Oleksandr Krynytskyi

Kraków

Summary

Mobile Developer with over 4 years of experience in crafting, maintaining, and optimizing cross-platform applications. Expertise in Dart and Flutter, complemented by a strong background in third-party integrations, scalable state management, and real-time backend services. Proven track record of collaborating within Agile teams to deliver high-performance, production-ready applications for iOS, Android, Web and desktop platforms. Specialized in the healthcare and telemedicine sectors, driving innovative solutions that enhance user experience and operational efficiency.

Overview

years of professional experience

Work History

Flutter Developer

BeKey

Kharkiv, Ukraine (Remote)

01.2022 - Current

- Developed high-performance cross-platform mobile applications from scratch using Flutter and Dart, ensuring scalable architecture.
- Integrated and maintained app backends with Supabase, leveraging real-time databases, authentication, and edge functions, realtime communication.
- Implemented efficient state management architectures using Redux and AsyncRedux to handle complex, app-wide data flows.
- Collaborated closely with product designers and backend engineers to build intuitive, responsive, and pixel-perfect user interfaces.
- Conducted code reviews, optimized memory management, and reduced application load times to ensure a seamless UI/UX.
- Configured and managed mobile deployment pipelines using Xcode, Android Studio, and Fastlane.
Achievements:
- Boosted UI responsiveness and reduced frame drops by 20-30% and more by eliminating redundant state rebuilds and optimizing widget rendering trees

Legal and Abuse Representative

Namecheap, Inc

Kharkiv, Ukraine (Remote)

02.2021 - 01.2022

Investigated customer abusive behavior cases including - fishing, fraud, malware, impersonation and other.
Analyzed customer feedback to identify trends, driving product improvement discussions.
Implemented process improvements that streamlined ticket resolution times significantly.

Education

Bachelor of Science - Electrical Power Supply Systems

Ivan Kozhedub Kharkiv National Air Force University

Kharkiv, Ukraine

01.2011

Skills

- Languages: Dart, Java
- Frameworks: Flutter (iOS, Android, Desktop)
- State Management: AsyncRedux, Provider, Redux
- Architecture: MVVM, Clean Architecture
- Databases: SQLite, Isar, Hive, PostgreSQL

- Cloud & Backend: Supabase (Real-time DB, Auth, Edge Functions), Firebase (Auth, Push Notifications, Crashlytics, App Distribution)
- Technologies & Protocols: WebRTC, gRPC, REST API
- Tools & CI/CD: VS Code, Android Studio, Xcode, CocoaPods, Fastlane, Git, JIRA
- Operating Systems: macOS, Windows, Linux

Languages

- English: B2

- Ukrainian: Native

- Russian: Native

Timeline