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Cosmo W. Q

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Progressive Loading: A Classic Pattern to Scale Modern AI

How a classic engineering pattern quietly powers modern AI systems

Dec 14, 2025

Progressive Loading: A Classic Pattern to Scale Modern AI

Dec 14, 2025

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Building a Fully Local LLM Voice Assistant: A Practical Architecture Guide

Why your next assistant might run entirely on your own hardware.

Dec 8, 2025

Building a Fully Local LLM Voice Assistant: A Practical Architecture Guide

Dec 8, 2025

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From Vibing to Engineering: A Case Study of Building a Character Chatbot

A case study on building a mini character chatbot with Codex, from architecture, lessons learned, and the moments where AI shines or fails

Nov 18, 2025

From Vibing to Engineering: A Case Study of Building a Character Chatbot

Nov 18, 2025

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To Lepton users around the world in more than 130 countries:

Apr 23, 2020

Apr 23, 2020

Facade Pattern

Facade pattern is used when a system is complex or difficult to understand because of the large number of interdependent classes or the…

May 20, 2019

Facade Pattern

May 20, 2019

Command Pattern

Command Pattern issues requests to objects without knowing about the operation being requested or the receiver of the request. It wraps a…

May 20, 2019

Command Pattern

May 20, 2019

Composite Pattern

Composite pattern describes that a group of objects (composite) is to be treated in the same way as a single instance of an object…

May 20, 2019

Composite Pattern

May 20, 2019

Iterator Pattern

The Iterator Pattern is used to get a way to access the elements of a collection object in sequential manner without any need to know its…

May 20, 2019

Iterator Pattern

May 20, 2019

Strategy Pattern

There are common situations when classes differ only in their behavior. For this cases is a good idea to isolate the algorithms in…

May 20, 2019

May 20, 2019

Singleton Pattern

Sometimes it’s important to have only one instance for a class. For example, in a system there should be only one window manager (or only…

May 20, 2019

May 20, 2019

Cosmo W. Q

Cosmo W. Q

I am an engineer at Airbnb with experience from product to core infrastructure. This is my personal blog. github.com/hackjutsu linkedin.com/in/cosmo-qiu

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