Cássio Freitas
Senior Software Engineer at CI&T
Porto, Porto, Portugal
Summary
🤩
Rockstar🎓
Top SchoolCássio Freitas is a Senior Software Engineer based in Porto with over six years building performant React frontends and scalable Node/Next.js backends for global brands like INDITEX, HUGO BOSS, Tommy Hilfiger and YPÊ. He specializes in high-performance component development, micro-frontend integration, and front-to-back API stitching using React, Redux, React Query, TypeScript and Java Spring BFFs. At CI&T he focuses on sustainability-focused applications that help auditors and suppliers tackle wastewater, chemical safety and energy consumption, blending domain impact with engineering rigor. He has driven frontend architecture and UX from Figma to production, introduced feature flagging and robust testing practices, and contributed notable UI work to the popular open-source resend/react-email project (adding components, tests and UX features like code highlighting and copy/download). With a background in chemical engineering and a full-stack code cadet education, he brings a pragmatic systems view and cross-disciplinary curiosity to product-focused engineering.
6 years of coding experience
4 years of employment as a software developer
Junior Full-Stack Developer Code Cadet, Junior Full-Stack Developer Code Cadet at Code for All_Engineer's degree Chemical Engineering, Engineer's degree Chemical Engineering at Universidade Federal de Pernambuco
English, Portuguese, Spanish
Stackoverflow
1reputation
0reached
1answer
0questions
Github Skills (9)
javascript10
react10
jsx10
html9
css7
typescripts6
typescript6
jestjs6
typescript-types6
Programming languages (7)
Github contributions (5)
resend/react-email
Nov 2022 - Jan 2023
💌 Build and send emails using React
Role in this project:
Front-end Developer
Front-end DeveloperContributions:1 review, 26 commits, 15 PRs in 2 months
Contributions summary:Cássio primarily contributed to the development of React email components within the `resend/react-email` repository. They added and updated components such as `Section`, `Column`, and `Body`, including their corresponding tests and configuration files. The user also worked on the `CodeContainer` component for the preview section, adding features like code highlighting, copy to clipboard, and download functionality. The contributions involved modifying existing components and their tests to enhance the overall functionality and presentation of the email components.
reactemail
cassiorsfreitas/cassiorsfreitas.com
Dec 2023 - Apr 2026
Hey there! It's built with Next.js and styled using Tailwind CSS. Smooth sailing with Vercel hosting & deployment. Feel free to clone, explore, and join in the fun!
Contributions:34 PRs, 51 pushes in 2 years 4 months
javascriptmarkdownnextjstailwindcss
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