Sibelius Seraphini
Co-Founder at OpenPix
São Paulo, São Paulo, Brazil
Summary
🤩
Rockstar🎓
Top SchoolSibelius Seraphini is a seasoned full-stack engineer and startup founder with 12 years of experience building product-led companies and instant payments solutions from São Paulo. As Co-Founder of Woovi and CTO roles at OpenPix, Feedback House and Entria, he blends hands-on engineering with leadership in payments, React/React Native ecosystems, GraphQL/Relay, and backend systems. He is an active open-source contributor with notable fixes and enhancements to high-profile projects like Relay, react-native-camera and Flow/TypeScript type definitions, reflecting deep expertise across frontend, mobile and database layers. His background includes Android database engineering, TypeScript/Flow typing improvements, and building camera integrations for React Native, showing practical cross-platform problem solving. Sibelius documents his technical thinking publicly via an extensive zettelkasten, signaling a disciplined, research-driven approach to product and engineering decisions.
13 years of coding experience
6 years of employment as a software developer
Exchange Student Computer Science, Exchange Student Computer Science at University at AlbanyBachelor's degree Computer Science, Bachelor's degree Computer Science at University of São PauloTechinal System Programming and Development, Techinal System Programming and Development at Federal Institute of São Paulo, São Paulo, Brazil
English, Portuguese, French
Stackoverflow
5,453reputation
555kreached
34answers
42questions
Github Skills (62)
libstdc10
libc10
typesc10
javascript10
draft-js-plugins10
react-native10
flow-control10
sqlite10
libudev10
build-definition10
lib10
testing10
work-flow10
typescript10
flow-typed10
Programming languages (30)
Github contributions (5)
react-native-camera/react-native-camera
Dec 2017 - Oct 2020
A Camera component for React Native. Also supports barcode scanning!
Role in this project:
Mobile Developer (Android)
Mobile Developer (Android)Contributions:1 release, 2 reviews, 159 commits in 2 years 10 months
Contributions summary:Sibelius's contributions primarily focused on implementing and integrating a camera component within a React Native application. They added camera implementation for Android, mirroring the structure of an existing expo camera module. The code changes included setting up the necessary Android-specific components, and modifications to existing files, reflecting the creation of a functional camera interface within the React Native environment. This integration work is centered around providing camera functionalities within a React Native application specifically for the Android platform.
bar-codereact-nativeface-detectionrncameracamera
draft-js-plugins/draft-js-plugins
Sep 2020 - Sep 2020
React Plugin Architecture for Draft.js including Slack-Like Emojis, FB-Like Mentions and Stickers
Role in this project:Front-end Developer
Front-end DeveloperContributions:81 reviews, 23 commits, 153 PRs in 13 days
Contributions summary:Sibelius primarily contributed to modernizing and refactoring various React components and plugins within the `draft-js-plugins` ecosystem. Their work focused on migrating components to use hooks, improving code structure, and enhancing the functionality of plugins like linkify, mentions, anchor, and image plugins. They addressed linting issues, upgraded Babel, and incorporated TypeScript into the storybook configurations. The user also worked on refactoring button components.
draft-jsplugin-architecturereactslackdraft-js-plugins
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