Bartosz Stelmaszuk
Software Developer at Google
Warsaw, Masovian Voivodeship, Poland
Summary
👤
Senior🎓
Top SchoolBartosz Stelmaszuk is a software developer with 11 years of experience specializing in native iOS and Android development, currently at Google in Warsaw. He has led cross-platform projects, built SDKs (distributed via CocoaPods and SPM), and created React Native wrappers while driving CI/CD automation and Fastlane-based publishing pipelines. His background includes senior roles where he maintained legacy Objective-C code, adopted Swift, and applied SwiftUI and the Composable Architecture to modernize apps. A hands-on engineer who co-founded a mobile startup and contributed to community knowledge through meetups and internal newsletters, he values sharing best practices as much as shipping features. Based in Warsaw with degrees in Computer Science and Aerospace Engineering, he combines system-level thinking with mobile UX sensibilities. An understated strength is his knack for automating release workflows, turning manual pain points into repeatable, reliable processes.
11 years of coding experience
9 years of employment as a software developer
Magister (Mgr) Informatyka, Magister (Mgr) Informatyka at Warsaw University of Technology
Polish, English
Github Skills (18)
rssi10
corebluetooth10
bluetooth-low-energy10
bluetooth9
swift8
sdk8
rxswift8
instagram7
ios7
energy7
flutter6
libimobiledevice6
storekit5
react-native4
dart4
Programming languages (5)
Github contributions (5)
getstoryteller/storyteller-sample-react-native
Oct 2021 - Dec 2022
Sample app showing integration with the Storyteller React Native SDK for adding stories to your mobile app
Contributions:2 releases, 3 reviews, 12 commits in 1 year 2 months
reactstorytellerreact-nativesdksdk-react-native
bartoszstelmaszuk/BeaconCityGame
Nov 2015 - Feb 2016
Contributions:2 PRs, 26 pushes, 3 branches in 3 months
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