principles, toolchains, and future directions.

WebAssembly 入门课

Author Oct 2020 Online Course / Geektime

A 23-lesson course covering fundamental WebAssembly concepts and practices.

深入 C 语言和程序运行原理

Author Oct 2021 Online Course / Geektime

A 49-lesson course covering how C constructs map to x86-64 assembly, C standard library internals, performance optimization, and C program interaction with the OS at runtime.

Open Source Project

cgc C / Assembly

https://github.com/Becavalier/cgc

cgc is a garbage collector for C (experimental), based on Mark-and-Sweep algorithm.

cpplax C++

https://github.com/Becavalier/cpplax

cpplax is the implementation for the language Lax which includes a "tree-walking" interpreter, a byte code compiler, and the corresponding virtual machine.

twvm C++

https://github.com/Becavalier/twvm

An experimental WebAssembly virtual machine, it supports complete MVP standard.

brainfuck-jit-interpreter C++

https://github.com/Becavalier/brainfuck-jit-interpreter

A Brainfuck interpreter with a hand-crafted x86-64 JIT compiler.

(POC) Zero C++

https://github.com/Becavalier/Zero

A demo presented a way for frontend JavaScript source code encryption with the help of WebAssembly.

SHDB Shell

https://github.com/Becavalier/SHDB

A simple, lightweight static key-value pair DB for shell environment in UNIX-like systems.

Zoomage.js JavaScript

https://github.com/Becavalier/Zoomage.js

An open-source library for image zooming by gestures on web pages.