Олександр

OLEKSANDR KOTSIURENKO
FLUTTER DEVELOPER
📍 Ukraine | ✉️ [open contact info](look above in the "contact info" section) | 🔗 LinkedIn

PROFESSIONAL SUMMARY

Flutter Developer with 4+ years of commercial experience building and maintaining 10+
production applications for iOS and Android.

Most recently, worked as the sole mobile developer and owned the complete application
lifecycle: task planning, technical decisions, architecture, implementation, App Store review,
and Android distribution.

TECHNICAL SKILLS
Flutter & Architecture: Flutter, Dart, Riverpod, Provider, Clean Architecture

Data & Integrations: REST APIs, WebSockets, local persistence, Firebase, deep links,
WebView, Platform Channels

Testing & Delivery: Unit, widget and integration tests, App Store, Google Play, GitLab CI/CD,
Codemagic

AI-Assisted Development: Implementation, refactoring, testing, code review,
documentation, and technical research

PROFESSIONAL EXPERIENCE

2K | Flutter Developer Dec 2025 – Jul 2026

PROJECT

A cross-platform iGaming application covering authentication, account management,
payments, user verification, and core product flows. The iOS application was released
through the App Store, while Android distribution was handled through the company
website using a custom update mechanism.

RESPONSIBILITIES

Built the application from scratch as the sole mobile developer and owned task planning,
architecture, implementation, platform configuration, and stabilization.

Implemented networking, token refresh, request retry, environment configuration,
navigation, and error handling.

Delivered payment and WebView flows, document uploads, deep links, push
notifications, analytics, and platform-specific integrations.

Managed build configuration, App Store submission and review communication, iOS
releases, and Android APK distribution.

TECHNOLOGIES

Flutter, Dart, Riverpod, GoRouter, Dio, Freezed, json_serializable, Firebase, AppsFlyer,
Customer.io, Google Sign-In, WebView, Platform Channels, Kotlin, Swift

FAVBET TECH | Middle Flutter Developer Sep 2024 – Nov 2025

PROJECT

Modernization of legacy native sports betting and iGaming applications into a shared Flutter
codebase supporting multiple product configurations. The project focused on cleaner
architecture, eliminating legacy workarounds, real-time updates, and responsible gambling
controls.

RESPONSIBILITIES

Implemented registration, account recovery, verification, and responsible gambling limits
with validation and reactive UI updates.

Added 40+ deep links, including navigation from push notifications, and developed
WebSocket-based real-time functionality.

Extracted functionality from one application into a reusable Flutter package integrated
into multiple applications through Git submodules.

Participated in architecture planning, code reviews, production issue investigation, and
application stabilization.

TECHNOLOGIES

Flutter, Dart, Riverpod, GoRouter, REST APIs, WebSockets, reusable Flutter packages, Git
submodules, Firebase, deep links, flavors

BOOSTA | Junior → Middle Flutter Developer Feb 2023 – Nov 2024

PROJECTS

A portfolio of 10+ consumer FinTech applications covering lending, credit, personal finance,
and car insurance across multiple markets.

RESPONSIBILITIES

Developed applications from scratch and maintained production products while
progressing from Junior to Middle Developer.

Implemented quizzes, reusable UI, CustomPainter-based elements, referral systems,
WebView flows, analytics, push notifications, deep links, and localization.

Refactored legacy code, updated Flutter and package versions, prepared builds, and
published applications through the App Store and Google Play.

TECHNOLOGIES

Flutter, Dart, Riverpod, BLoC, Cubit, GoRouter, Hive, WebView, CustomPainter, Firebase,
AppsFlyer, OneSignal, Amplitude

EARLY EXPERIENCE

D REAMBIT | Junior Flutter Developer Nov 2022 – Feb 2023
Contributed to UI components, small feature updates, and minor fixes for a social drawing
application.

APP VESTO | Trainee → Junior Feb 2022 – Oct 2022
Implemented basic screens and UI components for book exchange and recipe
recommendation applications.