Llama Luna Team is a Canadian-based startup that has more than 3 million downloads, App Store Award Winner, Apple Design Award Finalist. I am the founding developer of the company's latest product, Mindllama, and responsible for all core parts of the app. Mindllama has already been featured as App of the Day in 35+ countries, Top 10 Mindfulness Apps, Apps We Love, and Do More with Interactive Widgets.Overall, I designed and developed:• Adaptive UI for 3 different platforms (iOS, iPadOS, watchOS), in 12 languages, and light/dark modes.• Interactive home and lock screen widgets, watch complications, and live activities.• Lottie animations with accompanying sounds and background audio resynchronization.• AVFoundation module with audio fading, mixing, and system silent mode support in background.• Stack: Swift, SwiftUI, AVFoundation, WidgetKit, Combine, Realm, Lottie.

I helped the company grow its user base by 800 000. Designed and developed a bunch of productivity and entertainment apps. Latest project ScreenArt allows users to customize home screen using widgets, icons, wallpapers, watch faces, chargers.Overall, I designed and developed:• Internal framework for customizable widgets using WidgetKit and SwiftUI (30+ templates).• Firebase-based backend with ability to easily migrate schemes.• Infrastructure for charging animations using App Intents.• Module to support one-click icon installation process using Configuration Profile (web clips).• Maintenance Swift-based scripts using Swift Package Manager.• Stack: Swift, UIKit, SwiftUI, WidgetKit, Combine, Realm, Firebase (Firestore, Storage, Functions).

Maintainer and contributor. Mostly PimineSDK & EasySwiftLayout. Overall, I designed and developed:• Library with 350+ stars that allows you to write clean and compact UI code. Used unit tests to fail proof the code.• SDK to reduce code duplication. Included 9 sub-packages (handy extensions, utilities, 3 different in-app strategies)• Support for 3 different in-app purchases implementations with similar general structure (local receipt validation, RevenueCat, SwiftyStoreKit).

The mova.io team is a custom mobile application development company based in Ukraine with over 1 million monthly active users. I was responsible for all core parts of the courier comparison app. It’s designed to help identify the best option for each job: by cost, convenience and delivery requirements. Overall, I co-designed and developed:• OCR to detect parcel labels, AR ruler to measure dimensions.• Easypost and Google Maps modules.• Support for multiple data charts (pie charts, bar charts)• Stack: Swift, UIKit, Combine, ML Kit, ARKit, Google Maps, Easypost, Realm, Charts.

Sanctuary: the first-ever astrology app to provide live, on-demand personalized readings with professional astrologers. Featured in Los Angeles Times, Wired, SELF, The New York Times. App of The Day on AppStore. Overall, I co-designed and developed: • Swift-based scripts to retrieve and analyze current subscribers receipts.• Zendesk to Intercom migration of chat for astrologers.• Stack: Swift, UIKit, Zendesk, Intercom, Kibana.