Engineer · Builder · Founder

I build software for the real world.

From helping people open doors to new places, to transforming the machinery of government.

I've been starting a company.

GovMaxxing is where I'm expanding my modernization work on systems that power the federal government.Visit GovMaxxing🇺🇸 GovMaxxing operates federally as Yat Choi LLC.

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Selected work / 02

04 projects

From consumer products to federal systems.

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U.S. Office of Personnel Management / DOGE / National Design Studio · Modernization Lead

Modernization of Federal Retirements

Turning a decades-old paper process into a modern, digital experience. Processing times went from 7 months to 7 seconds

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Airbnb · Project Founding Engineer

Airbnb Smart Locks

Taking secure guest access from an R&D prototype to a production system serving hundreds of thousands of Airbnb guests, supporting a critical real-world moment in the Airbnb journey: first-time entry.

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Airbnb · Launch Engineer

Airbnb Experiences

Helped launch Airbnb’s second line of business, bringing a founder-led product vision to life through booking, itinerary, and travel assistant features for Airbnb Experiences.

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Airbnb / Samara · Research Engineer

Samara R&D

Explored new product futures inside a design-led innovation studio, prototyping with augmented reality, computer vision, and machine learning.

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Writing / 03

Notes from inside the work.

Dec 2025

How We Automated Federal Retirements

National Design Studio / Dev Index

Next / 04

Have a hard problem that needs solving?

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Based in the U.S. / New York City · Washington DC