
Paul Kuzin
Senior iOS Developer, Swift and SwiftUI, iPhone Apps and Subscriptions
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Portfolio
Esperienza lavorativa
Senior iOS Engineer
Tutu
Jun 2024 - Present • 2 yrs 5 mos
Sole iOS developer for suburban rail at a major travel super-app: the Etrain app (4.7 stars, 1.17M+ active users) and the rail section of the super-app. Also shipped the Tours and Cars sections. - Long-distance train offers inside Etrain: a new revenue stream, monthly ticket volume +31% within 3 months of launch - Unified checkout: tariff selection in SwiftUI with snapshot tests and funnel analytics - Tours: native tour search from scratch, rolled out behind an A/B test - Widget with App Intents, native ads with A/B tests, in-app payments; owned releases 5.0-5.9 - Architecture refactor, SwiftLint, faster tests
iOS Engineer (independent)
mmthstudio
Jan 2020 - Present • 6 yrs 10 mos
Two-person app studio with own products in the App Store and Google Play. - Tube Map (London Underground): offline navigation, custom Metal rendering, widgets, Live Activities, subscriptions; Android, web client and Go backend - Knit It and Luvva: SwiftUI apps with onboarding and paywall funnels - CI on GitHub Actions, snapshot tests, automated TestFlight releases
iOS Tech Lead
Moscow Metro
Oct 2020 - Jun 2024 • 3 yrs 8 mos
Tech lead for 4 iOS developers on the official Moscow Metro app. The app won AVA Digital Awards Platinum (Public Sector, 2021). - Led the Personal Account module end to end (~80 screens) - FacePay biometric trip tracking and personal trip log - Card scanning with the Vision framework, QR top-up, NFC transit card linking - Virtual transit card: onboarding + KYC, auto-top-up - Solo-built the App Clip with Apple: ~180 MB down to 10 MB - Solo-built the Expo 2020 Dubai exhibition app (iPad + iPhone): 100% crash-free, 40,000+ unique users in 2 weeks - First CI/CD pipeline (GitLab CI + Fastlane): monthly to weekly releases - 50+ technical interviews for iOS hires