Oleksandr

FULLSTACK MOBILE DEVELOPER

OLEKSANDR
TKACH
[відкрити контакти](див. вище в блоці «контактна інформація»)
https://oleksandr-tkach-dev.github.io

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ABOUT ME
Mobile engineer with 4+ years of experience delivering Flutter
applications. I build end-to-end solutions using Clean Architecture
and BLoC, with API integrations and native capabilities. Focused
on performance, reliability, and maintainability.

Basic professional skills
Flutter & Dart Clean Architecture SOLID & Layering Responsive layouts

MethodChannel & EventChannel BLoC / Cubit Provider Riverpod Git

Firebase Google API Testing & Quality App Store & Google Play AOSP

PlatformChannels Sqflite SharedPreferences SecureStorage Apple Pay

Google Pay Dio WebSocket Socket.IO Retrofit WebRTC WorkManager

EDUCATION EXPERIANSE LANGUAGE
Bachelor of Science 2024 Senior Flutter Developer ENGLISH Basic (A2)
Now Carma Taxi s. r. o. · Slovakia
Kryvyi Rih State
UKRAINIAN Native
Pedagogical University 2022 Middle Mobile Developer
Physics & Math Faculty 2024 Cryptomeria Labs LTD · Singapore

2021 Junior Flutter Developer
2022 GIDD LLC · Poland

RESPONSIBILITIES FULLSTACK MOBILE DEVELOPER

Apr 2024 – Present Oct 2022 – Feb 2024
Senior Flutter Developer Middle Mobile Developer
Carma Taxi s. r. o. · Slovakia Cryptomeria Labs LTD · Singapore
Led development of real-time ride Developed real-time features using
lifecycle system (Socket.IO + REST) WebSockets, ensuring reliable data
ensuring stable synchronization sync and graceful handling

between client and backend under of connection edge cases
unstable network conditions Built iOS SMS logging feature via
Implemented in-app payments (Apple MethodChannel with native
Pay / Google Pay), handling edge cases integration and automation triggers
in payment flows and platform Worked on Android platform layer
configuration (AOSP-based systems), extending
Owned feature development across system capabilities beyond standard
two apps, enforcing consistent APIs
architecture (Clean Architecture + Integrated Firebase and third-party
BLoC) APIs (including Telegram) for
Improved app reliability by handling notifications and operational
connection state and failure scenarios workflows
in real-time features
AOSP Retrofit Sqflite FCM
Flutter & Dart BLoC / Cubit Dio
MethodChannel & EventChannel
Socket.IO Firebase Google Pay
Firebase WebSocket Google API
Apple Pay PlatformChannels

Feb 2021 – Aug 2022
Junior Flutter Developer
GIDD LLC · Poland
Developed UI and domain features Implemented local data persistence
using BLoC, growing into ownership
(SQLite) with synchronization

of larger modules to backend APIs
Built device tracking system with Integrated Firebase Authentication

Firebase Cloud Messaging and to provide secure user access,
background services (WorkManager) authentication flows, and account
enabling real-time location sharing management

SharedPreferences SecureStorage WebRTC SOLID & Layering Geolocation
Work Manager Firebase Auth Provider REST Retrofit Testing & Quality