ybooks Read

Readers

Sebastian Barrios

Longtime head of product and engineering at Mercado Libre; SVP of engineering at Roblox when they spoke to Lenny's Podcast in 2025.

5 books on the record · 8 Jun 2025 – 8 Jun 2025

The bar next to each date shows how long ago it was said: 7d is days, 4yr is years.

recommends it

Beast Academy by Art of Problem Solving

Beast Academy for math is another great one that uh I I would recommend to uh to parents.

on a podcast · 8 Jun 2025 · Report

liked it

The Dream Machine by M. Mitchell Waldrop

another book that that I really like is called The Dream Machine. uh and it's kind of like the the the story of uh computers and computing

on a podcast · 8 Jun 2025 · Report

Everything Sebastian Barrios recommends — not just books — on rcmnd →

That little bar

It says how long ago something was said, so you can tell last month from 2014 without doing the arithmetic. Full and green is recent; it drains and cools as the date gets older, and empties completely at about 6 years.

A striped bar means the date itself is an estimate — the source did not carry an exact one. An entry with no date at all gets no bar.