Cezary Kopacz
Lead IOS Engineer at Playbook
Warsaw, Masovian Voivodeship, Poland
Summary
🤩
Rockstar🎓
Top SchoolCezary Kopacz is a Lead iOS Engineer based in Warsaw with 11 years of experience building mobile products and leading teams across startups and client projects. He has a strong track record shipping end-to-end iOS apps—from architecting reusable MVP-based white-label solutions and BLE integrations to creating video-editing and analytics apps—while mentoring engineers and coordinating cross-functional hardware partnerships. As a hands-on developer he contributes polished UI work (notably a custom wave-like UICollectionView transition in his GitHub repo) and modernizes codebases through Swift migrations and refactors. Comfortable as both sole developer and team lead, he blends deep platform expertise (Swift, RxSwift, CoreBluetooth, MQTT) with a pragmatic focus on product-ready, maintainable architecture.
10 years of coding experience
8 years of employment as a software developer
Bachelor of Science - BS, Computer Science, Bachelor of Science - BS, Computer Science at Warszawska Wyższa Szkoła Informatyki
English
Github Skills (6)
swift10
ios10
uicollectionview10
animation9
ui-design5
ux-design5
Programming languages (2)
Github contributions (5)
CezaryKopacz/CKWaveCollectionViewTransition
Jul 2015 - Oct 2019
Cool wave like transition between two or more UICollectionView
Role in this project:
Mobile Developer (iOS)
Mobile Developer (iOS)Contributions:24 commits, 12 PRs, 18 pushes in 4 years 3 months
Contributions summary:Cezary primarily worked on the `ckwavecollectionviewtransition` repository, which is related to creating custom UI transitions for `UICollectionView` objects in iOS. Their contributions included implementing the core transition logic, adding assertions for improved code reliability, adjusting the code for Swift 3 and 4.2, and refactoring and improving the code. These changes suggest a focus on optimizing the visual aspects and functionality of collection view transitions.
transitionwaveswiftiosuicollectionview
CezaryKopacz/cezarykopacz.github.io
May 2015 - Mar 2018
Contributions:10 pushes, 1 branch in 2 years 10 months
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