Zakhar Sazanavets

I build iOS apps that make it to release and hold up in production.

Nine years of Swift and Objective-C across fintech, banking, video editing, social and media. I shipped a video editor to the App Store, designed the app architecture for one of the largest banks in Belarus, serving 500,000+ active users, and built 100+ apps from scratch.

Core feature development for a social-first video editor: timeline editing, trims, crops, transforms, overlays and subtitles on Swift and AVFoundation. Built complex editing UI with gesture-based scaling, rotation and positioning, custom controls and smooth playback preview. Designed and optimized the media processing pipeline: render and export, composition building, performance and memory tuning. Integrated realtime WebSocket flows for subtitles, transcription and translation, and hardened async pipeline stability. Refactored legacy code and wrote tests for critical logic.

Alfa-Bank (Belarus)

Designed and implemented a new application architecture and code style for a retail mobile bank: cards, payments, credit, QR and savings. Owned the iOS app architecture end to end for one of the largest banks in the country, 500,000+ active users. Refactored legacy code and wrote tests, raising development speed and app performance.

Sababa Labs

Development and maintenance of the Gem4Life messenger: realtime chat with social features and media sharing. Shipped new features, refactored legacy code, fixed bugs and wrote tests.

System Technologies

Development and maintenance of Alfa Business Mobile 2.0, a corporate bank on iOS, plus a Flutter client app for the legal entities of a Kyrgyz bank, Commercial Bank KYRGYZSTAN. Introduced a new code style, refactored legacy code and wrote tests.

CreateX

Led the team as iOS Lead, Tech Lead and Architect. Built and shipped 100+ apps from scratch, among them a calculator that hides private files and contacts behind a passcode, an AR app that draws with facial expressions, cloud storage sync, a calorie and recipe tracker, a hidden Instagram story viewer, a caller ID and Instagram analytics for stats and likes.

Balinasoft

Built and shipped consumer apps: a driving-instructor search, a doctor search with chat, an iPad corporate app for documents and e-signature from a flash drive, food delivery, a calorie counter, a taxi app for riders and drivers, and a city audio-tour app that starts narration as you approach a landmark.