About
Lucas da Costa is founder and CEO of Briefer. He previously worked as a senior software engineer at Elastic and led engineering teams at an early-stage London startup. He has maintained open-source testing libraries including Chai.js and Sinon.js, authored "Testing JavaScript Applications" published by Manning, and spoken internationally on software engineering topics.
Lucas da Costa @thewizardlucas
> The Fathers of the field had been pretty confusing: John von Neumann speculated about computers and the human brain in analogies sufficiently wild to be worthy of a medieval thinker and Alan M. Turing thought about criteria to settle the question of whether Machines Can Think,
Jul 31, 2026 · ♥ 5
Lucas da Costa @thewizardlucas
SO SELVEDGE IS A CORRUPTION FOR “SELF FINISHED EDGE”???? this guy’s tweets are bangers, every single one of them https://t.co/3b8iz5GEGA
Jul 30, 2026 · ♥ 1
Lucas da Costa @thewizardlucas
.@rtfeldman absolutely nailed it on his latest talk https://t.co/hSgSWbwDgU https://t.co/xkqwwj2Ppv
Jul 29, 2026 · ♥ 5
Founder at BrieferYC S23
Intro paths
Lucas went through Y Combinator (Summer 2023) — any YC alum in your network can reach them through the YC community.
Their group partner at YC was Aaron Epstein, General Partner at Y Combinator — the partner who ran Briefer's batch and knows the company first-hand. YC profile ↗
In turn, Lucas can intro founders to Briefer's investors below.
Briefer's investors · 1
Co-founders at Briefer
