Олександр

OLEKSANDR GAILIUNAS
FLUTTER DEVELOPER

PERSONAL INFORMATION
Ukraine
[open contact info](look above in the "contact info" section)
LinkedIn: [open contact info](look above in the "contact info" section)

PERSONAL
Flutter Developer specializing in cross-platform mobile applications with Clean Architecture. • Technical expertise
includes extensive use of Bloc, GetX, Firebase, and secure RESTful API integrations. • Product-oriented mindset:
Focused on delivering maintainable code, high-performance UI, and seamless user experience.
English (pre-intermediate) German(intermediate) Ukrainian (native).

SKILLS
Flutter and Dart
Clean Architecture, Bloc, Provider, GetX
Firebase
Amplitude, AppsFlyer, Meta/Facebook App Events
REST APIs
Git, Codemagic
Non-relational databases: Hive, Shared Preferences
Networking: HTTP, Dio
Dependency Injection: Get It
Payments and Notifications
Navigator, GoRouter
Cache managers
Testing: Patrol, Mockito

WORK EXPERIENCE
Flutter Developer May 2024 - Present
Calaton Systems
Responsibilities:
Refactor legacy applications
Develop applications from scratch
Design and implement user interfaces
Collaborate with backend and design teams to implement new features
Apply Flutter-specific programming patterns
Develop business logic
Implement Server-Driven UI
Integrate third-party services

Stack of technologies:
Clean Architecture + MVVM
Firebase, Dio, Bloc, Video Player, Camera,Biometric auth, Get It, Lottie, Hive, Document scanning & uploading, Amplitude,
AppsFlyer, Meta/Facebook App Events.

Flutter Developer 2023 - May 2024
MAXOPEN STUDIO
Responsibilities:
Develop applications from scratch
Design and implement user interfaces
Apply Flutter-specific programming patterns
 Build business logic, application architecture, and technology stack
Integrate third-party services
Collaborate with backend and design teams to implement new features
Work with cloud functions

Stack of technologies:
Clean Architecture + MVVM
REST API, Firebase, Dio, Go Router, Lottie, Camera, WebView Flutter, Json Serializable, Bloc, GetX.

PROJECTS
Fin-tech project (under NDA)
Implemented secure user authentication with biometrics (Face ID, Touch ID) and token-based session
management using local_auth.
Ensured secure API communication with HTTPS and robust token refresh logic.
Developed document scanning and uploading features using camera and file pickers.
Configured build environments (flavors) and secure compile-time configuration using dart-defines to separate
Dev and Prod secrets.
Managed app signing and build generation for manual QA testing and Store releases.
Implemented Server-Driven UI.
Stack: Clean Architecture, Bloc, Dio, Firebase FCM, local_auth, GetIt, Dart Defines.

AI Flashcards Maker - Linguamill
Developed a language learning app allowing users to create or AI-generate personalized flashcards.
Integrated social authentication (Google, Apple) and local storage solutions.
Implemented efficient file management for audio assets using audioplayers and path_provider.
Set up user analytics with Amplitude and Firebase to track engagement.
Stack: Clean Architecture, Bloc, Firebase Auth, Hive, Audioplayers, Amplitude, Codemagic.

Soul Taine
Built a companion app for Bluetooth headphones interaction and configuration.
Implemented device connection logic and authentication via barcode scanning.
Optimized navigation flows using go_router for deep linking support.

Feofanivska Online Store
Developed an e-commerce app for grocery purchasing and water delivery services.
Implemented phone number authentication and secure user data storage.

ExpertMed
Created a medical assistant app for booking appointments and online consultations.
Enabled flexible login options via email or QR code scanning.
Integrated push notifications for appointment reminders.

EDUCATION
Automation, computer-integrated technologies and robotics 2023 - Present
Ukrainian State University of Railway Transport, Kharkiv

Law 2018 - 2023
Yaroslav Mudryi National Law University, Kharkiv