Where does Lucas da Costa work?

Lucas da Costa is Founder of Briefer.

What companies did Lucas da Costa found?

Lucas da Costa founded Briefer.

Where did Lucas da Costa go to school?

Lucas da Costa studied at Y Combinator (S23); Universidade Federal de Santa Catarina (Bachelor of Computer Information Systems, Information Systems).

Lucas da Costa

Founder

Founder at Briefer

São Paulo, Brazil

FoundedBriefer · YC

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.

Founder at Briefer YC 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 ↗

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In turn, Lucas can intro founders to Briefer's investors below.

Briefer's investors · 1

Y CombinatorSan Francisco · $500K checks · since 2023

Co-founders at Briefer

Lucas VieiraFounder

Experience

ResendEngineeringcurrent2025 — presentSan Francisco Bay Area
Briefer (YC S23)Founder & CEO2022 — 2025São Paulo, Brazil
ElasticSenior Software Engineer2021 — 2022London, England, United Kingdom
ConvergeSoftware Team Lead2020 — 2021London, England, United Kingdom
ConvergeSoftware Engineer2017 — 2020London, United Kingdom
DiffiaSoftware Engineer2017
Shaw and PartnersSoftware Engineer2016 — 2017
myTappFullStack Developer - Intern2016Florianópolis e Região, Brasil
Hydra SystemsDevelopment Intern2015 — 2016
Hydra SystemsQA Intern2014 — 2015
SeTIC - UFSCNetwork Intern2013 — 2014

Skills & more

JavaScript19HTML516CSS14React.js1jQuery9Git10Node.js8Selenium1Java2Photoshop2SQL1Docker

+12 more

MochaRedux.jsReact NativeMetodologias ágeisTechnical WritingTddPublic SpeakingEnglishTypeScriptVimHaskellFunctional Programming

Languages Francês · Inglês · Português

TOEFL - ITP — ETS

From Lucas's professional profile.

Frequently asked questions

Who is Lucas da Costa?: 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.
Where does Lucas da Costa work?: Lucas da Costa is Founder of Briefer.
What companies did Lucas da Costa found?: Lucas da Costa founded Briefer.
Where did Lucas da Costa go to school?: Lucas da Costa studied at Y Combinator (S23); Universidade Federal de Santa Catarina (Bachelor of Computer Information Systems, Information Systems).