From the API to the org chart
Jack Chu
CTO / VP
of Engineering
累計４億ＤＬ突破！
- 01 fête · CTO
- 02 Legacy · VP of Technology
- 03 Modern Age · CTO
- 04 Away · VP of Engineering
- 05 Bonobos · Director of Engineering
- B1 Retriable
- B2 Code Review Bench
Manufactured in Brooklyn, NY Kam Music
Liner Notes
朱丹成 Jack Chu
I lead engineering teams at startups, and I still architect and code, these days more with AI agents.
My passion is building amazing teams that build just as amazing digital products. My background in software engineering started in web based backend APIs and then later expanded to web frontend expertise and systems architecture.
Later, I found that building teams and leadership was even more fun and challenging, but also let me scale up my ability to impact the product and the business.
Jack Chu, Brooklyn, NY
Outside of work
- Guitar
- Electric, through a mix of new and old effects pedals, plus modeling and capture gear
- Keyboards
- Mechanical, built and modded
- Kitchen
- Cooking
- Heavy rotation
- Japanese rock and pop
Now
Updated November 2026
- Between roles and looking for my next one.
- Experimenting with agentic AI, including a self-hosted Rakazo setup (a private, local Grokbot) to try AI as more of a personal assistant.
- Writing my own agent skills, and trying skills from Matt Pocock and poteto for a better agentic workflow.
- Working on Code Review Bench, looking for better ways to do agentic code review.
Tracklist
Startup engineering leader. I build engineering organizations, with product and design alongside, and ship the product while doing it. CTO or VP at four companies over the last eight years. I still architect and code, these days more with AI agents. Mostly e-commerce and omnichannel retail, more recently health and wellness.
fête CTO
Nov 2025 - May 2026 Early-stage AI gifting startup, built AI-first with a team of 6.
Legacy VP of Technology
Jan 2024 - June 2025 At-home fertility, sperm testing and freezing.
Modern Age CTO
Sep 2021 - Dec 2022 Longevity and aging wellness clinics in NYC; built the tech org from zero to 21.
Away VP of Engineering
Oct 2018 - Mar 2021 DTC luggage brand; grew my tech team from 3 to 30+.
Bonobos Director of Engineering
Jan 2015 - Oct 2018 Men's apparel brand, acquired by Walmart in 2017.
Bonus tracks
Retriable Open source · Ruby gem
Feb 2012 - Present A simple DSL to retry failed code blocks with randomized exponential backoff, over 419 million downloads on RubyGems.
Code Review Bench Open source · Benchmark
Sep 2026 - Present An open benchmark comparing LLM code review setups on real open-source pull requests, measuring findings, cost and false alarms.
Running times in years:months.
Education
Baruch College Computer Information Systems (CIS) BBA 2004-2007
Credits
Contact
- jack@jackchu.com
- GitHub
- github.com/kamui
- linkedin.com/in/jack-chu
- Resume
- jackchu.com/resume/pdf (PDF)
Artwork & sound
- Cover photo
- Veronica Grijalva
- Music
- “After Morning” by Naoya Sakamata, licensed CC BY 3.0
- Typefaces
- Ostrich Sans, Archivo, Barlow, Barlow Condensed, Barlow Semi Condensed, Noto Sans JP and Kaisei Decol
© Jack Chu. All rights reserved. CHU-5678