Lucas Vieira
Programming at Resend
Santa Catarina, Brazil
Summary
🤩
Rockstar🎓
Top SchoolLucas Vieira is a seasoned software engineer and founder with 11 years of experience building and leading engineering teams across Brazil and startups backed by Y Combinator. He served as Founder & CTO of Briefer (YC S23) and has held senior technology roles including Head of Technology at Joga and Senior Software Engineer at Yalo, now contributing at Resend. Lucas combines hands-on development with product-minded leadership, shipping reliable systems and overseeing QA and test automation improvements—evidenced by contributions to the widely used Chai.js assertion framework. Based in Santa Catarina, he brings a blend of startup grit and engineering rigor, often focusing on improving robustness and developer experience. His background through YC and a long tenure at Chaordic highlights a capacity to scale teams and infrastructure while remaining deeply technical.
11 years of coding experience
7 years of employment as a software developer
Universidade Federal de Santa CatarinaS23, S23 at Y Combinator
Portuguese, English
Github Skills (7)
assertion10
javascript10
tdd10
chai10
bdd10
test-automation10
testing10
Programming languages (22)
Github contributions (5)
chaijs/chai
Apr 2016 - Jun 2019
BDD / TDD assertion framework for node.js and the browser that can be paired with any testing framework.
Role in this project:
QA Engineer / Test Automation Engineer
QA Engineer / Test Automation EngineerContributions:29 commits, 37 PRs, 22 pushes in 3 years 2 months
Contributions summary:Lucas primarily focused on enhancing the testing infrastructure of the Chai.js assertion framework. Their contributions include adding new test cases for no-op chains, implementing assertions for the `.does` chain, and verifying the type correctness of assertions like `within`, `above`, `least`, `below`, and `most`. Additionally, the user addressed configuration settings and fixed type issues within existing tests, indicating a focus on improving the robustness and reliability of the testing suite.
assertionstest-automationtesting-frameworkbrowserjest
briefercloud/briefer
Sep 2024 - Apr 2025
Dashboards and notebooks in a single place. Create powerful and flexible dashboards using code, or build beautiful Notion-like notebooks and share them with your team.
Contributions:44 reviews, 175 PRs, 527 pushes in 6 months
analyticsbibigquerybrieferbusiness-intelligence
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