Engineer at Meta

I make machine intelligence dependable.

I’m Duo Wang, an engineer with an applied-math foundation. I work across GPU training, real-time ads serving, data infrastructure, and payments.

01 / Trajectory

A career shaped by the hardest constraint.

The domain has changed—from computational geometry to real-time systems, data platforms, payments, and AI infrastructure. The thread is constant: understand the constraint and improve the system around it.

2007 — 2012

Mathematics & HPC

Stony Brook Ph.D. and Los Alamos research: numerical methods, computational geometry, and parallel algorithms.

2012 — 2015

Real-time systems

AppNexus and Manage.com: bidding algorithms, rare-event ML, and low-latency systems under live traffic.

2015 — 2022

ML & data platforms

Netflix and Opendoor: experimentation, optimization, serving abstractions, and shared compute infrastructure.

2022 — 2023

Global systems

Stripe: routing and cost-efficiency strategy across large-scale payment infrastructure.

2023 — Now

AI infrastructure

Engineer at Meta.

02 / Selected builds

A few things I build.