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arun rao

i co-lead a large team of research engineers working on ML recommenders and ranking models at Meta CoreML; we serve 2.7bn people.

i spend my time thinking about real-world applications of ML, crypto, internet protocols, APIs, contemporary art, and design.

i write the Substack letter Hash Collision, where i report on developments in science, tech, culture, economics, and ethics. i co-wrote “A History of Silicon Valley, 2nd Ed.“

in the past, i led an applications and platform machine learning team at Amazon Music in San Francisco. prior to that, i was a co-founder of Starbutter AI (Skydeck F17) and a quant debt and derivatives trader at PIMCO.

i’m a grad of UCLA, Penn/Wharton, and the Indiana Academy.

i like books, running, yoga, math, grammar and style, dead ancient languages, modern computer languages, black hole physics, bears, and pad see-ew.