Zaizhuang Cheng

Full stack product engineer

I'm Zaizhuang, CTO and co-founder at Spin in San Francisco.

I've led consumer engineering teams, been an engineering manager leading 14 engineers on an enterprise web application, and the 1st engineer at a B2B startup.


Past Work


Led the consumer engineering team, responsible for the embedded Disqus comments and admin dashboard for moderators.

React.js, Backbone, Python, Django.

Go to Disqus

My attempt to optimize the way we collect digital content. Started in Oct 2014 with Derrick.

Ruby on Rails, Postgres, AWS, Backbone.js, Handlebars, design.

Go to


Helps you manage your brand's Instagram hashtags. Started in June 2013, currently not maintained.

Ruby on Rails, MySql, Heroku, unicorn, Instagram API, design.


1st engineer at Singapore based online customer referral startup.

Ruby on Rails, MySql, Amazon AWS, nginx, TDD, Jenkins CI, rspec, web design, sales.

Go to ReferralCandy

Singapore based food review startup. Became the 2nd biggest F&B website.

Started in PHP, migrated to Ruby on Rails. MySql, TDD, rspec, Solr, Heroku, web design, product management.

Go to

Networking over drinks with awesome people.

Ruby on Rails, MySql, nginx, TDD, Heroku, rspec, web design, marketing, operations, product management.

Go to Bartop

startuproots singapore


Internships for top students for top Singapore startups.

Started 1st international chapter of StartupRoots in Singapore, which took the local scene by storm.

Go to StartupRoots



I accepted a scholarship to study in USA and enrolled in Purdue's School of Electrical & Computer Engineering in Fall 2003. In Spring 2006, I graduated top of my class with a near perfect GPA of 3.96 and a Bachelor of Science in Electrical Engineering (Highest Distinction).

I moved on to Stanford to do a Masters of Science in Management Science & Engineering from Fall 2006 - Spring 2007. It was this year at Stanford that got me addicted to entrepreneurship.

I spent the next 6 years working in Singapore, and moved to San Francisco in October 2013, where I currently live and work.


Say Hi

You can reach me at or message me via LinkedIn.