Radek Czemerys
Senior Software Engineer at Rumi.ai (Formerly Waitroom)
Oregon, Poland
Summary
🤩
Rockstar🎓
Top SchoolRadek Czemerys is a Senior Software Engineer with 11 years of experience specializing in React Native mobile development, AI-driven RAG pipelines, and resilient backend workflows. He has led mobile teams and shipped production-grade apps—building a React Native conferencing app at Rumi.ai that integrates WebRTC, meeting-memory AI search, and Temporal-backed pipelines. A remote-first engineer and technical co-founder, he bootstrapped a sex-education app to 100k+ users, handling payments, offline sync and native modules end-to-end. Radek is an active open-source contributor to flagship projects like react-native and the popular react-native-template-typescript, often focusing on platform-specific iOS/Android fixes and cleanups. Comfortable across TypeScript, Python and Go, he combines product-minded ownership with hands-on native code work and long-running system design. Based in Oregon with roots in Poland, he blends startup grit with deep mobile and AI integration experience.
11 years of coding experience
5 years of employment as a software developer
Engineer's degree, Computer Science, Engineer's degree, Computer Science at Wrocław University of Science and Technology
Polish, English
Stackoverflow
1,070reputation
174kreached
37answers
4questions
react-native
top-5%
Github Skills (35)
javascript10
ios10
mobile-development10
react-native10
ui-components10
typescript10
user-interface10
react-native-component10
java10
javas10
android10
typescript-types10
fabric10
typescripts10
notepad10
Programming languages (16)
Github contributions (5)
standardnotes/mobile
Apr 2020 - Feb 2022
Standard Notes for iOS and Android - https://standardnotes.com
Role in this project:
Mobile Developer (iOS)
Mobile Developer (iOS)Contributions:16 releases, 4 reviews, 520 commits in 1 year 10 months
Contributions summary:Radek focused on updating the React Native mobile application for iOS. They made changes to update the Android and iOS setups for a new version of React Native, including updating various libraries, and adding bridging headers. The user implemented functionality related to the Flipper debugging tool, including using the new flipper and updating the app delegate. Code changes were made across multiple files that support core functionality of the iOS app.
notesreact-nativestandardnotesandroidios
react-native-community/react-native-template-typescript
Sep 2019 - Jan 2023
👾 Clean and minimalist React Native template for a quick start with TypeScript.
Role in this project:Mobile Developer (iOS)
Mobile Developer (iOS)Contributions:41 releases, 21 reviews, 39 commits in 3 years 4 months
Contributions summary:Radek primarily contributed to the iOS side of the React Native template, including updates for new React Native versions. Their contributions involved fixing Hermes-related issues, correcting typos, and integrating new features to match React Native releases. The user also made changes related to Flipper integration and other platform-specific configurations.
templatereactboilerplatejestreact-native
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