Олександр

Tertychnyi Oleksandr
Flutter Mobile Developer
Ukraine, Dnepropetrovska obl., Dnipro
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Flutter Developer with 4+ years of commercial experience building scalable
cross-platform iOS and Android mobile applications in healthcare, social media,
streaming, and e-commerce domains.
Specialized in architecture design, real-time features, performance optimization,
Wear OS integration, and production app delivery. Experienced in leading mobile
development from scratch, optimizing large-scale applications (100k+ users), and
collaborating directly with international clients.

Experience
YBuild – Flutter Developer (project)

June 2026 – Present

● Designed and implemented the Flutter application architecture from scratch.
● Developed the app end-to-end from initial concept to production release.
● Integrated REST APIs for games, users, participation, payments and match
results.
● Implemented Stripe payment integration and payment status tracking.
● Developed game search, filtering and map-based discovery functionality.
● Integrated Google Maps for venue locations and route navigation.
● Designed application state management, API interaction patterns and
error/loading handling.
● Owned key technical decisions and coordinated frontend/API integration
throughout the project lifecycle.

Centum-d – Flutter Developer

April 2025 – June 2026

● Built and launched healthcare and sports Flutter applications from scratch,
including Wear OS integration and Samsung Health synchronization
● Developed a companion app for Samsung Galaxy Watch 4+ with critical health
alerts and emergency communication features

● Integrated analytics, in-app advertising, and monetization systems to support
user engagement and revenue generation
● Reduced API response processing time and improved screen loading
performance for a marketplace application with 100k+ users
● Led redesign and performance optimization for a marketplace app with 100k+
users
● Integrated advertising and sponsored content systems
● Led release management and app publishing to Google Play and App Store

Improvs – Flutter Developer (Contract)
February 2025 – April 2025

● Designed scalable and maintainable mobile application architecture following
Clean Architecture principles.
● Developed production-ready feature modules and complex UI screens
● Improved code structure and maintainability following clean architecture
principles

Cleveroad – Flutter Developer
March 2023 – January 2025

● Developed and maintained Flutter applications in social media, sports betting,
streaming, and marketplace domains
● Implemented live streaming, real-time chat, WebSocket connections, donation
systems, offline mode, geolocation, maps, and deep linking
● Published and maintained applications on Google Play and App Store
● Collaborated directly with US-based clients, discussing requirements, presenting
deliverables, and resolving technical issues

C1-Studio – Flutter / Full-stack Developer
December 2021 – February 2023

● Developed a mobile application for merchandisers with route tracking, product
management, and photo reporting
● Built backend APIs and admin panel for managing products, routes, and
employee workflows
● Implemented geolocation and workday tracking functionality

C1-Studio – Full-stack Developer

April 2020 – December 2021

● Maintained and enhanced web applications and internal systems
● Developed modules, integrated third-party APIs, and fixed production issues

AMCONSOFT – Android Developer
November 2019 – April 2020

● Developed a travel planning application with ticket, hotel, entertainment,
weather, and alert functionality
● Implemented booking-related flows and data synchronization features

SKILLS
Mobile Development:
Flutter, Dart, Android SDK
Architecture & State Management:
Clean Architecture, BLoC, Provider, MVVM
Backend & Realtime:
REST API, WebSockets, Firebase
Platform Integrations:
Google Maps, Geolocation, Deep Links, Push Notifications, Samsung Health, Wear OS
DevOps & Release:
CI/CD, Git, Firebase Crashlytics, Google Play Console, App Store Connect
Additional:
Performance Optimization, Offline Mode, Analytics, Ads Integration

ACHIEVEMENTS
• Led performance optimization of a marketplace application with 100k+ users
• Developed Wear OS healthcare solution with Samsung Health integration
• Built real-time streaming and chat functionality using WebSockets
• Published and maintained production applications on App Store and Google Play

LANGUAGES

English — Upper-Intermediate (B2)
Ukrainian — Native

EDUCATION

Oles Honchar Dnipro National University – bachelor
September 2015 – June 2019

Computer Engineering B19 №214437.

Dniprovsky State Technical University – master
September 2024 – June 2026