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Ruslan
Barysiuk

Average Review
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Reputation
28
Finished gigs
0
Finished jobs
0
Website
munem91.github.io
Country
Not specified
Skills
Web, Mobile & Software Dev
iOS
Swift
Android
Mobile Apps
Front End
E-Commerce Development
Desktop Applications
Debugging
Specialization
Senior Flutter Developer (iOS & Android)
Hourly rate
$20/hr
Preferred payment options
Ethereum
USDT
AUDT
USDC
DAI
BNB Chain
USDT
USDC
DAI
BUSD
Polygon
DAI
Fantom
USDC
DAI
Arbitrum
USDT
USDC
DAI
Optimism
USDT
USDC
Base
USDC
About me
Senior Flutter developer: 5 years of commercial experience, 6 apps on the App Store and Google Play. I own the mobile side end to end: estimates, architecture, release, store review and rejection fixes. Strongest where Flutter meets the platform: subscriptions and IAP (StoreKit 2, Google Play Billing, RevenueCat, server-side validation); crypto wallets in Flutter (custodial and non-custodial, web3dart); HealthKit and Health Connect; real-time and AI (WebRTC, LiveKit, LLM streaming, TTS); camera, computer vision and on-device ML (ONNX Runtime, OpenCV, OCR); native Swift and Kotlin via Platform Channels. Recently took a stalled app from code audit to App Store and Google Play release in 1.5 months. Remote from Bangkok (GMT+7). Fixed price or hourly, payment in USDT. Portfolio: munem91.github.io/barysiuk_ruslan_resume/en.html
https://www.linkedin.com/in/ruslan-barysiuk-005b27236/

Work experience

Document Scanner & PDF Editor (contract)
September 2026 – October 2026
Job title
Senior Flutter Developer
Work experience & achievements
Joined a stalled document scanner app and took it from code audit to App Store and Google Play release in 1.5 months. Native camera SDKs, on-device ML and OCR (ONNX Runtime, OpenCV), PDF editing, RevenueCat subscriptions, store review fixes.
Healthy4u - AI health assistant
June 2025 – September 2026
Job title
Lead Flutter Developer (sole mobile dev)
Work experience & achievements
Rewrote a native iOS AI health assistant in Flutter and ran it for 15 months as the only mobile developer. HealthKit (40+ types) and Health Connect, native subscriptions on StoreKit 2 and Google Play Billing with server-side validation, LLM chat with streaming and TTS, watchOS prototype in SwiftUI. Live on the App Store and Google Play.
ProveUp - fitness battles app (contract)
May 2026 – September 2026
Job title
Senior Flutter Developer
Work experience & achievements
Fitness battles and freestyle football app: camera-based rep counting with computer vision and on-device ML, LiveKit/WebRTC video, avatar system, release builds for iOS and Android.
SFERA, Rabotnik24, Kerla, Gyber Wallet, Agrotook
January 2022 – May 2025
Job title
Flutter Developer
Work experience & achievements
Product apps on Flutter for iOS and Android: social platform (SFERA), hiring platform (Rabotnik24), classifieds marketplaces (Kerla, Agrotook), crypto wallet (Gyber Wallet: custodial and non-custodial, web3dart). Several apps built from one codebase via configs; legacy code migrated to Dart 3; releases to the App Store and Google Play.

Education

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