Blogs / Personal blogs

I want to understand the world, in the broadest possible sense. I enjoy thinking about math, physical sciences, software engineering, economics, irreducibly complex systems, but also about classical music, aesthetics, and philosophy. I write.

Popular posts
8
Total points
1,735
HN comments
1,185
Rank
#1,013 personal

Visit moderndescartes.com → On Hacker News Jan 2017 – May 2026

AI & Machine Learning 4Software Engineering 3Science & Space 2Databases & Data 2Society, Policy & Culture 1Math & Algorithms 1

1

Why did Google Brain exist?

This essay was originally written in December 2022 as I pondered the future of my job. I sat on it because I wasn’t sure of the optics of posting such an essay while employed by Google Brain. But then Google made my decision easier by laying me off in January. My severance check cleared, and last week, Brain and…

2

For Want of a JOIN

Once upon a time, I was on a small team tasked with building a data pipeline. On this team was someone we’ll call Bob, who was fresh out of grad school and hadn’t had much experience with software engineering, and no experience with SQL. As part of this data pipeline, Bob had to combine the data from two tables. JOIN…

4

Learn perfect pitch in 15 years

It was not easy or quick, and there were so many qualifiers that, for over a decade, I didn’t really think I “deserved” the label. But as I got older, those qualifiers started dropping off one by one, and today I’m convinced that I have perfect pitch. I describe my musical journey and thoughts on what perfect pitch…

8

Expertise in the age of AI

Junior engineers are expensive, both in salary and seniors engineers’ time. This cost was partially recouped through code contributions, but today, it’s more effective to directly maximize the output of your senior engineers. The hiring market reflects this trend: senior engineers have an easy time finding jobs, while…