Andy Deng

Andy Deng

I'm a software engineer from New York, NY. I move quickly, take ownership seriously, and care deeply about product quality.

Software Engineer with 2+ years of experience building products from 0 to 1. Currently working on AI-powered development tools at Pega, where I own features end-to-end across the React frontend and Java backend. Recently won Pega's annual hackathon across 225+ participants.

I'm a builder at heart. I thrive in fast-paced environments where I can take ownership and ship work that matters. On the side, I build projects across developer tooling and web applications -- including sigdiff, an open source npm package for semantic code diffing, and Leafpad, a developer tools suite with 1,200+ monthly users.

andydeng0224@gmail.com

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Open Sourcesigdiff
AI-Powered Outbound
RemesRemes

May 2025 – Present

  • Led full-stack performance overhaul of Blueprint, cutting initial load time from 6s to 1.5s through frontend rendering optimizations and backend API refactoring
  • Built LLM orchestration layer handling 1M+ blueprints, with structured outputs, schema validation, retries, and fallback to ensure reliable production behavior

Languages

PythonJavaScript/TypeScriptRubyJavaSQL

Frameworks

Next.jsReactRailsDjango

Tools

GitDockerLinearJira

Databases

PostgreSQLRedis

Testing

RSpecPlaywrightPytestJest

Cloud Services

AWSVercelFirebase
Boston College logo

Boston College

B.A. Computer Science|2024

Freelance

Ooey

B
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128 words·12 lines·1 min read
Developer Tools
LeafpadLeafpad
AI Video Generator
r/Shortsr/Shorts
event-loop.js
Call Stack
log()
resolve()
main()
Microtask
.then(fn)
.catch(e)
Macrotask
setTimeout
setInterval
1 console.log("start")
2 setTimeout(cb, 0)
3 Promise.resolve()
4 .then(fn)
Project

QuFlow

Let's work together

Open to new opportunities and collaborations.

Made by Andy Deng / Source