FOUNDER. ENGINEER. INVESTOR.

Partner at defy

Technical founders. Enduring companies.

I back technical founders building enduring software and AI companies.

Two-time founder. Former engineer and engineering leader.

Amy Yin

Technical founders

Builders solving hard problems with conviction.

Pre-seed to Series A

Early conviction and long-term partnership.

AI first- and second-order effects

Data, AI picks and shovels, robotics, voice apps, AI infra, and products helping companies become AI-native.

The operator path behind my investing.

Harvard

Founded Harvard Women in Computer Science.

Facebook / Internet.org

Bringing internet to the next billion people.

Coinbase

Engineer and engineering leader through hypergrowth.

OfficeTogether

Founder and CEO. Acquired by Envoy.

defy

Partner. Building and backing the best founders.

From Wisconsin to startups to venture.

How I got here.

Roots

My parents immigrated from China, and I grew up in Onalaska, Wisconsin, where I learned hard work and endurance.

I discovered coding at Harvard and fell in love with the ability to execute on my ideas at scale.

Builder

I wrote code that reached millions at Facebook and Coinbase during periods of hyperscale.

I founded two companies. defy led the seed for OfficeTogether, which was acquired by Envoy.

Why I invest

I invest in technical founders because I know the mindset: take the half-baked idea, make the crazy bet, and build the thing that others think is impossible.

amy@defy.vc

Partner at defy