Volodymyr

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Volodymyr Kadomtsev
Flutter Developer
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Flutter Developer with 3+ years of experience building scalable cross-platform applications for mobile, web, and
desktop. Specialized in clean architecture, real-time features, offline-first applications, and high-performance UI.
Experienced in building production-ready apps with CI/CD pipelines, scalable backend integrations, and
maintainable codebases. Focused on delivering reliable applications with strong performance and long-term
maintainability.
Education
Petro Mohyla Black Sea National University Ukraine, Mykolaiv
Bachelor of Science in Software engineering
2021-2025

Languages
English: Upper Intermediate German: Intermediate Ukrainian: Native

Technical Skills
Language: Dart Framework: Flutter
State Management & Architecture
Riverpod 2, Bloc/Cubit, Provider
Clean Architecture, MVVM, Modularization, SOLID principles
Networking & APIs
RESTful APIs, GraphQL
Dio (Interceptors)
Real-time systems: WebSockets, Streams, Supabase Realtime
Data & Storage
SQLite (Sqflite), Hive, Firebase Firestore, Secure Storage
Offline-first architecture & caching
UI / UX
Design system implementation (Widgetbook)
Custom animations (Hero, Lottie)
CustomPainter
Responsive layouts (mobile, web, desktop)
Cloud & Backend Services
Firebase (Auth, Messaging, Analytics, Crashlytics)
Supabase
Advanced Features
Camera & media processing
Barcode / QR scanning
Google Maps & location services
Push notifications
Biometric authentication
Deep linking & navigation (GoRouter)
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Performance & Quality
Performance profiling (Flutter DevTools)
Widget rebuild optimization
Automated testing (unit, widget, integration)
Collaboration & Leadership
Code reviews
Technical documentation
Cross-functional collaboration (design, product)

Professional Experience (3+ years)

Come Back Agency Nov. 2024 - Present
Flutter Developer / Team Lead Ukraine - Remote
• Designed and maintained scalable Flutter architecture for complex cross-platform
applications (mobile, web, desktop) using shared business logic and modular architecture.
• Led development of large-scale production applications with complex domain logic, real-time
data synchronization, and offline-first architecture.
• Worked on fintech and crypto-related products, implementing wallet integrations, secure
transaction flows, and real-time blockchain data handling.
• Developed scalable applications supporting high user load and complex backend integrations.
• Implemented real-time features using WebSockets and Supabase (live updates, chat systems,
activity status).
• Collaborated closely with backend and product teams to design scalable APIs and system
architecture for long-term product growth.
• Mentored junior developers, conducted code reviews, and established engineering standards
across the team.

Selected Projects

Crypto Wallet Platform
• Developed a mobile application for managing crypto wallets and tracking transactions.
• Implemented secure authentication flows and real-time transaction updates.
• Applications used by thousands of users
• Systems handling high-volume real-time data

Cross-Platform Business Platform
• Built a scalable Flutter system supporting mobile, web, and desktop clients with shared
architecture.
• Designed modular features allowing faster product scaling and easier onboarding of new
developers.
MatrixSoftLabs Feb. 2024 - Oct 2024
Flutter Developer
Latvia - Remote
• Developed a scalable social platform with personalized feeds.
• Built a real-time chat system using Supabase.
• Implemented offline-first data synchronization.
• Optimized in-app purchases and app performance.

Selected Projects

Real-time Chat Platform

• Built a real-time messaging system using Supabase and WebSockets.
• Implemented presence tracking, read receipts, and message synchronization.

Social Media Application

• Developed a Flutter application with personalized content feeds and scalable backend
integrations.

OnePlusOne Solutions Nov. 2022 - Feb. 2024
Junior Flutter Developer 1.4 years Ukraine - Remote

• Developed mobile apps with custom UI and animations.
• Built a desktop sales and invoicing system.
• Integrated Firebase authentication and push notifications.

Selected Project

Sales & Invoicing Desktop Application

• Developed a Flutter desktop application for managing sales, invoices, and financial workflows.
• Implemented responsive layouts and data synchronization with backend services.